Contents

Mitsubishi Electric MDU Breaker v2 Instruction Manual PDF

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1 of 56

Summary of Content for Mitsubishi Electric MDU Breaker v2 Instruction Manual PDF

MDU Breaker MDU Breaker (Breaker-mounting) (Breaker-mounting unit separate installation)

MDU Breaker main unit

MDU

MDU

Caution MDU Breaker main unit

Some items are not measured or displayed depending on models or specifications. These items and functions will be skipped.

Caution Danger

Indications and what they mean are listed below.

Wrong handling may cause dangerous situation in which possibility of fatal accidents or serious injuries assumed.

Wrong handling may cause dangerous situation in which possibility of significant or minor injuries, or material damages assumed.

Using this under certain conditions could cause electrical shock.

Read this Instruction Manual carefully prior to use, so that the product is used properly. After reading this manual, store it in a safe place so that it can be easily referenced when needed. Make sure that the end user receives this Instruction Manual.

For models with CC-Link communication, refer to the PLC Users Manual before reading this Instruction Manual. CC-Link System Master/Local Module Users Manual * The CC-Link version is CC-Link Ver. 1.10.

Danger

Do not touch the terminal area. Doing so may cause electrical shock.

MDU BREAKER: BREAKER-MOUNTING

NF400-SEW with MDU, NF400-HEW with MDU NF800-SEW with MDU, NF800-HEW with MDU

MODEL

INSTRUCTION MANUAL

1

Table of Contents

1. Safety Precautions 3

2. Precautions for Use 3

2.1 Standard operating conditions 3

2.2 Withstand voltage test 4

2.3 Connection and installation 5

2.4 Preparation before use 6

2.5 Requests 6

2.6 Notes on usage 6

3. Cautionary Instructions for Handling MDU Breaker 7

3.1 Cautionary instructions for using MCCB 7

3.2 Periodic inspections 7

3.3 Setting method of overcurrent tripping characteristics 8

3.4 Testing method of overcurrent trip 9

4. Alarm Contact Output (Optional) 10

4.1 Contact capacity and combinations for alarm contact output 10

4.2 Precautions for alarm contact output usage 10

5. MDU Breaker Installation Procedure 11

5.1 Installing MDU Breaker main unit 11

5.2 Attaching connection cable to MDU Breaker (separate installation) 11

5.3 MDU installation (separate installation) 12

5.4 Wiring of MDU terminal block 13

6. MDU Features and Functions 15

6.1 Features of MDU 15

6.2 Functions of MDU 15

6.3 Measurement functions 16

6.3.1 Measurement function list 16

6.3.2 Measurement rated values/measurement range and accuracy 17

6.4 Monitoring functions 21

6.4.1 Monitoring function list 21

6.5 How to use monitoring functions 22

6.5.1 MDU Breaker alarms 22

6.5.2 MDU Breaker status 24

6.5.3 Fault causes 24

6.5.4 Electric current demand upper/lower limit alarms 24

6.5.5 Neutral line open phase alarm (NLA) 25

6.6 Electric energy pulse output/CC-Link communication section specifications 25

6.6.1 Electric energy pulse output 25

6.6.2 CC-Link communication 25

2

7. Names and Functions of MDU Parts 26

7.1 Display/operation panel 26

7.2 Terminal area 26

7.3 CC-Link setting area (with CC-Link communication option) 27

7.4 Number of CC-Link communication connectable units and precautions 28

7.5 Installation and wiring for products with CC-Link communication 29

7.5.1 Terminator installation 29

7.5.2 Shielded wire grounding 29

8. MDU Detailed Specifications 30

8.1 Precautions for measurement 30

9. MDU Operation Procedure 32

9.1 Operating method for main menu screen 32

9.2 Measurement value display and display contents 33

9.3 Display method for protection characteristic setting values 37

9.4 Fault/alarm display methods and display contents 39

9.5 Method for resetting fault cause/current, alarm, maximum value, electric energy, and reactive energy 39

9.6 Method for various settings 40

9.6.1 Setting method for measurement-related items 40

9.6.2 Setting method for alarms 42

9.6.3 Setting method for LCD 44

9.6.4 Setting method for date and time 46

9.6.5 Setting method for electric energy 46 9.7 Measurement display list 48

10. Appendix 50

10.1 Precautions for setting operation 50

10.2 Precautions when setting via CC-Link communication 50

10.3 Precautions for MDU with CC-Link communication 51

10.4 I/O signal list (with CC-Link communication) 51

10.5 Remote register allocation (with CC-Link communication) 52

10.6 Communication error codes and solutions 52

10.7 Troubleshooting 52

3

1. Safety Precautions This Instruction Manual is meant mainly for those with specialized electrical knowledge who will use this product to manufacture assembled products, perform electrical work, or conduct maintenance and inspections. This also includes those who will operate this product (the end user).

When installing or removing MDU Breaker main unit and a Measuring Display Unit (MDU), first turn the host circuit breaker OFF and confirm that no electricity is flowing. This product must be handled by someone with specialized knowledge.

Caution

2. Precautions for Use Unless otherwise noted, the following terms in this Instruction Manual indicate the models shown below.

2.1 Standard operating conditions

The standard operating conditions are described below. Be sure to use MDU Breaker within these conditions. [1] Operating ambient temperature: -10C to +40C (must not exceed an average of +35C within a 24 hour period) [2] Ambient storage temperature: -25C to +55C (no condensation/freezing) [3] Relative operating/storage humidity: 85% RH or less (no condensation) [4] Altitude: 2,000 m or lower [5] Operating/storage atmosphere: Must contain hardly any dust, smoke, corrosive gas, combustible gas, moisture, salt, etc. If the ambient temperature of MDU Breaker exceeds +40C, use with a decreasing continuous load current.

Ambient temperature of +50C: 0.9 times, ambient temperature of +60C: 0.7 times Do not install in abnormal environments subject to high temperature, high humidity, dust, corrosive gas, vibration, impact, etc. Doing so may

cause electrical shock, fire, or may cause the product to stop working. Do not wipe the MDU Breaker main unit or MDU with thinner, detergent, or chemical cloth.

Doing so may fade printing, reduce insulation performance, or cause mold to form. Clean with air or by brushing. The case of the MDU may become discolored depending on the environment. However, this will not have any effect on performance. The LCD may have bright (always on) or dark (always off) pixels due to the characteristics of LCDs.

Because LCDs contain many display elements, there is no way to ensure that bright or dark pixels will never occur. Bright or dark pixels are not defects in the product itself.

Caution

Molded Case Circuit Breaker (MCCB) NF400-SEW with MDU, NF400-HEW with MDU NF800-SEW with MDU, NF800-HEW with MDU

400 A frame 800 A frame

4

2.2 Withstand voltage test

When conducting a MDU terminal test, always connect the MDU Breaker main unit and MDU. A voltage measurement transformer is connected between poles on the load side of the MDU Breaker main unit. In the table below, indicates that, because it causes a failure, withstand voltage test between poles on the load side must not be performed.

In the table below, indicates that, although nothing broke during a 500 VDC insulation resistance test, there was a low insulation resistance value. No problems found during withstand voltage test and insulation resistance test conducted on entire main circuit and between ground on MDU

Breaker main unit. When checking DA, DB, DG, SLD, and FG terminal conductivity for models with CC-Link communication, do not allow the voltage between each

terminal to reach 5 VDC or higher. Doing so may cause failure.

*1. Test with MDU terminals (L1, L2, 114, 113, DA, DB, DG, SLD, FG) as ground side. *2. Test with MDU terminals (114, 113, DA, DB, DG, SLD, FG) as ground side. *3. Do not perform a withstand voltage test between MDU terminals (DA, DB, DG, SLD) and MDU terminal (FG). *4. MDU terminals (DA, DB, DG, SLD, FG) must always be tested together.

Measurement point/test

Between MDU terminals (L1, L2) and MDU terminals (DA, DB, DG, SLD, FG) (with CC-Link communication) (*3) (*4)

Insulation resistance measurement

ON OFF

Withstand voltage test

ON OFF Test conditions

Status of handle Between live part and ground

Between main circuit and MDU terminals (L1, L2, FG) Between power supply and load terminal

Between main circuit and MDU terminals (114, 113, FG) (with electric energy pulse output) Between main circuit and MDU terminals (DA, DB, DG, SLD, FG) (with CC-Link communication) (*4) Between MDU terminals (L1, L2) and MDU terminal (FG) Between MDU terminals (L1, L2) and MDU terminals (114, 113, FG) (with electric energy pulse output)

Between different poles

Line side

Load side

Between left and middle poles Between middle and right poles Between left and right poles Between left and neutral poles, Between middle and neutral poles, Between right and neutral poles (for a four-poles circuit breaker) Between left and middle poles Between middle and right poles Between left and right poles Between left and neutral poles, Between middle and neutral poles, Between right and neutral poles (for a four-poles circuit breaker)

2500 VAC 1 min.

2500 VAC 1 min. (*1)

1500 VAC 1 min. (*2)

Caution

5

2.3 Connection and installation

Figure 1. Connection method in a single-phase two-wire circuit

Caution: Live part Load

Load side

Line side

Load side

Line side

Figure 2. Connection method in a single-phase three-wire circuit

Note that a three-pole MDU Breaker product cannot be used with a three-phase four-wire system.

The following table shows the items that can be measured when a three-pole product is used with a three-phase four-wire system.

1 2 3 1 2 200 V

100 V 100 V

3

Caution

A connecting wire of 5.5 mm2 or longer is recommended on the primary side.

Measurement item

Load current

Line voltage

Harmonic current Electric power/ reactive power Electric energy/ reactive energy Power factor

Voltage phase, N phase

Voltage phase, N phase Between voltage phases, Between voltage phase and N phase

No CT on N phase, so measurement not possible

No VT between N phases, so measurement not possible

Status Reason

No CT on N phase, so measurement not possible

No CT on N phase and no VT between N phases, so N phase not added

No CT on N phase and no VT between N phases, so N phase not added

No CT on N phase and no VT between N phases, so N phase not included

MDU Breaker cannot be used with the power side and load side reversed. Do not forcefully pull the connection cable between the MDU and MDU Breaker main unit (15 N or less). Doing so may loosen or disconnect

the cable. When installed to the MDU, if the MDU Breaker main unit cuts off a fault current and must be replaced with a new unit, also replace

the MDU. It cannot be reused. The connection cable between the MDU and MDU Breaker main unit forms a small-signal circuit. Install it at least 10 cm away from strong circuits.

Use with the area around the connector fixed in place, so that no external forces are applied to the connector connection area when opening/ closing the front door. When bending the cable, maintain a radius of at least 20 mm.

The connector area used to connect to the MDU is insulated from the inside of the MDU Breaker main unit. The product will operate normally and will not break even if the MDU Breaker main unit is powered with the connector area disconnected (open).

If a MDU will be installed later, do so within 1.5 years from installing the MDU Breaker main unit. Do not insert and pull out cables from the connector area more than 20 times each on the MDU Breaker main unit and MDU. Pulling out the connection cable connector when MDU control power is applied may cause a MDU alarm or the like to be erroneously displayed.

If this happens, reset the alarm and clear the memory when pulling out the connector and starting use. Control power is required for the MDU. Apply the control power supply voltage shown on the MDU between the L1 and L2 terminals.

Measurement, display, electric energy pulse output, CC-Link communication, and MODBUS communication cannot be used without power. Install a short-circuit protector (using a circuit breaker or fuse) to the control circuit. If using MDU Breaker with a single-phase two-wire circuit, connect it as shown in Figure 1. The left pole (1-phase) load side is a live part, so be sure to insulate it. Use the middle pole (2-phase) and the right pole (3-phase) current, and two voltage between the middle pole (2-phase) and the right pole (3-phase) as measurement data. Ignore the left pole (1-phase) current, as well as the voltage between the left pole (1-phase) and the middle pole (2-phase) and between the right pole (3-phase) and the left pole (1-phase). If using MDU Breaker with a single-phase three-wire circuit, connect it as shown in Figure 2 below with the neutral line connected to the middle pole (2-phase). If the neutral line is connected to either the left pole (1-phase) or the right pole (3-phase), it will be impossible to measure with MDU.

6

2.5 Requests The free warranty period and warranty scope for this product are as follows. Free warranty period The free warranty period lasts for one year from the time of purchase. Warranty scope

(1) Any failures that occur during the warranty period will be repaired free of charge, assuming that the usage status, usage method, usage environment, etc. are as described in the products catalog, Users Manual, warning labels, etc., and that the product was used under standard conditions as described in the precautions, etc. However, the free warranty period shall last a maximum of 18 months after manufacture, with a maximum of six months for the distribution

period after the product is shipped from Mitsubishi Electric. (2) A fee will be charged for repairs under the following circumstances, even if the product is still within the free warranty period.

Failures resulting from inappropriate storage/handling, carelessness, error, etc. on the customers part. Failures resulting from installation mistakes. Failures resulting from misuse or unreasonable modification. Failures resulting from fires, abnormal voltage, or other external events beyond human control, or from earthquakes, wind disasters, or other

natural disasters. Failures resulting from phenomena that could not be foreseen using the scientific technology standards at the time the product was shipped by Mitsubishi Electric.

The free warranty described here applies only to the delivered product, and does not apply to any damage or the like caused by failures in the delivered product.

This free warranty does not apply to any damage or the like caused due to reprinting or reproducing the information included in this document in whole or in part in any form without the consent of Mitsubishi Electric.

All efforts have been made to keep the information in this document current as software and hardware is revised. However, there may be cases where inconsistencies arise.

2.6 Notes on usage (1) The products described in this Instrunction Manual were designed and manufactured as general-purpose items meant for general industrial use, etc.

Please contact Mitsubishi Electric sales to discuss use for special purposes including atomic energy, electric power, aerospace, medical, or passenger transport devices or systems.

(2) Mitsubishi Electric shall not be held responsible for damage caused for reasons not attributable to Mitsubishi Electric; opportunities or profit lost by customers caused by Mitsubishi Electric product failure; damage caused from extraordinary circumstances, secondary damage, accident compensation, damage to anything other than Mitsubishi Electric products, or compensation for any other work, whether foreseen or not by Mitsubishi Electric.

2.4 Preparation before use The LCD display is covered with a scratch-proof protective sheet. Remove it before operating. When removing the sheet, the LCD display may light up due to static electricity, but this is not abnormal. After natural electrostatic discharge, the illumination will turn off soon. In addition, display may flicker due to the internal processing for the refresh of display.

Remove the protective sheet before use.

MDU

7

3. Cautionary Instructions for Handling MDU Breaker 3.1 Cautionary instructions for using MCCB

Electrical work must be performed by a qualified person (electrical worker). Maintenance and inspections must be conducted by someone with specialized knowledge. Turn the host circuit breaker OFF and confirm that no

electricity is flowing. Doing otherwise could cause electrical shock. Connect the line side and load side correctly. When connecting the power supply, make sure that the terminal screws are tightened at the

torque listed on the included terminal screw case. Otherwise, a fire may be resulted. Install MDU Breaker so that no dirt or dust, concrete dust, iron dust, rainwater, or other foreign matter enters. Doing so may result in a fire

or operation accident. Make sure protective grounding is performed for the load device. Be sure to connect the neutral line to the two-phase for a single-phase three-wire system, and connect the neutral line to the neutral-phase

for a three-phase four-wire system. If the product automatically cuts off, resolve the issue before switching the handle to ON. Otherwise, an electric shock or a fire may be resulted. To configure, first set the MDU Breaker main unit to OFF or TRIP.

Caution

3.2 Periodic inspections

Make sure that the product is not energized prior to performing periodic inspections. Otherwise, an electrical shock, a device accident, or a fire may be resulted. Periodically tighten terminal screws. Otherwise, a fire may be resulted.

Caution

To prevent trouble and to maintain the performance of the breaker, inspect the breaker one month after starting use and periodically thereafter according to the operation environment.

Yardstick for inspection periodicity

Clean and dry environment1

2

3

Once every 2 to 3 years

Once a year

Once every six months

Environment not exposed to severe dust, corrosive gas vapor, salt, etc.

Other places than 1 and 2

CriterionInspection item

4. Check whether the temperature has abnormally risen. Maximum allowable terminal temperature rise is 60K. (There is a slight temperature difference between the terminals on the line side and the load side, and between the middle pole and the left and right pole.)

3. Internal submersion by inundation or substantial mud or dust not adhered?

5. Is there ON/OFF operation by handle smooth?

6. Is there TRIP operation by trip button?

1. Is any conductor connection not loosened?

2. Are the cover and base not cracked or otherwise damaged? Is the handle not broken?

By visual inspection, the rear studs of terminals, the tightening area of the main body, and the molded area must not discolor from burning. When the current of each phase is balanced, there is no terminal that shows an abnormally high temperature rise. When the load current is balanced, the temperature difference between the left and right of the base is small.

Operation should be done smoothly.

The circuit breaker should be able to reset after tripping.

No loosening allowed. If loosened, the connection should be retightened with such appropriate torque as indicated in the Attached Table.

No internal submersion nor substantial mud and/or dust adhered to. In case of internal submersion, replace the circuit breaker with a new one, or have it overhauled at our service center.

No crack nor damage on the cover and base. No broken handle.

3.3 Setting method of overcurrent tripping characteristics (1) Open the transparent cover. (2) Turn the dials to set the tripping characteristics. As shown in the figure below, use a screwdriver to turn the dials for setting tripping characteristics.

Current setting 1 (In) Long time delay operating time (TL) Short time delay tripping current (Is) Step type Short time delay operating time (Ts) Pre-alarm current (lp)

Current setting 2 (lr) (*1) Instantaneous tripping current (Ii)

Consecutive adjustable type

* When setting ls, the value next to the value that was set may actually be set.

A flathead screwdriver with a tip width of 4.5 mm and a thickness of 0.6 mm is ideal for changing settings. The dial for setting current setting 1 (In) provides a clicking sensation when turned. Do not use more force than necessary when changing settings. Doing so may cause accident. (The optimal operation torque is 0.05 Nm or less.) The arrows on all dials (except for adjustable current setting and instantaneous tripping current) must be set to setting values within the thick lines.

Leaving the dial in an intermediate position may result in the next setting value being set. Setting values can be confirmed using the MDU or the separately sold Y-360 breaker tester/setting device. To configure, first set the MDU Breaker main unit to OFF or TRIP. If the long time delay operating time is set to 12 s, long time delay operation may be performed prior to short time delay operation.

Current setting 2 (consecutive adjustable type)

Current setting 1 (step type)

Long time delay operating time

Short time delay tripping current *

Instantaneous tripping current

Pre-alarm current

Short time delay operating time

4 5 6 7 8 10 4

6 8 10

12 14 16

3

2

100

.06 .3

.1 .2

.7

.8 .9

1.0

60

12 150

300 350

250 225

200 In(A)

TEST TL(s) Ts(s) Ip(In,Ir)

Is(In,Ir) Ii(400 A) .5

.7 .8

1 Ir(400 A)

Turn the dial in the direction of the arrow to the desired setting.

(3) Find the sticker for the set current setting from among the replacement stickers, and stick the current setting sticker to the rated value display location on the handle.

(4) Close the transparent cover. Affix a sealing sticker if required.

Precautions when setting short time delay tripping current (Is) and instantaneous tripping current (Ii) * Short time delay operation will not function if short time tripping current (Is) is set to the same value (or higher) as the value for instantaneous tripping

current (Ii).

(1) Value of short time delay tripping current (Is) exceeds value of instantaneous tripping current (Ii) Example: When NF400-SEW with MDU Ir = 200 A, if ls = 10 lr and li = 4 rated current, ls = 2,000 A and li = 1,600 A, so instantaneous tripping operating functions prior to short time delay tripping operation. The operating characteristic curve is shown in the figure below.

(2) Value of short time tripping current (Is) is the same as value of instantaneous tripping current (Ii) Example: When NF400-SEW with MDU Ir = 200 A, if ls = 10 lr and li=5 rated current, ls = 2,000 A and li = 2,000 A, so instantaneous tripping operation is prioritized over short time delay tripping operation. The operating characteristic curve is shown in the figure below.

Short time delay operating characteristic

Instantaneous operating characteristic

Ii Is Current

O pe

ra tin

g tim

e Short time delay operating characteristic

Instantaneous operating characteristic

Ii Is

Current

O pe

ra tin

g tim

e Setting example 1 Current setting 1 : Maximum

Current setting 2 : 0.7 Current setting : 280 A (= 400 A 0.7)

Current setting 1 : 250 A

Ramp characteristics is fixed to ON.

Ramp characteristics of LTD

Ramp characteristics of STD Current setting 2 : 0.7 (does not function) Current setting : 250 A

Setting example 2

300 350

250 225

200 In(A)

.5

.7 .8

1 Ir(400 A)

300 350

250 225

200 In(A)

.5

.7 .8

1 Ir(400 A)

*1: The adjustable current setting dial functions when the current setting dial is set to maximum.

TL Is

Ts

I

Ii

In,Ir

IP

T

8

3.4 Testing method of overcurrent trip Test by using the Y-360 breaker tester (option) or by energizing the MDU Breaker main unit. If using the Y-360 breaker tester, follow the instructions in that product's Instruction Manual.

This section describes how to test after energizing the MDU Breaker main unit.

(1) Send AC power to the MDU Breaker main unit from a 3-phase power supply or 1-phase power supply. When using a 1-phase power supply, do so from two poles in series.

(2) Each operating current can be confirmed by checking the LEDs on the front of the MDU Breaker main unit.

Current adjustable resister Current adjustable resister

70% LED (green) : Acceptable when it begins to stay ON within 60% to 80% of current setting. PAL LED (yellow) : With lp = 0.7 lr, acceptable when it starts to flash every 0.5 seconds within 60% to 80% of current setting. OVER LED (red) : Acceptable when it begins to stay ON at 105% to 125% of current setting.

(3) The long time delay and pre-alarm operating times can be confirmed by sending a current equivalent to 200% of current setting. However, if a current exceeding current setting is sent prior to this test, the operating time will shorten and the first measurement will be invalid. Tripping the MDU Breaker main unit will reset the trip circuit, allowing the following operating time to be measured correctly.

200% current

70% LED (green)

PAL LED (yellow)

OVER LED (red)

Pre-alarm operating time Begins to stay ON

Long time delay operating time Trip

Caution For the pre-alarm contact output for a MCCB (with alarm contact attached [optional]), the MDU is connected to the MDU Breaker main unit and

will not operate unless control power is applied to the MDU and the alarm contact output. When the test is performed using the Y-360 breaker tester, the measurement function, alarm function, fault cause and current display, and communication in the MDU cannot be checked.

Acceptable if measured operating time is within range below.

Measurement item TL = 60 s TL = 100 s TL = 150 s

Pre-alarm operating time 24 to 36 s 40 to 60 s 60 to 90 s

Long time delay operating time 48 to 72 s

TL = 12 s

4.8 to 7.2 s

9.6 to 14.4 s 80 to 120 s 120 to 180 s

9

10

4. Alarm Contact Output (Optional)

Note that alarm contact output will not operate unless control power is applied to the MDU and the alarm contact output.

The MDU is used as separate installation. Alarm contact output is a factory installed option. It cannot be installed after.

Caution

4.1 Contact capacity and combinations for alarm contact output Refer to the table below for alarm contact output contact capacity.

COS = 1 COS = 0.4, L/R = 0.007

125 VAC 3 A 2 A 250 VAC 3 A 2 A 30 VDC 2 A 2 A 100 VDC 0.4 A 0.3 A

Accessory device name

PAL OAL

Part names

PAL

Control power

P2 P1

LED display PAL

618 PALc

Contact output 617 PALa

TI

Control power

P2 P1

LED display OAL PAL

618 PALc

Contact output 617 PALa

518 OALc 517 OALa

Alarm name

4.2 Precautions for alarm contact output usage

Control power is required for alarm contact output. Connect control power to terminals L1 and L2. (No polarity.) Rated voltage: 100 to 240 VAC/DC common 50/60 Hz VA consumption: 5 VA

Use a power supply to prevent power outages when the MDU Breaker is tripped. Note that alarm contact output will not operate unless control power is applied to the MDU. Confirm that the MDU Breaker and the MDU are

securely connected with a connection cable. Make sure that terminal connections are tightened at the optimal tightening torque (0.9 to 1.2 Nm). Alarm contact output may generate a slight noise when control voltage is applied. This is due to the operation of the internal electronic circuit,

and is not an abnormality. If alarm contact output is attached, internal accessory devices cannot be installed on the right pole side.

Caution

11

5. MDU Breaker Installation Procedure

Use the included circuit breaker fixing screws to install the MDU Breaker. (Figures 1 and 2)

If installing with connection cables attached to the MDU Breaker main unit, make sure that connection cables and connectors are not caught and damaged. Connection cable connectors are precision parts. Be especially careful to protect them from damage during installation. This product uses dedicated connection cables. Using other cables or modifying them may prevent proper measurements from being made. Install with at least 40 mm of wiring space to the right and left sides of the MDU Breaker main unit, in order to wire connection cables and attach connection cable connectors.

Caution

Figure 2. 800 A frame circuit breakerFigure 1. 400 A frame circuit breaker

Circuit breaker installation locations (4)

MDU Breaker main unit

MDU Breaker main unit

Fixing screw M672 (tightening torque: 4.7 to 6.3 Nm)

Circuit breaker installation locations (4) Fixing screw M635 (tightening torque: 4.7 to 6.3 Nm)

5.1 Installing MDU Breaker main unit

Caution

MDU connector Connection cableConnector

Fasten the connection cable with clamps to avoid undue force.

5.2 Attaching connection cable to MDU Breaker (separate installation)

(1)

(2) Insert until you hear it click into place.

Click!

(1) Connect the connector of the connection cable to the connector of the MDU Breaker main unit's right side.

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The MDU has the reset switch, address (station number) setting switch (when CC-Link communication functions are equipped) and communication speed setting switch (when CC-Link communication function is equipped). Install the MDU onto a position where you can easily perform reset operation and change settings.

Caution

5.3 MDU installation (separate installation)

(1) Installation to the IEC rail (35 mm)

[1] Hook it on.

IEC rail

IEC rail installation fastener

[2] Push it in.

Removable connector

Screws

[3] Loosen the two screws of the removable connector and remove the connector.

IEC rail installation fastener

[5] Pull up the unit.

[4] Lower the IEC rail installation fastener.

Installation groove

Terminal cover

When reattaching the removed terminal cover, hook it up to the installation groove.

(3) Connection cable installation Open the terminal cover of the MDU and connect the connection cable to the connector.

(2) Removal from the IEC rail (35 mm)

Screwdriver insertion position

[1] Insert the screwdriver.

[2] Remove the connector cover.

Connector cover

13

Caution

5.4 Wiring of MDU terminal block [Breaker-mounting MDU]

The power supply side terminals of the MDU are M3 screws. For tightening, apply the suitable tightening torque (0.5 to 0.7 Nm).

If two crimp terminals are used for transition wiring on the power supply side terminal of the MDU, it may be difficult to close the terminal cover depending on the wire and the crimp terminals.

In that case, close the terminal cover after taking measures such as bending the crimp terminals. From the load side terminal of the MDU, remove the connector cover and removable connector, and connect a wire. For the suitable size of terminal block wire, use those shown below. (In the case of no-transmission specification, the load side terminal is not provided.)

Screwdriver insertion position

[1] Insert the screwdriver.

[2] Remove the connector cover.

Loosen the (two) screws and remove the connector.

Connector cover

Terminal cover Power supply side terminal (M3 screw)

Load side terminal (Removable connector)

Suitable wire size One connected Two connected

Solid wire 0.2 to 2.5 mm2

0.2 to 2.5 mm2

0.25 to 2.5 mm2 (*1) 0.25 to 1.0 mm2 (*1)

0.25 to 2.5 mm2 (*2) 0.5 to 1.5 mm2 (*3)

0.2 to 1.0 mm2 (*4)

0.2 to 1.5 mm2Twisted wire Twisted wire: Twisted wire with rod terminal (with no insulation sleeve) Twisted wire: Twisted wire with rod terminal (with insulation sleeve)

*1. Pin terminals shown below: A series as applicable terminals *2. Pin terminals shown below: AI series as applicable terminals *3. Pin terminals shown below: AI-TWIN series as applicable terminals *4. When polyethylene insulation vinyl sheath cables (equivalent to those with a CPEV shield) are used, the connection of two wires, up to 1.2 mm2 as solid wires, is possible.

After a wire is inserted into the terminal, tighten it with the adequate tightening torque. In addition,when tighteninga screw, start turning it slowly and straight.

Adequate tightening torque 0.5 to 0.6 Nm Tool: Flathead screwdriver Blade edge thickness: 0.6 mm, full width: 3.5 mm [Recommended screwdriver: PHOENIX CONTACT screwdriver model SZS 0.6 3.5] Electric wire covering stripped length 7 mm

Electric wire terminal treatment: For a solid wire, the electric wire can be connected with the covering stripped. For a twisted wire, strip the covering, twist the core, and then insert it into the junction area. Make sure that the core filler does not short neighboring electrodes. Do not solder plate the core. The following pin terminals (crimp terminals) are also commercially available.

Rod terminal for one-wire connection PHOENIX CONTACT A series (with no insulation sleeve) Wire cross-sectional area of 0.25 mm2 : A 0.25 - 7 (product No.: 3202478) (*5) Wire cross-sectional area of 0.5 mm2 : A 0.5 - 8 (product No.: 3202481) (*5) Wire cross-sectional area of 0.75 mm2 : A 0.75 - 8 (product No.: 3202504) (*5) Wire cross-sectional area of 1 mm2 : A 1 - 8 (product No.: 3202517) (*5) Wire cross-sectional area of 1.5 mm2 : A 1.5 - 7 (product No.: 3200263) Wire cross-sectional area of 2.5 mm2 : A 2.5 - 7 (product No.: 3200289) *5. With A 0.25 - 7 to A 1 - 8, two wires can be inserted to the connector.

A I series (with insulation sleeve) Wire cross-sectional area of 0.25 mm2 : A I 0.25 - 8 YE (product No.: 3200852) Wire cross-sectional area of 0.5 mm2 : A I 0.5 - 8 WH (product No.: 3200014) Wire cross-sectional area of 0.75 mm2 : A I 0.75 - 8 GY (product No.: 3200519) Wire cross-sectional area of 1 mm2 : A I 1 - 8 RD (product No.: 3200030) Wire cross-sectional area of 1.5 mm2 : A I 1.5 - 8 BK (product No.: 3200043) Wire cross-sectional area of 2.5 mm2 : A I 2.5 - 8 BU (product No.: 3200522)

Rod terminal for two-wire connection PHOENIX CONTACT A I - TWIN series (with insulation sleeve) Wire cross-sectional area of 0.5 mm2 2 : A I - TWIN 2 0.5 - 8 WH (product No.: 3200933) Wire cross-sectional area of 0.75 mm2 2 : A I - TWIN 2 0.75 - 8 GY (product No.: 3200807) Wire cross-sectional area of 1 mm2 2 : A I - TWIN 2 1 - 8 RD (product No.: 3200810) Wire cross-sectional area of 1.5 mm2 2 : A I - TWIN 2 1.5 - 8 BK (product No.: 3200823)

Removable connector

14

[Wiring for products with CC-Link communication]

CC-Link communication terminals DA, DB, DG, and SLD are included with CC-Link communication MDUs. Connect these to the CC-Link transmission line. Never connect non-transmission line terminals (such as the L1 and L2 control power supply terminals). The CC-Link transmission line forms a small-signal circuit. Connecting it improperly is extremely dangerous.

The CC-Link transmission line forms a small-signal circuit. Install it at least 10 cm away from strong circuits. Allocate a distance of 30 cm or more in the case of connection in parallel for a long distance.

Caution

Danger

[Wiring for products with electric energy pulse output]

The 114 and 113 terminals for pulse output use are available on the MDU that has the electric energy pulse output function. The pulse output line forms a small-signal circuit. Install it at least 10 cm away from strong circuits. The wiring length is determined by various conditions such as the anti-noise performance of the pulse receiver. However, the wiring should not exceed 100 m. If using A/C for the pulse output power supply, make sure that the pulse receiver does not erroneously operate due to leak current caused by conduit capacitance.

Caution

Caution The products listed in page 13 may not be compatible with some electric wires. For details, contact the pin terminal (crimp terminal) manufacturer directly. However, if using a pin terminal (crimp terminal) with a metallic portion longer than 7 mm, cut the metallic portion to 7 mm as shown in the figure below.

After wire connection, attach the removable connector and tighten the screws. The adequate tightening torque is 0.2 to 0.3 Nm.

Tighten the (two) screws. (Tightening torque: 0.2 to 0.3 Nm)

Pin terminalMetallic portion

7 mm Cut here.

15

6. MDU Features and Functions 6.1 Features of MDU

6.2 Functions of MDU

The load current, line voltage, harmonic current (fundamental frequency; 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th order; and total), electric power, reactive power, electric energy, reactive energy, power factor, and frequency flowing to MDU Breaker can be measured and displayed. When MDU Breaker is tripped, the fault cause and fault current are stored in non-volatile memory. This information can be used to identify

fault causes and recover. The maximum value of measurement items such as demand current and time electric energy is stored in non-volatile memory, along with when the

maximum value occurred. This information can be used to identify peak energy usage times. The LCD backlight color changes from white to red when an alarm (such as PAL, OVER) or fault occurs, allowing users to notice abnormalities even from far away. Data such as measurement values, maximum values (and maximum value occurrence times), fault causes, fault current, and the alarm

status can be sent over a field network (CC-Link). Some models do not measure or display (transmit) some items. These items and functions will be skipped.

Caution *1. Refer to 6.3 Measurement functions for details of measurement functions. *2. Either the latest fault cause or the latest fault current is shown. They are not displayed simultaneously. *3. Electric energy pulse output and CC-Link communication cannot be installed at the same time. *4. The CC-Link version is CC-Link Ver. 1.10.

During MDU panel installation, a CC-Link cable (part no. FANC-110SBH manufactured by Kuramo Electric Co., LTD.) is used from the front surface of the MDU to the terminal block on the rear surface.

*5. When the MDU control power supply is turning on, a transitional inrush current will be generated. (Inrush current maximum value 2 A, energization time 1 ms [240 VAC].)

*6. Refer to 4.1 Contact capacity and combinations for alarm contact output in MDU Breaker Instruction Manual for Main Unit for alarm contact output combinations.

Measurement functions

(*1)

Load current I

Line voltage V

Harmonic current IH

Electric Power P

Reactive power Q

Electric energy EP

Reactive energy EQ

Power factor PF

Frequency Hz

(*2)

Fault cause, Fault current

Long time delay

Short time delay

Instantaneous

Line system 33W, 13W (applied to three-pole products), 34W (applied to four-pole products)

Output specifications

(*3)

No transmission (standard product)

Electric energy pulse output (option)

CC-Link communication (option) (*4)

MDU control power supply (permissible voltage range 85% to 110%)

Alarm contact (MDU Breaker main unit option) (Refer to 6.4 Monitoring functions) (*6)

100 to 240 VAC/DC common 12 VA (*5)

PAL, TI

16

6.3 Measurement functions 6.3.1 Measurement function list

Measurement elements

Present value

Present demand value

All-phase demand maximum value

Maximum value between all wires Maximum value occurrence time between all wires

All-phase demand maximum value occurrence time

Present value

Present value

Demand value

Demand value

Demand value

Integrated value Latest one hour amount One hour amount maximum value Occurrence time of one hour amount maximum value Integrated value Latest one hour amount One hour amount maximum value Occurrence time of one hour amount maximum value

Fundamental frequency maximum value for all phase

Each-order maximum value for all phase Occurrence time of each-order maximum value for all phase

All-phase each-order content ratio All-phase total distortion ratio

Occurrence time of fundamental frequency maximum value for all phase

Present value

Maximum value occurrence time

Present value

Present value

Maximum value

Present value

Each-phase fundamental frequency Each phase, each order (3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th order) Total harmonic for each phase

Each-phase 0.0, 1.2 to 999.9, 1000 to 1600 A

00/01/01 00:00 to 99/12/31 23:59

Total harmonic (average value) Maximum phase Each-phase

Total harmonic for each phase Total harmonic maximum value for all phase Occurrence time of total harmony maximum value for all phase

Maximum value occurrence time Maximum value Present value

Maximum value occurrence time Maximum value

Maximum value

Present value

Total harmonic (average value) Between each line

Communication Display Display rauge*

The following table lists measurement elements and elements that can be communicated/displayed. Measurement elements that can be communicated and displayed

I Load current ( 1.0%)

V Line voltage ( 1.0%)

P Electric power ( 1.5%)

Q Reactive power ( 2.5%)

EP Electric energy ( 2.0%)

EQ Reactive energy ( 3.0%)

PF Power factor ( 5.0%) Hz Frequency ( 2.5%)

IH Harmonic current ( 2.5%)

Fault current ( 15%)

* The minimum value and the maximum value of the display range differ depending on the rated current of the MDU breaker. For details, refer to 6.3.2 Measurement rated values/measurement range and accuracy.

0.0, 1.2 to 999.9, 1000 to 1600 A

00/01/01 00:00 to 99/12/31 23:59

0.0, 22.0 to 99.9, 100 to 759 V

00/01/01 00:00 to 99/12/31 23:59

-2103 to -1000, -999.9 to 999.9, 1000 to 2013 kW

00/01/01 00:00 to 99/12/31 23:59

-2103 to -1000, -999.9 to 999.9, 1000 to 2013 kver

00/01/01 00:00 to 99/12/31 23:59 0.0 to 99999.9 kWh250 A frame 0 to 999999 kWh 400/800 A frame

00/01/01 00:00 to 99/12/31 23:00 0.0 to 99999.9 kverh250 A frame 0 to 999999 kverh 400/800 A frame

00/01/01 00:00 to 99/12/31 23:00 LAG 50.0 to LAG 99.9, 100.0, LEAD 99.9 to LEAD 50.0% 00/01/01 00:00 to 99/12/31 23:59

0.0, 45.0 to 65.0 Hz

0.0, 2.5 to 99.9, 100 to 800 A

00/01/01 00:00 to 99/12/31 23:59 0.0, 2.5 to 99.9, 100 to 800 A 00/01/01 00:00 to 99/12/31 23:59

0.0, 2.5 to 99.9, 100 to 800 A

0 to 12800 A

0.0 to 99.9, 100%

17

6.3.2 Measurement rated values/measurement range and accuracy

Electric current total present value

I3

(I1 + I3) / 2

(I1 + I2 + I3) / 3

Maximum phase applicable phase

I3

I1, I3

I1, I2, I3

I1, I2, I3, IN

Line system

Single-phase 2-wire

Single-phase 3-wire

Three-phase 3-wire

Three-phase 4-wire

Rated current In (A)

Accuracy ( 1.0% of In) (*)

Measurement lower limit current (1% of In)

Measurement upper limit current (In 2)

400

4.0 A

4.0 A

800 A

630

6.3 A

6.3 A

1260 A

800

8.0 A

8.0 A

1600 A

Setting value

0 to 15 min. (per 1 min.)

Item

Demand time limit

Display

Blinks at measurement upper limit current Fixed at measurement upper limit current

Communication

0 ALess than 1% of In

Measurement upper limit current exceeded

(1) Electric current [1] The present value is the effective value during a single cycle. [2] Each-phase means the 1-, 2-, 3-, and N-phase. [3] Totals (average value) are calculated as follows when setting the phase and wire (factory setting is three-phase three-wire for three-pole products, and three-phase four-wire for four-pole products). The present value of the maximum phase electric current and present value of the maximum phase electric current demand indicate the maximum value of the following phases via setting the phase and wire.

[4] The electric current demand time limit can be set as follows. The demand time limit is a bulk setting value that includes other measurement elements. (Factory setting is two min.)

[5] The all-phase demand maximum value indicates the maximum value of the demand value for all phases, from when usage began (after previous reset) to now. [6] The electric current measurement rated value, measurement range, and measurement accuracy are shown below.

[7] Display/communication values will be as follows in the following conditions.

* The measurement accuracy is the ratio versus In, regardless of the rated voltage.

Current setting Ir (A) 200-400 adjustable 300-630 adjustable 400-800 adjustable

18

Display

Blinks at 759 V Fixed at 759 V

Communication

0 VLess than 22 V

Measurement upper limit voltage exceeded

[6] Display/communication values will be as follows in the following conditions.

440 V

80 V (displays up to 22 V, but anything less than 80 V is a reference value)

759 V

4.4 V ( 1.0% of measurement rated voltage)

Measurement lower limit voltage

Measurement upper limit voltage

Measurement rated voltage

Accuracy

(2) Voltage

[4] The maximum value between all wires indicates the maximum value of all line voltages, from when usage began (after previous reset) to now. [5] The voltage measurement rated value, measurement range, and measurement accuracy are shown below.

[1] The present value is the effective value during a single cycle. [2] Between each line means the between phases, such as between 1-phase and 2-phase, 2-phase and 3-phase, 3-phase and 1-phase, 1-phase and N-phase, 2-phase and N-phase, and 3-phase and N-phase. [3] Totals (average value) are calculated as follows when setting the phase wire type. (Factory setting is three-phase three-wire for three-pole products, and three-phase four-wire for four-pole products.) The maximum value between all wires indicates the maximum value of the following interphases via setting the phase and wire.

Setting value

0 to 15 min. (per 1 min.)

Item

Demand time limit

400 630 800Rated current In (A) Measurement upper limit electric power Measurement lower limit electric power Measurement upper limit reactive power Measurement lower limit reactive power

1,052 kW -1,052 kW 1,052 kvar

-1,052 kvar

1,656 kW -1,656 kW 1,656 kvar

-1,656 kvar

2,103 kW -2,103 kW 2,103 kvar

-2,103 kvar

(3) Electric power/Reactive power [1] The present value is the effective value during a single cycle. (The electric power during reverse power flow is also measured.) [2] The demand time limit is a bulk setting value that includes other measurement elements. (Factory setting is two min.)

[3] The measurement rated electric power/reactive power, measurement range, and measurement accuracy are shown below.

If either the load current or line voltage exceeds the measurement upper limit, this will be the upper limit (lower limit) even if at or below the electric power/reactive power listed above.

3 In 440 V

Measurement rated electric power 1.5%

Measurement rated reactive power 2.5%

Measurement rated electric power

Measurement rated reactive power

Electric power accuracy

Reactive power accuracy

Measurement upper limit Measurement lower limit

Note: The display value will also blink if either the load current or line voltage reaches the measurement upper limit value.

[4] Display/communication values will be as follows in the following conditions.

Display

0 kW / 0 kvar

Blinks at measurement lower limit electric power/reactive power

Communication

Fixed at Measurement lower limit electric power/reactive power

All I are less than 0.4% of In

All V are 0 V (less than 22 V)

Less than measurement lower limit electric power/reactive power

Blinks at measurement upper limit electric power/reactive power

Fixed at measurement upper limit electric power/reactive power

Measurement upper limit electric power/reactive power exceeded

Voltage total present value

V23

(V12 + V23) / 2

(V12 + V23 + V31) / 3

Maximum phase applicable phase

V23

V12, V23

V12, V23, V31

Line system

Single-phase 2-wire

Single-phase 3-wire

Three-phase 3-wire

Three-phase 4-wire

19

2.0% of actual value for V (100 V to 440 V) I (5 to 100% of In) (PF = 1) 2.5% of actual value for V (100 V to 440 V) I (5 to 100% of In) (PF = 0.5)

3.0% of actual value for V (100 V to 440 V) I (10 to 100% of In) (PF = 0)

0 to 99999.9 kWh/kvarh (250 A frame) 0 to 999999 kWh/kvarh (400/800 A frame)

Electric energy accuracy

Range

The electric energy and reactive energy are measured if the electric current measurement value is around 0.4% or higher. If this exceeds 999999 kWh/kvarh addition will continue with the value reset to 0 kWh/kvarh.

(4) Electric energy/Reactive energy [1] The integrated value is the cumulative total value, from when usage began (after previous reset) to now. (The electric energy during reverse power flow is not added.) [2] The electric energy and reactive energy can be set to any value. [3] The latest one hour amount is the one hour amount from one hour to the next hour as measured by the internal clock. (It is the latest one hour amount only.) [4] The one hour amount maximum value is the maximum value of the latest one hour amount, from when usage began (after previous reset) to now. [5] The measurement range and measurement accuracy for the electric energy and reactive energy are shown below.

2.5% of actual value

0.0, 45.0 to 65.0 Hz

Accuracy

Range

(6) Frequency [1] The measurement accuracy and measurement range for the frequency are shown below.

Display

0.0 Hz

Communication

V12 and V32 are 0 V (less than 22 V)

Less than 45 Hz

65 Hz exceeded

Blinks at 45.0 Hz

Blinks at 65.0 Hz

Fixed at 45.0 Hz

Fixed at 65.0 Hz

[2] Display/communication values will be as follows in the following conditions.

5% for an electric angle of 90

Display

LEAD (forward) 50% to 100% to 50% LAG (delay) forward displays LEAD while delay displays LAG

Communication

LEAD (forward) 0% to 100% to 0% LAG (delay) forward is a negative value (values under 50% are reference values)

Power factor is measured for all phases combined. If 0 A is displayed because the electric current measurement value for a 1-phase was cut-off for the load current near cut-off, the measurement error could increase.

Accuracy

Range

[3] Power factor sizes are shown below.

(5) Power factor [1] The measurement accuracy and measurement range for the power factor are shown below.

100.0%-50.0% 50.0%

LEAD LAG

[2] Display/communication values will be as follows in the following conditions.

Display

100%

Communication

I1, I2 and I3 are 0 A (less than 1.0% of In)

V12 and V32 are 0 V (less than 22 V)

P is 0 kW

Blinks at 50%PF exceeds measurement range

LargeSmall

Reactive energy accuracy

20

(7) Harmonic current [1] The present value is the effective value during a single cycle. [2] The present harmonic current value measures the fundamental frequency and order (3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th) of each phase (1-phase, 2-phase, 3-phase, N-phase). [3] Each-phase total present harmonic current value is the total value of the harmonic components for the 3rd, 5th, 7th...17th, and 19th orders (excluding fundamental frequency components). The calculation formula is shown below.

Setting value

0 to 15 min. (per 1 min.)

Item

Demand time limit

(Each-phase IH (ALL) / each-phase IH (1st)) 100

(Each-phase IH (3rd), IH (5th),IH (19th) / each-phase IH (1st)) 100

Each-phase total distortion ratio (%)

Each-phase 3rd, 5th...19th order content ratio (%)

400

15.8

12.6

630

800

Accuracy ( 2.5% of In) (A) (*)

Measurement lower limit current (2% of In) (A)

Measurement upper limit current (In 1) (A)

10.0

8.0

400

630

20.0

16.0

800

Rated current In (A)

400

6400

15% of actual value

630

10080

800

12800

Rated current In (A)

Accuracy

Measurement upper limit fault current (A) (In 16)

[4] The all-phase each-order maximum value indicates the maximum value of the present harmonic current values for all phases, from when usage began (after previous reset) to now. [5] The demand time limit is a bulk setting value that includes other measurement elements. (Factory setting is 2 min.)

[6] Each-phase total distortion ratio and each-phase order (3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th) content ratio are values calculated as follows.

IAH= IH3 2 + IH5

2 + IH7 2 + IH17

2 + IH19 2

(8) Fault current [1] The fault current measures the overload/short circuit current. [2] The measurement accuracy and measurement range for the overload/short circuit current are shown below.

[7] The harmonic current measurement rated value, measurement range, and measurement accuracy are shown below.

[8] Display/communication values will be as follows in the following conditions.

[3] When a fault occurs, the measurement value blinks even if the fault current do not exceed the measurement upper limit value. (Fault cause/fault current display mode) When the fault current exceeds the measurement upper limit value, the measurement value blinks even if the fault display mode is released.

* The measurement accuracy is the ratio versus In, regardless of the rated voltage.

Display

Blinks at measurement upper limit electric current value

Measurement upper limit electric current value fixed

Communication

0 ALess than 2% of In

Measurement upper limit current exceeded

21

6.4 Monitoring functions 6.4.1 Monitoring function list

Monitoring element

Fault cause

Electric current demand upper/lower limit alarm

Neutral line open phase alarm NLA (*2)

*1. Trip frequency and open/close frequency are enabled when MDU transmission alarm switch (option) and MDU transmission auxiliary switch (option) are installed, respectively.

*2. This function is turned ON when the line system is set to single-phase three-wire system. (The function is turned OFF when set to any other line system.)

Load current pre-alarm PAL

Overcurrent alarm OVER

Electric current demand alarm IDM_AL

Electric current unbalance alarm IUB_AL

Electric current open phase alarm ILA_AL

Long time delay

Short time delay

Instantaneous

Open/close frequency

Trip frequency

Display

Communication

MDU Breaker alarm

MDU Breaker status (*1)

The following table shows monitoring elements, along with elements that can be displayed on the display or communicated. Display indicates that the item is displayed on the display. Communication indicates that the item can be communicated through CC-Link communication.

22

6.5 How to use monitoring functions 6.5.1 MDU Breaker alarms

The alarm is output to display/over communication when the load current the pre-alarm current, and the duration the pre-alarm operating time (1/2 the long time delay operating time (TL)).

No settings. (The pick up value set on the MDU Breaker main unit.)

Set to either self-hold or automatic reset via communication or on the display.

Reset the alarm via communication or on the display. Reset method

Self-hold

Automatic reset Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

The alarm is output to display/over communication when the load current exceeds 105 to 125% of the current setting of the circuit breaker.

No settings.

Automatic reset. (No settings.) Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

(1) PAL (load current pre-alarm)

(2) OVER (overcurrent alarm)

The alarm is output to display/over communication when the electric current demand value (*) exceeds the pick up current.

Set via communication or on the display Function: ON/OFF Pick up current: 50 to 100% (per 1%) Demand time limit: 1 to 10 min. (per 1 min), 15, 20, 25, 30 min. (*) (Factory setting is OFF.)

Set to either self-hold or automatic reset via communication or on the display.

Reset the alarm via communication or on the display. Reset method

Self-hold

Automatic reset Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

(3) IDM_AL (electric current demand alarm)

* This differs from the demand time limit for each measurement value.

For automatic reset, the alarm will be reset if the value falls below the pick up current. For self-hold, the alarm will be maintained and will need to be reset manually.

Alarm generated

Pick up current

Alarm reset

Time

Measurement value

23

Monitoring starts when the load current for any phase reaches or exceeds 10% of the measurement rated current. The alarm is output to display/over communication when an energization phase equal to or less than the maximum phase current 10% is generated when monitoring starts and after 30 seconds have passed.

Set via communication or on the display Function: ON/OFF (Factory setting is OFF.) Pick up current: 10% fixed (no settings) Operating time: 30 s fixed (no settings)

Set to either self-hold or automatic reset via communication or on the display.

Reset the alarm via communication or on the display. Reset method

Self-hold

Automatic reset Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

(4) ILA_AL (electric current open phase alarm)

Monitoring starts when the load current for any phase reaches or exceeds 10% of the measurement rated current. The alarm is output to display/over communication when an energization phase equal to or less than the maximum phase current 30% is generated when monitoring starts and after 30 seconds have passed.

Set via communication or on the display Function: ON/OFF (Factory setting is OFF.) Pick up current: 30% fixed (no settings) Operating time: 30 s fixed (no settings)

Set to either self-hold or automatic reset via communication or on the display.

Reset the alarm via communication or on the display. Reset method

Self-hold

Automatic reset Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

(5) IUB_AL (electric current unbalance alarm)

Monitoring starts

Maximum phase current

Measurement rated current 10%

Electric current open phase alarm generated

30 s elapsed

Maximum phase current 10%

I1 I2

I3

Time

Measurement value

Monitoring starts

Maximum phase current

Measurement rated current 10%

Electric current unbalance alarm generated

30 s elapsed

Maximum phase current 30%

I1 I2

I3

Time

Measurement value

24

Communicates the total number of times the MDU Breaker has tripped from when usage began to now.

Communicates the total number of times the MDU Breaker has opened/closed from when usage began to now.

MDU Breaker status details

Trip frequency

Open/close frequency

Remarks

Fault cause details Outputs to display/over communication the fault cause when MDU Breaker is tripped.

Communicates/displays either long time delay (LTD), short time delay (STD), or instantaneous (INST).

Lower limit alarm generated

Lower limit alarm recovers

Upper limit alarm generated

Upper limit alarm recovers

Upper limit value

Lower limit value

Time Time

Measurement value

Measurement value

6.5.2 MDU Breaker status

6.5.3 Fault causes

Upper/lower limit alarm

An alarm generation status is communicated if the electric current demand (current value of maximum phase electric current demand) exceeds the set upper limit value or falls below the set lower limit value. (It is not output to the display.)

Sets the upper limit setting value and lower limit setting value via communication. (Cannot be set on display.)

Upper limit setting value Sets the upper limit for the measurement value.

Sets the lower limit for the measurement value.Lower limit setting value

Upper limit monitoring

Lower limit monitoring

Monitoring Type

Generation

Recovery

Generation

Recovery

Alarm generation condition

Measurement value > upper limit setting value

Measurement value upper limit setting value

Measurement value < lower limit setting value

Measurement value lower limit setting value

Automatic reset. (No settings.) Automatically resets when the cause of the alarm is removed.

Alarm generation status Shows whether an alarm has been generated.

Setting method

Alarm generation condition

Reset method

6.5.4 Electric current demand upper/lower limit alarms

The following internal accessory devices are required to measure the trip frequency and open/close frequency. Measure trip frequency: MDU transmission alarm switch Measure open/close frequency: MDU transmission auxiliary switch Measure both trip frequency and open/close frequency: MDU transmission alarm switch/auxiliary switch

25

6.5.5 Neutral line open phase alarm (NLA) The alarm generation status is displayed when the line voltage rated operation overvoltage, and the duration operating time. (It is not communicated.)

Set via communication or on the display

Set to either self-hold or automatic reset via communication or on the display.

Reset the alarm via communication or on the display. Reset method

Self-hold

Automatic reset Automatically resets when the cause of the alarm is removed.

Alarm details

Setting method

Reset method

Rated operation overvoltage:

Operating time:

Rated inoperative overvoltage:

Overvoltage inertia inoperative time:

135 VAC fixed (no settings)

1 s fixed (no settings)

120 VAC

0.1 s or more

6.6 Electric energy pulse output/CC-Link communication section specifications 6.6.1 Electric energy pulse output

6.6.2 CC-Link communication

This function is turned ON when the line system is set to single-phase three-wire system. (The function is turned OFF when set to any other line system.)

Item

Output elements

Contact capacity

Output pulse unit

Output pulse width

Max. wiring length

Solid state relay (SSR), No voltage a contact (113 and 114 terminals: no polarity)

Compatible with 24 VDC and 100 to 200 VAC, 20 mA

1, 10, 100, 1000 and 10000 kWh/pulse (settable)

0.35 to 0.45 s

100 m

Specification

Item Specification

Communication method

Communication speed

Synchronization method

Encoding method

Transmission format

Number of occupied stations

CC-Link version

Max. total extension cable length

Number of connected units

Connecting cable

Broadcast polling method

156 k/625 k/2.5 M/5 M/10 Mbps

Frame synchronization method

NRZI

Conforming to HDLC

Remote device occupying 1 station

CC-Link Ver. 1.10

1200 m (156 kbps), 900 m (625 kbps), 400 m (2.5 Mbps), 160 m (5 Mbps), 100 m (10 Mbps)

Max. 42

Cables applicable to CC-Link Ver. 1.10 (shielded 3-core twisted pair cables)

Note: Refer to the CC-Link Partner Association website (http://www.cc-link.org/) for details.

26

7.1 Display/operation panel Measurement values, alarms, setting values, etc. are displayed to allow you to make settings.

(1) Display Measurement values, alarms, setting values, etc. are displayed. In the display, the direction of display can be changed in accordance with the installation direction. Refer to 9.6.3 Setting method for LCD.

(2) Operation switch area Use the switches to switch and set measurement values. To switch screens and perform screen operations, use these upper (UP), lower (DOWN), left (RETURN), right (SELECT) and center (ENTER) switches. The switches are in the four directions, and there is the center switch.

7.2 Terminal area

Control power FG

Load side terminal (Removable connector)

Control power L2

Control power L1

MDU Pulse CC-Link

*In the figure, the terminal cover and the connector cover are removed. *In the case of no-transmission specification, the load side terminal is not provided.

Terminal layout chart

[1] - - - - SLD DG DB DA-

- 113 114 [2] [3] [4] [5] [6]

Do not connect anything to unused terminals. Do not use such terminals for connecting. The MDU may break down if unused terminals are connected for use.

Caution

Operation switch area

MDU

Display Terminal cover

Connector cover

Operation switch area

ENTER (Center)

SELECT (Right)

RETURN (Left)

UP (Up)

DOWN (Down)

7. Names and Functions of MDU Parts Some items or functions are not measured or displayed (transmit) depending on models or specifications. These items and functions will be skipped. * Refer to 9. MDU Operation Procedure for details.

(1) Control power supply terminals L1, L2 Connect to the MDU control power supply. They have no polarity.

(2) Grounding terminal FG Ground the FG terminal of the MDU as class D grounding.

(3) Pulse output terminals 114, 113 (with power pulse output option) These are power pulse output terminals. They have no polarity.

(4) CC-Link communication terminals DA, DB, DG, SLD (with CC-Link communication option) Connect to CC-Link communication signals DA, DB, DG, SLD.

27

Reset switch

CC-Link communication LEDs L RUN L ERR. SD RD

Station number setting switch Communication speed setting switch

7.3 CC-Link setting area (with CC-Link communication option) The MDU is a remote device station that occupies a single station. MDU input data is retained if a sequencer CPU error or data ring error occurs.

ON ON ON

ON

Station number setting switches8 4 2 1

1 8 4 2 1

10

Setting example: Value of switches when turned ON: 10s place......2 10 = 20, 1s place......8 1 + 1 1 = 9, 20 + 9 = 29, and then station number is 29.

Configure so that there are no duplicate station numbers configured on the same transmission route. Refer to 7.4 Number of CC-Link communication connectable units and precautions for information on the number of connectable units and combinations with other devices.

(2) Communication speed (baud rate) setting switch Use the communication speed setting switch to set the communication speed.

0 1 2 3

4

Switch setting Communication speed

156 kbps (factory setting) 625 kbps 2.5 Mbps 5 Mbps

10 Mbps 5 to 9 Setting error (Turn ON L ERR. LED when the error occurs)

Communication speed setting switch

(3) Reset switch The reset switch restarts the MDU status. If the station number (STATION No.) setting switches or communication speed (baud rate) setting switch are operated after the control power supply is turned on, be sure to press the reset switch.

(4) CC-Link communication LEDs The CC-Link communication LEDs indicate the status of the transmission signal line and the error status of the MDU.

LED name

L ERR. LED

SD LED RD LED

L RUN LED

Details

ON: Communication normal OFF: Communication stopped ON: Communication data error Blinking: Communication data error OFF: Communication normal Turns ON when sending data Turns ON when receiving data

(1) Station number (STATION No.) setting switches Open the cover for the setting area on the front of the MDU, and use the station number setting switches to set the CC-Link communication station number via BCD code. (Setting range: 1 to 64) (factory setting: 1)

Caution CC-Link operation precautions

[1] Prior to powering the transmission line for CC-Link communication, set the station number for each device, while keeping the number of occupied stations in mind. CC-Link devices use these station numbers to communicate, so configuring them is very important.

[2] Use a thin stick to operate the station number setting switches, and make sure that they have been switched all the way to the number to set. Operate the station number configuration switches at 10 N or less.

[3] If the station number setting switches are operated after turning the control power supply on, the set station number will not be recognized unless the reset switch is pressed.

[4] Use a thin stick to firmly press the reset switch. [5] Do not use a mechanical pencil to operate the switch. The lead could enter the gap in the switch, resulting in erroneous operation and even

causing accident.

28

7.4 Number of CC-Link communication connectable units and precautions The MDU is a remote device station that occupies a single station. The number of connectable units and combinations with other devices must satisfy both number of connectable units in condition 1 and number of connectable units in condition 2 below.

Number of connectable units in condition 1 {(1 a) + (2 b) + (3 c) + (4 d)} 64

a : Number of units occupying one station (this applies to the MDU) b : Number of units occupying two stations c : Number of units occupying three stations d : Number of units occupying four stations

Number of connectable units in condition 2 {(16 A) + (54 B) + (88 C)} 2304

A : Number of remote I/O single stations 64 B : Number of remote device stations 42 (this applies to the MDU) C : Number of local stations 26

If only MDUs are connected, up to 42 devices can be connected. Number of connectable units in condition 1...... {(1 42) + (2 0) + (3 0) + (4 0)} = 42 64 Number of connectable units in condition 2...... {(16 0) + (54 42) + (88 0)} = 2268 2304

29

7.5 Installation and wiring for products with CC-Link communication 7.5.1 Terminator installation

Terminators are not included with this product. Use the terminator included with the master unit. Refer to the terminator manual included with the master unit for details on terminators.

Terminators (included with the master unit) must be installed on the units at both ends of the CC-Link transmission line.

Master unit MDU MDU

Special CC-Link cable

Cut

Cut Cut

15 mm

5 mm 5 mm 5 mm 5 mm10 mm 10 mm

15 mm

Cut

Special CC-Link cable

7.5.2 Shielded wire grounding Connect both ends of the shielded wires from the special CC-Link cable to SLD on each unit. Use FG on each unit as the dedicated ground. Use class D grounding. If a dedicated ground cannot be used, use a common ground as shown in the figure below.

If the MDU is at the end of the CC-Link transmission line, connect a terminator between DA and DB in the MDU terminal block. Prepare the terminator included with the master unit as shown in the figure below.

[Preparation method] (1) Cut the resistor legs on both sides of terminator (leave 15 mm on each side).

(2) Cut the insulation tubes 5 mm from their ends.

Te rm

in at

or

Terminator DA

DB

DG

SLD

FG

DA

DB

DG

SLD

FG

DA

DB

DG

SLD

FG

MDU

Dedicated ground ...... Best Common ground ...... OK Common ground ...... Not possible

Class D groundClass D groundClass D ground

MDU MDU MDU MDU MDU

Caution

Terminator (included with master unit)

Insulation tubes

Crimp terminals with insulation sleeves

30

8. MDU Detailed Specifications 8.1 Precautions for measurement

Measurement value

4.0 A

4.0 A

4.0 A

Permissible error range

0 A 400 A Input value

to (time limit) t (Time)

Io

0.95 I I

(2) Demand value The demand value is generally the average value over the demand time limit. The demand time limit (to) is the time until the measurement display value (lo) when a fixed input (I) is continuously powered displays 95% of the input (I). It will take an amount of time roughly equal to three times the time limit (to) to display 100% of the input (I).

(3) Power factor measurement accuracy The MDU power factor measurement accuracy is 5% for an electric angle 90. This is phase angle 4.5. With regard to power factor this means that a display value up to around 0.3% (LEAD (forward) 99.7 to LAG (delay) 99.7) at 100% and around 6% (64.9 to 76.0) at 70.7% of LEAD or LAG will be allowed.

Measurement display value

45-45 0

Power factor

-99.7% 100%

+99.7% Permissible error range

-70.7% 76.0%

70.7%

64.9%

4.5 4.5

5% of 90

Permissible error range

Forward (LEAD) Delay (LAG)

(1) Electric current measurement accuracy The MDU electric current measurement accuracy is 1.0% of the maximum current setting (measurement rated current) of the circuit breaker. For example, the permissible difference of NF400-SEW with MDU is 4.0A (400 A 1.0%), so the permissible difference from a current of 0 A to 400 A would be 4.0 A. If the measurement value is less than 1.0%, the display value is cut off to 0 A. However, if the current is 0.4% or more of the rated value, the electric power and electric energy are measured.

31

(4) Intermittent load (such as welder) measurement Items such as current, voltage, and electric power are measured (sampled) once every 250 ms. Any values, such as current value, are calculated

and the measurement value is updated at this timing. However, the minimum update cycle for measurement results displayed on the display or output over communication data is 500 ms. This will result in a larger errors if there is a continuous load (such as due to a resistance welder), and is therefore not suited for measurement in such cases. If a subordinate circuit breaker operates during a short or earth leakage, the operating current might be measured at a low value. Fault current is continuously monitored. However, the operating current of the MDU Breaker itself is measured, so the operating current of a subordinate circuit breaker cannot be measured.

(5) Operation during power outage/restoration The electric energy (integrated value) and reactive energy (integrated value) are stored in non-volatile memory when measurement values

are updated or there is a power outage. When power is restored, it will continue measuring from the data that was stored prior to the power outage. Setting values are stored in non-volatile memory when set, so they do not need to be set again when power is restored. The device stores the last measurement display screen status prior to a power outage, and will return to this screen when the power is restored. The time setting might not be retained during a power outage. It should be reconfigured when power is restored. This setting is required to

measure the maximum value occurrence time and latest one hour amount (the one hour amount from one hour to the next hour as measured by the internal clock).

Maximum values and occurrence times are stored every 30 minutes. If there is a power outage, the data from 30 minutes prior to the power outage until the power outage may not be stored (in the worst case scenario).

32

9.1 Operating method for main menu screen The main menu screen provides access to each display screen. Use the UP/DOWN switches to select a screen to display/set, and then press ENTER to switch to the selected screen. * Text will be inverted (black background and white text) when selected.

[Main menu screen]

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

[Protection characteristic display screen] This is used to check overload, short-circuit protection characteristics, current setting, long time delay operating time, short time delay tripping current, short time delay operating time, and instantaneous tripping current.

[Fault/alarm display screen] Fault cause/current The screen displays the alarm status.

[Reset screen] This is used to delete fault causes/currents and to reset alarms, maximum values, electric energy and reactive energy.

[Setting menu screen] This is used to configure phase switching, demand limit time, line system setting, pulse unit setting, alarm setting, various LCD settings, clock setting, and electric energy/reactive energy setting.

Select this item to display measurement values. Refer to section 9.2.

Select this item to display and set protection characteristics. Refer to section 9.3.

Select this item to display the alarm status. Refer to section 9.4.

Select this item to make reset operations. Refer to section 9.5.

Select this item to make settings. Refer to section 9.6.

DOWN UP

DOWN UP

DOWN UP

DOWN UP

9. MDU Operation Procedure To set the display items and functions, use the operation switches as shown in the figure below. Some models do not measure or display (transmit) some items or functions. These functions and items will be skipped.

ENTER (Center)

SELECT (Right)

RETURN (Left)

UP (Up)

DOWN (Down)

* If having returned to the measurement value display screen after shifting from the measurement value display screen to the main menu screen, the screen will return to that shown before the shift to the main menu.

[Measurement value display screen] The screen displays the electric energy/compound (current), current, voltage, electric power, reactive power, power factor, frequency, present harmonic current, harmonic current content ratio, maximum harmonic current, harmonic current demand, and reactive energy. T I N G

S E T

O T E C T

RT L

R

R E

S E T

TM EE

P R

NM A I

/ AI P

M A I N

M E T E R

P R O T E C T

T R I P / A L

R E S E T

S E T T I N G

M A I N

M E T E R

P R O T E C T

T R I P / A L

R E S E T

S E T T I N G

M A I N

M E T E R

P R O T E C T

T R I P / A L

R E S E T

S E T T I N G

M A I N

M E T E R

P R O T E C T

T R I P / A L

R E S E T

S E T T I N G

33

9.2 Measurement value display and display contents Select METER in the main menu screen. The measurement display screen can be opened with ENTER. The options switch with UP/DOWN as follows: EP I V P Q PF Hz HI (A) HI (%) HI (A) HI (A) EQ Seq EP.... Press RETURN to return to the main menu screen from each screen. * When the screen has shifted to the main menu screen and then shifted to the measurement value display screen again, the screen selected before the shift will be displayed.

SELECT

SELECTSELECT

SELECT SELECT

Current demand (Maximum phase)

Electric energyOccurrence date and time

Occurrence date and time

Demand time limit

(1) Electric energy/Compound (current + electric energy) Measured electric energy values and compound values (current + electric energy) are displayed. Use SELECT to switch display screens.

3.

hW

2

]

2 [ k

3464

[

24 A ]

a x e m

. P d

M D

EP

I ]W h

EP [ k

24364 0

EP D e m d [ k W h ]

9124 40476

: 0 02 0 / 0 57 / 0 21

h ][ k W m d xEP M a

D e

[Electric energy display screen]

SELECT

To [Present current display screen]

[Compound display screen]

[Maximum one-hour electric energy display screen]

[One-hour electric energy display screen]

(2) Current of each phase The measured current values of the phases are displayed. Use SELECT to switch display screens.

[Present current display screen]

[Present current demand display screen]

[Maximum all-phase demand display screen]

1-phase

2-phase

3-phase

N-phase

Only 4-pole product

EP : Electric energy I : Load current V : Line voltage P : Electric power Q : Reactive power PF : Power factor Hz : Frequency HI (A) : Harmonic current HI (%) : Harmonic current content rate EQ : Reactive energy Seq : Phase sequence display

SELECT

To [Electric energy display screen]

N

1 [

I

1

0

.7

2

3

A ]

2 .

2

243.2

49

8

.

11

8

1

.

]

1

9.4

I D e m d [ A

2 243. 2

2 1.1 3

2 0 N

7 D T = 1 min2 D T =

1.

m d x

[ ]A

I M a

1

2

D e

0 : 3

min

4

3

2

5

82

1 7 / 1 1 / 0

(3) Line voltage Measured line voltage values are displayed. Use SELECT to switch display screens.

[Present line voltage display screen]

[Maximum voltage display screen]

[Present voltage between N phase display screen]

* Skipped in the case of a 3-pole product.

SELECTSELECT SELECT

To [Present line voltage display screen] Between 1-2 phases

Between 2-3 phases

Between 3-1 phases

Between 1-N phases

Between 2-N phases

Between 3-N phases

Average value

Occurrence date and time

V

4.0

2

M a

V ]

7

1 3

x

2

[

/ 207 / 4 0 02 :

[ V

20.0 2-3

3-1

20.0

20.0

21.0

]

Avr

1-2

V

2-N

21.0

1-N V ]

3-N

[

V

20.0

20.0

34

(4) Electric power Measured electric power values are displayed. Use SELECT to switch display screens.

[Present electric power display screen]

[Present electric power demand display screen]

[Maximum electric power demand display screen]

(5) Reactive power Measured reactive power values are displayed. Use SELECT to switch display screens.

[Present reactive power display screen]

[Present reactive power demand display screen]

[Maximum reactive power demand display screen]

(6) Power factor Measured power factor values are displayed. Use SELECT to switch display screens.

[Present power factor display screen]

[Maximum power factor display screen]

SELECT

SELECT SELECT

SELECT SELECT

To [Present electric power display screen]

SELECT

To [Present reactive power display screen]

Occurrence date and time

Occurrence date and time

Occurrence date and time

Demand time limit

Demand time limit

LAG: Delay

LEAD: ForwardSELECT

SELECT

D e m d ][

100.3

D T = 1 2 min

k W

P

-

P k W ][

243.2

: 3 4

1.101

P D e m d M a x

k W ][

1 7 2 0

/ 501 1 /

D T = 1 2 min

]k v a r

Q [

312.

1 7 / 1 1 /

D T

:

Q M

[ k

a D

min

0 3 4 0

r

.0

v a e m d

2 5

= 1 2

]

x

9 0

= 1

v D e

]

Q [ k

m d

312.

D T

a r

2 min

[ % ]

E AL D

0 51 7 2

1 / 0 :

PF M a x

4.4

/ 1

7

3 4

88.0

PF [ % ]

L A G

(7) Frequency The present frequency is displayed.

Hz [ H z ]

60.1

[Present frequency display screen]

35

(8) Present harmonic current The total value of present harmonic current value of each phase, and the measurement values of fundamental frequency and each harmonic order are displayed. Use SELECT to switch display screens. Display switches as follows: Total value fundamental frequency (1st oder) 3rd order ... 19th order total value....

10.5

20.8 N

21.1 3

16.2 2

1 [ A ]

3 r dHI

50.8 N

25.1 3

22.2 2

11.5 1

[ A ] 1 s tHI

60.8

.1 N

2 3

35

54.

20 2

.5 1

[ A ] t o t a lHI

[Present harmonic current display screen ]

Only 4-pole product

Total value Fundamental frequency (1st order) 3rd order

HI 1 9 t h ][ A

1

2

4.2

.1 3

5 N

5

9.8

3.

19th order

(9) Harmonic current content rate The total value of harmonic current content rate of each phase, and the measurement value of each harmonic order are displayed. Use SELECT to switch display screens. Display switches as follows: Total value 3rd order ... 19th order 19 total value ....

8.

2

40

2

3

N

30 ]%[

1

H DTHI

1

0.

81.

5

.2 1

HI 3 r d [ % ]

30.5 2

.246 3

51.1 N

10.8 31.8

25.1 3

N

1 9 t hHI % ][

.5

24 2

11 1

.2

[Harmonic current content rate display screen ]

Total value 3rd order 5th order 19th order

HI 1

5

2

t h [

53 % ]

.5

43.2 3

.145 N

.840

SELECT

SELECT

SELECT

SELECT

SELECT SELECT

SELECT

SELECT

1-phase

2-phase

3-phase

N-phase

Only 4-pole product

1-phase

2-phase

3-phase

N-phase

SELECT

To [Present harmonic current display screen]

(10) Maximum harmonic current The maximum harmonic current and maximum value occurrence time of each harmonic order are displayed. Use SELECT to switch display screens. Display switches as follows: Fundamental frequency (1st order) 3rd order ... 19th order fundamental frequency (1st order)....

[Maximum harmonic current display screen]

Fundamental wave (1st order) 3rd order 19th order

SELECT

To [Harmonic current content rate display screen]

SELECT

To [Maximum harmonic current display screen]

Occurrence date and time

(11) Harmonic current demand value The harmonic current demand, the maximum harmonic current demand value and the occurrence time are displayed. Use SELECT to switch display screens.

[Harmonic current demand display screen]

[Maximum harmonic current demand display screen]

Only 4-pole product

1-phase

2-phase

3-phase

N-phase

Demand time limit

Occurrence date and time

SELECT

SELECT A ]

x m

M DHI e

a

[ d

4.027

1 7 / 1 / 0 5 2 0 : 3 4 1

D T = 1 2 min

.8 =

.203

40

HI 1

D e m d [ A ]

. 3

2

2

8

20.5

11

N

D T 1 min

2 0 : 3 4 1 7 1 / 0 5/ 1

24.01

[ A ]

x 3 r dHI M a

1 7 1 / 0 5 2 0 : 3 4

/ 1

00.02

A ][ 1 s t M a xHI

0 : 3 4 1 7 1 / 0 5/ 1

2

37.0

[ A ]

x 1 9 t hHI M a

36

(12) Reactive energy Measured reactive energy values are displayed. Use SELECT to switch display screens.

[Reactive energy display screen]

[One-hour reactive energy display screen]

[Maximum one-hour reactive energy display screen]

EQ [ k v a r h ]

2 9481

Seq

O ISP

E AGN

20

EQ [

D e k v a

m r

d h ]

184 34

0 : 0 01 0 / 1 01 7 / 1

507

a r h ][ k v

x D e m dEQ M a

Highlighted

SELECT SELECT

Occurrence date and time

(13) Phase sequence The phase sequence of the main circuit is displayed. (Enabled during three-phase, three-wire system. Displayed as - - - when disabled.)

[Phase sequence display screen]

SELECT

To [Reactive energy display screen]

POSI : Positivel phase NEGA : Negative phase

37

Select PROTECT from the main menu screen and press ENTER to switch to the protection characteristics selection screen. The options switch as follows: LTD STD/INST ER LTD .... * Protection characteristics cannot be set (changed). Use the setting dials on the MDU Breaker main unit to change them.

9.3 Display method for protection characteristic setting values

[LTD setting value display screen]

(1) Current setting check Select Ir in the LTD setting value display screen. The current setting of the MDU Breaker main unit can be checked.

ENTER

RETURN

ENTER

RETURN

[Main menu screen]

[LTD setting value display screen]

I N GS E T T

TR E S E

A LR I P /T

E C TP R O T

T E RM E

A I NM P R O T

L T

S T

D

E C

E

D / I N S T

R

[Protection characteristics selection screen]

To [LTD setting value display screen]

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

P L

T - -

I r L

CO T E

]

D TR

T

A[

400

Ir setting value

Select with UP/DOWN

TL setting value

(2) Long limit operating time TL check Select TL in the LTD setting value display screen. The long limit operating time (TL) setting value of the MDU Breaker main unit can be checked.

I6t ON/OFF

Select with UP/DOWN

Is setting value

(3) Short time delay tripping current (Is) Select STD/INST in the protection characteristics selection screen. (Screen [1]) The short time delay tripping current (Is) setting value can be checked in the STD/INST setting value display screen. (Screen [2])

Screen [1] Screen [2]

[STD/INST setting value display screen]

[Protection characteristics selection screen]

ENTER

RETURN

Select with UP/DOWN

P C TE

a

T - -

L

0 0 %

F

t 2

0

DL T R O

I

T

rI

O F N6 t O

[ s ]

100.

0 ]

0.1

T s I i

RP I s

DT

S / I N S T O T E C T

[ I E R

T/ I N SS T D

T DL

C TR O T EP

38

Select with UP/DOWN

Select with UP/DOWN

Ts setting value

Ii setting value

(5) Instantaneous tripping current (Ii) check The instantaneous tripping current (Ii) setting value can be checked in the STD/INST setting value display screen.

(6) Rated sensitivity current In and maximum operating time (Te) display Select ER in the protection characteristic selection screen. (Screen [1]) * -- displayed for MCCBs. * ER: Electric leakage characteristic.

I2t ON/OFF

P

I i T s I s

R T D T/ I N SS

EO T C T

[

35 A

0 ]

0

[STD/INST setting value display screen]

[STD/INST setting value display screen]

[ER setting value display screen]

[ER setting value display screen]

(4) Short time delay operating time (Ts) check The short time delay operating time (Ts) setting value can be checked in the STD/INST setting value display screen.

E R R O T E C TP

- - - - - -

P R O T E C T E R - - - - - -

E R

T/ I N SS T D

T DL

C TR O T EP

[Protection characteristics selection screen]

Select with UP/DOWN

ENTER

RETURN

DOWN

UP

Screen [1] Screen [2] Screen [3]

I r I i TL Is Ts I 6t I 2t In Te

: Current setting : Instantaneous tripping current : Long time delay operating time (at 200%) : Short time delay tripping current : Short time delya operating time (at Is 1.5) : Long time delay lamp characteristics : Short time delaylamp characteristics : Rated sensitivity current : Maximum operating time

I6t ON

I6t OFF

Current

Operating time

TL

T

Is I2t ON

I2t OFF

Ts

Ii

I

I T

s

F

s ]

.3 [

0

s I i

2 t O NI

P R T E CO N SS T D / I T

T

O F

39

Select TRIP/AL in the main menu screen and press ENTER to switch to the fault/alarm display screen. The screen switches between the fault cause/current display screen and the alarm display screen with UP/DOWN.

[ - ] R I PT

[Main menu screen] [Fault cause/current

display screen]

- - -

- - - I U B A L

A LI L I D M A L

AN L

O V E R - - -

- - -

P A L

L A R MA

R I PT [ A ]

I N S T

11328

Fault cause Overload/short-circuit trip LTD : Long time delay trip STD : Short time delay trip INST : Instantaneous trip

When an alarm occurs is displayed.

I N GS E T T

R E S E T

A LR I P /T

E C TP R O T

T E RM E

A I NM

Fault current

[Fault cause/current display screen]

Without fault history

[Alarm display screen]

The screen automatically switches and information is displayed in the fault cause/current display screen when a fault occurs, and in the alarm display screen when an alarm occurs. In addition, the backlight is lit in red. The illumination of the backlight goes back to white when any of the operation buttons is pressed, and the display screen also goes back to the previous screen that was being displayed before the alarm display screen was displayed. (An alarm that has been output keeps remaining in the alarm output status until it is reset.) The illumination of the backlight goes back to white if the cause of the alarm is removed when the alarm reset method is set to auto reset, and the display screen also goes back to the previous screen that was being displayed before the alarm display screen was displayed. (The output alarm is also reset.)

9.4 Fault/Alarm display methods and display contents

ENTER

RETURN

DOWN UP

Select RESET in the main menu screen and press ENTER to switch to the reset screen. The options switch as follows: TRIP ALARM ALL EP (Wh) EQ (varh) TRIP.... Select the item that you wish to reset, and apply the selection with ENTER. Select YES in the allow changes screen and execute the reset with ENTER.

[Main menu screen] [Reset screen] [Allow changes screen]

TRIP : Resets a fault cause/current ALARM : Resets an alarm ALL : Reset load current, line voltage, electric power, reactive power, power factor, harmonic current, occurrence time of maximum/minimum harmonic current content values Electric energy, reactive energy, fault cause/current, and alarms are not reset EP (Wh) : Reset electric energy (to 0 kWh) EQ (varh) : Reset reactive energy (to 0 kvarh)

I N GS E T T

TR E S E

/ A LT R I P

E C TP R O T

T E RM E

A I NM

E SY

ON

E S E TR

?O K

R E S E T

T R I P

R MA L A

A L L

E P ( W h )

E Q ( v a r h )

9.5 Method for resetting fault cause/current, alarm, maximum value, electric energy, and reactive energy

ENTER

RETURN

ENTER

RETURN

ENTER

To [Phase switching display screen]

Select with UP/DOWN

PAL : Load current pre-alarm OVER : Overcurrent alarm NLA : Neutral line open phase alarm (enabled when phase wire type is 1P3W) IDMAL : Electric current demand alarm (enabled when communication, display is ON;

displayed as --- if OFF) ILAL : Electric current open phase alarm (enabled when communication, display is

ON; displayed as --- if OFF) IUBAL : Electric current unbalance alarm (enabled when communication, display is ON;

displayed as --- if OFF)

40

ENTER

To [Phase switching display screen]

* When the setting of each item is changed, NOW SETTING ... is displayed until the setting is completed.

M A I N

M E T E R

P R O T E C T

T R I P / A L

R E S E T

S E T T I N G

[Main menu screen] [Setting screen]

S E T

M e

l

a

a

D a

E P /

A

CL

t

D

s

r

e

u r e

m

E Q

P

sn ye S

m

h

D e

aP

E TS

s e

d

L i

u l

s e

a n

S E T

M e

l

a

a

D a

E P /

A

CL

t

D

s

r

e

u r e

m

E Q

[Setting screen] [Measurement setting

selection screen]

Phase : Phase switching ON/OFF setting Demand : Demand time limit setting LineSys : Phase and wire setting Pulse : Pulse unit setting (When equipped with electric energy pulse output)

(1) Phase switching setting [Default value: Normal (no phase switching)] Select Phase in the measurement setting selection screen. (Screen [1]) Press ENTER to switch to the phase switching display screen. (Screen [2]) Next, press ENTER to enable the change of the phase switching setting value. (Screen [3]) Select Normal (with no phase switching) or Inverse (with phase switching) with UP/DOWN, and apply the setting with ENTER. Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

Y E

N O

T

O K ?

S

S E

WN O

T T I N GS

E

P

sn ye S

m

h

D e

aP

E TS

s e

d

L i

u l

s e

a n

es

a s e

o r m

E ?C N

e r

AH

n vI

G

la

h

S E T

N

P

s e

l

e

v

m a

r

s

r

a

o

S

e

E T

nI

hP

N

[Measurement setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Phase switching display screen]

Screen [3]

Select SETTING in the main menu screen and press ENTER to switch to the setting screen. The options switch as follows: Measure Alarm LCD Date EP/EQ Measure....

Select Measure in the setting screen and press ENTER to switch to the measurement setting screen. The options switch as follows: Phase Demand LineSys Pulse Phase....

9.6 Method for various settings

9.6.1 Setting method for measurement-related items

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Phase switching setting value

Phase switching setting value Select with UP/DOWN

Select NO YES with UP/DOWNSelect with

UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

41

E TS P h a

e mD

n e S y s

P esl

i

u

L

a n d

s e

Y E

N O

T

O K ?

S

S E

15

E ?C H GA N

e n

S TE

D d T i m e m a

[ m i n ] [ m i n ]

[Measurement setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Demand time limit display screen]

Screen [3]

15

E

T D e m d

e

S T

a n i m

Y E

N O

T

O K ?

S

S ES E T

e mD

P h a

n e S y s

P

d

e

n

e

s

a

sl

i

u

L

3 W

P 2

4 W

L ni

1 W

E TS

1 P 3 W

S ye

P

s

P

3

3

[Measurement setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Line system display screen]

Screen [3]

Y E

N O

T

O K ?

S

S ES E T

P h a

e mD

n e S y s

P e

d

l s

e

n

i

u

s

a

L

[Measurement setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Pulse unit display screen]

Screen [3]

1 0

1

1

0 0 0

0 0 0 0 k W

1 0 0

[

1

l sP

S eu

h

E T

]

(2) Demand time limit setting [Default value: 2 min] Select Demand on the measurement setting selection screen. (Screen [1]) Press ENTER to switch to the demand time limit display screen. (Screen [2]) Next, press ENTER to enable the change of the demand time limit display setting. (Screen [3])0 1 2 ... 14 15 0...(per 1 minute). Press ENTER to decide the setting. Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

(3) Line system setting [Default value: 3P3W] (3P4W for 4-pole products) Select LineSys on the measurement setting selection screen. (Screen [1]) Press ENTER to switch to the line system display screen. (Screen [2]) Next, press ENTER to enable changes in the line system display screen. (Screen [3]) Select one of the following with UP/DOWN. 1P2W (single-phase two-wire) 1P3W (single-phase three-wire) 3P3W (three-phase three-wire) 3P4W (three-phase four-wire) *Only for 4-pole product Press ENTER to decide the setting. Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

(4) Pulse unit setting [Default value: 1 kWh] Select Pulse on the measurement setting selection screen. (Screen [1]) Press ENTER to switch to the pulse unit display screen. (Screen [2]) Next, press ENTER to change the pulse unit setting value. (Screen [3]) The settings switch as follows: 1 10 100 1000 10000 1 ... (kWh/Pulse). Press ENTER to decide the setting. Select YES on the allow changes screen and press ENTER to change the setting. (Screen [4])

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

Demand time limit setting value

Line system setting value

Pulse unit setting value

Select with UP/DOWN

ENTER

To [Demand time limit display screen]

ENTER

To [Line system display screen]

ENTER

To [Pulse unit display screen]

Select NO YES with UP/DOWN

Select NO YES with UP/DOWN

Select NO YES with UP/DOWN

W

W

GH A

T

L i

S

C

3

E

1 3

3P

3 P 4

W

P 2

P

W

N

1

n e S y s

E ?

1 0

1 0 0 0

1 0 0 0 0 h ]

C H A N G [ k W

0 1 0

l s e

E TS P u

1

E ?

42

s u r e

r m

e

E QE P /

D a t

DL C

l aA

M e a

S E T

[Setting screen]

H o l dA L _

_

A

A L

S E T

P A L

I LAD M _

I L A _ L

I U B

[Alarm setting selection screen]

[Alarm setting selection screen]

Screen [1] Screen [2]

[PAL setting check screen] When PAL option

0 ]

P A

S E P A L

L O F

70. [ %

P A L _ T

5 ][ s

0.0

F

T

O N

_ P U

9.6.2 Setting method for alarms Select Alarm on the setting screen and press ENTER to switch to the alarm setting selection screen. The options switch as follows: PAL IDM_AL ILA_AL IUB_AL AL_Hold PAL....

ENTER

RETURN

ENTER

RETURN

(1) Pre-alarm (PAL) setting check Select PAL on the alarm setting selection screen. (Screen [1]) Press ENTER to open the PAL setting check screen that allows you to check the pre-alarm current (Ip) and pre-alarm operation time (Tp) setting values for the MDU Breaker main unit. (Screen [2]) * Characteristics cannot be set (changed). Use the setting dials on the MDU Breaker main unit to change them. * There is no setting dial for the pre-alarm operating time. The setting is 1/2 the long time delay operating time (TL).

Select with UP/DOWN

Select with UP/DOWN

Pre-alarm ON/OFF

Ip set t ing va lue

Tp set t ing va lue

Y E

N O

T

O K ?

S

S E

[Alarm setting selection screen]

Screen [1] Screen [2]

[Electric current demand alarm setting display screen]

Screen [3]

S E T I D M _ A L

O N O F F

I D M _ P U

[ % ] I D M _ T

n ][ m i

2.0

15.0

7

[ m i

15 M _ T

A L O

I D

E T _

S I D M

N O F F

M _ P U

72.0 I D

[ % ]

.0 n ]

[ m i

15 M _ T

S E T I D M _ A L

O N O F F

I D M _ P U

72.0 I D

[ % ]

.0 n ]

E ?

PI D

_ T

M

I

_

S E T I D M _ A L

O N O F F U

0 % ]

72. D M

[

1 N

[ m i n

.5 0 G

] C H A

H o l dLA _

_ A L

_ A LBI U

L AI

LI AM _D

P A L

S E T

[ON/OFF setting]

[Demand time limit setting] [Allow changes screen]

Screen [4]

Screen [5] Screen [6]

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Select with UP/DOWN

Select with UP/DOWN

Change with UP/DOWN

Change with UP/DOWN

IDM_AL ON/OFF

IDM_AL Pickup current setting value

IDM_AL Demand time limit setting value

(2) Electric current demand alarm (IDM_AL) setting [PU default value: 100%, TIME default value: 2 min.] Select IDM_AL on the alarm setting selection screen. (Screen [1]) Press ENTER to switch to the electric current demand alarm setting display screen. (Screen [2]) Press ENTER, select ON (function enabled) or OFF (function disabled), and press ENTER to decide the setting. (Screen [3])

[Pickup current setting]

ENTER

To [Electric current demand alarm setting display screen]

Select NO YES with UP/DOWN

[2] OFF (function disabled) setting method After selecting OFF from the ON/OFF setting,press ENTER to switch to the allow changes screen.Select YES and press ENTER to decide the setting. (Screen [6])

[1] ON (function enabled) setting method The pickup current setting value can be changed between 50.0 and 100.0 (per 1.0%). (Screen [4]) Press ENTER to switch to the demand time limit setting value. The demand time limit setting value can be changed between 1.0 and 10.0 (per 1.0 minute) 15.0 20.0 25.0 30.0 (per 5.0 minutes). (Screen [5]) Press ENTER to switch to the allow changes screen. Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [6])

PAL : Pre-alarm setting display IDM_AL : Current demand alarm setting ILA_AL : Current open-phase alarm setting IUB_AL : Current unbalance alarm setting AL_Hold : Alarm reset method setting

H o l dA L _

_

A

A L

S E T

P A L

I LAD M _

I L A _ L

I U B

43

Y E

N O

T

O K ?

S

S E

[Alarm setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Electric current open phase alarm setting display screen]

Screen [3]

E ?

O N O F

C H A N G

F

S E T I L A _ A L

F O N O F

I L A _ A L

S E T

L

_ A L

_ A

H o l d

LBI U

A L _

L AI

AI D M _

P A L

S E T

[ON/OFF setting]

Y E

N O

T

O K ?

S

S E

_ A

_ A

L

LI U B

A L _ H o l d

I L A

LD M _I A

P A L

S TE

[Alarm setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Electric current unbalance alarm setting display screen]

Screen [3]

[ON/OFF setting]

E ?H A N GC

I U B _ A L E TS

F N F

O O O F F

O N I U B _ A L

TS E

(3) Electric current open phase alarm (ILA_AL) setting Select ILA_AL on the alarm setting selection screen. (Screen [1]) Press ENTER to switch to the electric current open phase alarm setting display screen. (Screen [2]) Press ENTER again, select ON (function enabled) or OFF (function disabled), and press ENTER to decide the setting. (Screen [3]) Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

To [Electric current open phase alarm setting display screen]

ENTER

To [Electric current unbalance alarm setting display screen]

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

ILA_AL ON/OFF

IUB_AL ON/OFF

Select NO YES with UP/DOWN

Select NO YES with UP/DOWN

(4) Electric current unbalance alarm (IUB_AL) setting Select IUB_AL on the alarm setting selection screen. (Screen [1]) Press ENTER to switch to the electric current unbalance alarm setting display screen. (Screen [2]) Press ENTER again, select ON (function enabled) or OFF (function disabled), and press ENTER to decide the setting. (Screen [3]) Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

Y E

N O

T

O K ?

S

S E

N G E ?C H A

H

A

A L

E TS

n g

R e s

l d i

l dH o

t o

o

_

u

_ A L

_ A L

H o l dA L _

I U B

I L

L

A

I D

P A L

M _ A

S E T

[Alarm setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[Alarm reset method setting display screen]

Screen [3]

[Alarm reset method setting]

(5) Alarm reset method setting [Default value: AutoRes (auto reset)] Select AL_HOLD on the alarm setting selection screen. (Screen [1]) Press ENTER to switch to the alarm reset method setting display screen. (Screen [2]) Press ENTER, select AutoRes (auto reset) or Holding (self holding), and press ENTER to decide the setting. (Screen [3]) Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Select with UP/DOWN

Select with UP/DOWN

Alarm reset method setting value

ENTER

To [Alarm reset method setting display screen]

Select NO YES with UP/DOWN

l d

o R e sA u t

o l dA L _ H

E TS

H o i n g

44

s u r e

r m

e

E QE /

a t

P

D

DL C

l aA

M e a

S E T

-

t

B

r

L

a s t

S E T

DL C

C o n

D i r e c t i o n

[Setting screen] [LCD setting

selection screen]

Y E

N O

T

O K ?

S

S E

O N

S E T

L C D - B L

A u t o O F F

O F F

S E T

L C D - B L

A u t o O F F

O N

O F F

C H A N G E ?

-

t

B

r

L

a s t

S E T

DL C

C o n

D i r e c t i o n

[LCD setting selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [4]

[LCD backlight setting display screen]

Screen [3]

[LCD backlight setting]

+

tsr a

T

t

E

n

S C o

-

- B L

t r a s tC o n

L C D

S E T

D i r e c t i o n

[LCD setting selection screen]

Screen [1] Screen [2]

[LCD contrast setting display screen]

Select LCD on the setting screen and press ENTER to switch to the LCD setting selection screen. The options switch as follows: LCD-BL Contrast Direction LCD-BL....

9.6.3 Setting method for LCD

LCD-BL : LCD backlight setting Contrast : LCD contrast setting Direction : Display direction setting

ENTER

RETURN

(1) LCD backlight setting [Default value: AutoOFF (auto shutoff)] Select LCD-BL on the LCD setting selection screen and press ENTER to switch to the LCD backlight setting display screen. (Screens [1] [2]) AutoOFF (Auto shutoff: The light automatically turns off when no operation is made for approximately 5 minutes. The light turns on again with switch operation.) Select ON (ON at all times) or OFF (OFF at all times) and press ENTER to decide the setting. (Screen [3]) Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4])

ENTER

To [LCD backlight setting display screen]

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Select with UP/DOWN

Select with UP/DOWN

Select with UP/DOWN

LCD backlight setting value

LCD contrast setting value Increase (+) : UP Decrease (-) : DOWN

Select NO YES with UP/DOWN

(2) LCD contrast setting [Default value: 2 (middle value between 0 and 4)] Select Contrast on the LCD setting selection screen. (Screen [1]) Press ENTER to switch to the LCD contrast setting display screen. (Screen [2]) Use UP/DOWN to switch the contrast of the screen. Press ENTER to decide the setting.

45

Y E

N O

T

O K ?

S

S E

2 1

S E T

1 2

21

D i r e c t i o n

S E T

1 2

2 1

1 2

C H A N G E ?

D i r e c t i o nL- B

t r a s tC o n

L C D

S E T

D i r e c t i o n

[LCD setting selection screen]

Vertical direction display Horizontal direction display - 1

Horizontal direction display - 2

Line side

Line side

Line side

Load side

Load side

Load side

[Allow changes screen]

Screen [1]

ENTER (Center)

SELECT (Right)

Screen [2] Screen [4]

[Display direction setting display screen]

Screen [3]

[Display direction setting]

3.

hW

2

]

2 [ k

3464

[

24 A ]

a x e m

. P d

M D

EP

I

3.

hW

2

][ k

64243

[

24 A ]

a x e m

. P d

M D

EP

I

d P

D e x m

a . [I M

243 EP

64 [ k W

A

249 ]

.0 h ]

d P

D e x m

a . [I M

243 EP

64 [ k W

A

249 ]

.0 h ]

d P

D e x m

a . [I M

243 EP

64 [ k W

A

249 ]

.0 h ]

(3) Display method setting [Default value:1 2 (Vertical direction display)] Select Direction on the LCD setting selection screen. (Screen [1]) Press ENTER to open the display direction setting display screen. (Screen [2]) Press ENTER and select one from the following options: 1 2 : Vertical direction display : Horizontal direction display - 1 : Horizontal direction display - 2 Apply the setting with ENTER. (Screen [3]) Select YES on the allow changes screen and press ENTER to decide the setting. (Screen [4]) * Returns to the screen in the display direction changed. * The direction of the operation switches is also changed to fit the installation direction of the MDU Breaker.

12

1 2

ENTER

To [Backlight setting display screen]

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

Select with UP/DOWN

d P

D e x m

a . [I M

243 EP

64 [ k W

A

249 ]

.0 h ]

Select with UP/DOWN

Select NO YES with UP/DOWNDisplay

direction setting value

RETURN (Left)

UP (Up)

DOWN (Down)

SELECT (Right)

RETURN (Left)

UP (Up)

DOWN (Down)

ENTER (Center)

SELECT (Right)

RETURN (Left)

UP (Up)

DOWN (Down)

ENTER (Center)

46

Y E

N O

T

O K ?

S

S E

/ t e

T i

C H A N G

S E T

em

?

:00 E

01/01

00

D a

10/

S E T

eM e a

A l a

s u

L C D

D

P /

a t

E

r

e

r m

E Q

[Setting item selection screen] [Allow changes screen]

Screen [1] Screen [2] Screen [5]

[Time setting display screen]

Screen [3]

Year setting

D a

/

00

E T

00:

e

01

S t e

T i m

18/01/

S

18/11/05

20:34

E T

D a t e / T i m e

Minute setting

Screen [4]

9.6.4 Setting method for date and time [Default value: 10/01/01 00:00] Select Date on the setting screen. (Screen [1]) Press ENTER to switch to the time setting display screen. (Screens [2] to [4]) Press ENTER or SELECT to shift from Year Month Day Hour Minute. Press Return to return from Minute Hour Day Month Year. Select an item to change, and then change the value with UP/DOWN. (Screens [3] to [4]) After setting the minute, press ENTER to switch to the allow changes screen. Select YES and press ENTER to decide the setting. (Screen [5]) * The year setting takes a two digit number, where 00 to 99 corresponds to 2000 to 2099.

ENTER

RETURN

ENTER

RETURN

ENTER

RETURN

ENTER or SELECT

RETURN

ENTER or SELECT

RETURN

ENTER

RETURN

Select with UP/DOWN

Year/ month/ day

Select with UP/DOWN

Select with UP/DOWN

Hour/ minute

ENTER

To [Time setting display screen]

ENTER

To [Electric energy setting display screen]

Select NO YES with UP/DOWN

9.6.5 Setting method for electric energy

Y E

N O

T

O K ?

S

S E

][ k W h

35741

S E P

3

E TE T

3

S E P

74153 [ k W h ]

3

E

E P

HC A N G E ?

5 [ k W

4

TS

317 h ]

S E T

E P (

E Q ( )h

)

v a r

W h

[Electric energy setting selection screen]

Screen [1]

[Electric energy setting display screen] Leftmost digit setting Rightmost digit setting [Allow changes screen]

Screen [2] Screen [3] Screen [4]

(1) Electric energy setting Select EP (Wh) in the electric energy setting selection screen and press ENTER to go to the electric energy setting display screen. (Screen [1]) Press ENTER to enable the setting of electric energy. (Screen [2]) Press ENTER or SELECT to toggle the options between Leftmost digit ... ... Rightmost digit, or press RETURN to toggle in the reverse direction from Rightmost digit ... Leftmost digit. (Screens [2] [3]) Select a digit to change the value. After setting the rightmost digit, press ENTER to display the allow changes screen. Select YES and press ENTER to decide the setting. (Screen [4])

ENTER

RETURN

ENTER

RETURN

s u r e

r m

e

E QE P /

D a t

L C D

A l a

aM e

S E T

[Setting item selection screen]

Select with UP/DOWN

Change with UP/DOWN

Change with UP/DOWN

ENTER or SELECT

RETURN

ENTER or SELECT

RETURN

ENTER

To [Electric energy setting display screen]

Select NO YES with UP/DOWN

Select EP/EQ from the setting item selection screen and press ENTER to switch to the electric energy setting selection screen. The options switch as follows: EP (Wh) EQ (varh) EP (Wh)....

EP : Electric energy setting EQ : Reactive energy setting

47

Y E

N O

T

O K ?

S

S ES E T

E Q

[ k v a r h ]

10847

S E T

E Q

10847 [ k v a r h ]

S E T

E Q

10847 [ k v a r h ]

C H A N G E ?

Screen [1]

[Reactive energy setting display screen] Leftmost digit setting Rightmost digit setting [Allow changes screen]

Screen [2] Screen [4]Screen [3]

(2) Reactive energy setting Select EQ (varh) in the electric energy setting selection screen and press ENTER to go to the reactive energy setting display screen. (Screen [1]) Press ENTER to enable the setting of reactive energy. (Screen [2]) Press ENTER or SELECT to toggle the options between Leftmost digit ... ... Rightmost digit, or press RETURN to toggle in the reverse direction from Rightmost digit ... Leftmost digit. (Screens [2] [3]) Select a digit to change the value. After setting the rightmost digit, press ENTER to display the allow changes screen. Select YES and press ENTER to decide the setting. (Screen [4])

ENTER

RETURN

ENTER

RETURN

Change with UP/DOWN

Change with UP/DOWN

ENTER or SELECT

RETURN

ENTER or SELECT

RETURN

ENTER

To [Reactive energy setting display screen]

Select NO YES with UP/DOWN

48

]W h

EP [ k

24364 0

EP D e m d [ k W h ]

9124 40476

: 0 02 0 / 0 57 / 1 11

h ][ k W m d xEP M a

D e

N

1 [

I

1

0

.7

2

3

A ]

2 .

2

243.2

49

8

.

11

D T =

1.

m d x

[ ]A

I M a

1

2

D e

0 : 3

min

4

3

2

5

82

1 7 / 1 1 / 0

P k W ][

243.2

]k v a r

Q [

312.

[ % ]

E AL D

0 51 7 2

1 / 0 :

PF M a x

4.4

/ 1

7

3 4

88.0

PF [ % ]

L A G

HI 1 9 t h ][ A

1

2

4.2

.1 3

5 N

5

9.8

3.

60.8

.1 N

2 3

35

54.

20 2

.5 1

[ A ] t o t a lHI

50.8 N

25.1 3

22.2 2

11.5 1

[ A ] 1 s tHI

10.5

20.8 N

21.1 3

16.2 2

1 [ A ]

3 r dHI

1

HI 3 r d [ % ]

30.5 2

.246 3

51.1 N

10.8 31.8

25.1 3

N

1 9 t hHI % ][

.5

24 2

11 1

.2

3.

hW

2

]

2 [ k

3464

[

24 A ]

a x e m

. P d

M D

EP

I

8.

2

40

2

3

N

]%[

30 1

H DTHI

1

0.

81.

5

.2

20.0

20.0

V 1-2

Avr

]

21.0

20.0

2-3

3-1

[ V

20.0

2-N

1-N V ]

3-N

[

V

21.0

20.0

V

4.0

2

M a

V ]

7

1 3

x

[

/ 207 / 4 0 02 :

HI 1

5

2

t h [

53 % ]

.5

43.2 3

.145 N

.840

EQ [ k v a r h ]

2 9481 20

EQ [

D e k v a

m r

d h ]

184 34

0 : 0 01 0 / 1 01 7 / 1

507

a r h ][ k v

x D e m dEQ M a

[1 ] E

le ct

ric e

ne rg

y/ C

om po

un d

[2 ] C

ur re

nt o

f e ac

h ph

as e

[3 ] L

in e

vo lta

ge [4

] E le

ct ric

p ow

er [5

] R ea

ct iv

e po

w er

[1 2]

R ea

ct iv

e en

eg y

[1 1]

H ar

m on

ic c

ur re

nt d

em an

d [1

0] M

ax im

um h

ar m

on ic

cu rre

nt [9

] H ar

m on

ic cu

rre nt

c on

te nt

ra te

[8 ] P

re se

nt h

ar m

on ic

c ur

re nt

[6 ] P

ow er

fa ct

or

[1 3]

P ha

se s

eq ue

nc e

[Present line voltage]

[Present electric power]

[Present voltage demand]

[Maximum electric power demand]

[Present reactive power]

[Present reactive voltage demand]

[Present power factor]

[Maximum power factor]

[Maximum reactive power demand]

[Present voltage between N phases]

[Maximum voltage]

9.7 Measurement display list (1) Vertical display

[Electric energy] [One-hour

electric energy] Maximum one-hour

electric energy]

[Present current] [Present current

demand] [Maximum

all-phase demand]

[Compound]

Hz [ H z ]

60.1

[7 ] F

re qu

en cy

[Frequency]

[Present harmonic current] Total value Fundamental frequency 3rd 19th

[Harmonic current content rate] Total value 3rd 5th 19th

[Maximum harmonic current]

[Harmonic current demand]

[Maximum harmonic current demand]

[Reactive energy] [One-hour

reactive energy] [Maximum one-hour

reactive energy]

Total value 3rd 19th

Seq

O ISP E AGN

[Phase sequence]

8 2

1

1

.

]

1

9.4

I D e m d [ A

2 243. 2

2 1.1 3

2 0 N

7 D T = min

D e m d ][

100.3

D T = 1 2 min

k W

P

-

: 3 4

1.101

P D e m d M a x

k W ][

1 7 2 0

/ 501 1 /

D T = 1 2 min

= 1

v D e

]

Q [ k

m d

312.

D T

a r

2 min

1 / 1 1 /

D T

: 7

Q M

[ k

a D

min

0 3 4 0

r

.0

v a e m d

2 5

= 1 2

]

x

9 0

2 0 : 3 4 1 7 1 / 0 5/ 1

241

[ A ]

x 3 r dHI M a

.0

0 : 3 4 1 7 1 / 0 5/ 1

2

37

[ A ]

x 1 9 t hHI M a

.0

2 0 : 3 4 1 7 1 / 0 5/ 1

002

A ][ 1 s t M a xHI

.0

A ]

x m

M DHI e

a

[ d

74.0

1 7 / 1 / 0 5 2 0 : 3 4 1

D T = 1 2 min

.8 =

.203

40

HI 1

D e m d [ A ]

. 3

2

2

8

20.5

11

N

D T 1 min

49

]hW[ k

342

EP

46 40

EP M a x D e m d [ k W h ]

476 1 7 / 1 1 / 0 5 2 0 : 0 0

EP D e m d [ k W h ]

12490

d P

D e x m

a . [I M

243 EP

64 [ k W

A

249 ]

.0 h ]

2D T =I M a x 1 min D e m d [ A ]

5 2/ 01 7 / 1 1 0 : 3 4

42 3.2 8.7.

N

12

49.02 ]

1

243. 3

2 [ AI

2

11

3 ]

0

7

d = 1D T

.2 N

.8

2 2

.12

49.

2 A[ minI

1 D e

24

11

3 m

21.0

V [ V ]

20.0

20.0 2-3

3-11-2

Avr

20.0

21.0

20.0 2-N

V

20.0 V ]

3-N [

1-N

xV M a [ V ]

274.0 1 7 / 0 4 / 2 3 2 02 : 0

243.2

P k W ][

00.3

W ] 2 minD T = 1

[ kP D e d

1-

m

/ 2 21 7 / 0 4

101 3 : 0 0

dD e m D T = 1

k 2

[ min W ]

.1 2

M a xP

r ]ak v[Q

211.1 .3

= 1 2 min D e m d ]v[ rk aQ

12

D T

2 : 0 02 3 21 7 / 0 4

]v a[ km d D

r T = 1 2 minQ M a

D e x

/

90.0

088.

]%[PF

L A G

/1 7 1 1 /

74 0 5

E A .4D

[ % ]PF M a x

2 0 : 3 4

L 0.6 1

z ][ HHz

3.5 5.1

4.2 9.8

HI 1 9 t h [ A ] 1 3

N2

20.5 35.1

54.2 60.8

HI T o t a l [ A ] 1 3

N2

11.5 25.1

22.2 50.8

HI 1 s t [ A ] 1 3

N2

HI 3 r d [ A ] 1

10.5 3

21.1 2

16.2 N

20.8

. N2

8.02 443

45.53. 31

5 h

1 [ % ]HI 5 t

11.5 25.1 2

24.2 N

31.8

HI 1 9 t h [ % ] 1 3

30.5 51.1 2

46.2 N

10.8

HI 3 r d [ % ] 1 3

%HHI D [T 3

8 N

.

.

1

2

1

3 2

41

0 0

0

2 .5

.8

]

00.02 7 / 0 4 / 2 2 : 0 02 31

A ][1 s t xHI M a

24.01 2 31

A ][3 r d xHI M a

7 / 0 4 / 2 2 : 0 0

37.0 2 31

A ][1 9 t h xHI M a

7 / 0 4 / 2 2 : 0 0

x 1

02 2 : 0/ 2 31 7 / 0 4

274.0

]D e A T = 2 min

[ D

m dHI M a

30.2 20.5

11.8 40.8 2 N

3 A ]

1 [ 2 min

D e m d D T = 1HI

h ]EQ [ k v a r

18249 34

EQ M a x D e m d [ k v a r h ]

750 1 7 / 1 0 / 1 0 1 0 : 0 0

EQ D e m d [ k v a r h ]

20184

Seq

POSI NEGA

[8] Present harmonic current

(2) Horizontal display [Electric energy][1] Electric

energy/ Compound

[2] Current of each phase

[3] Line voltage

[4] Electric power

[5] Reactive power

[6] Power factor

[7] Frequency

[9] Harmonic current content rate

[10] Maximum harmonic current

[11] Harmonic current demand

[12] Reactive energy

[13] Phase sequence

[One-hour electric energy] [Maximum one-hour electric energy] [Compound]

[Present current] [Present current demand] [Maximum all-phase demand]

[Present line voltage] [Present voltage between N phases] [Maximum voltage]

[Present electric power] [Present voltage demand] [Maximum electric power demand]

[Present reactive power] [Present reactive voltage demand] [Maximum reactive power demand]

[Present power factor] [Frequency][Maximum power factor]

[Present harmonic current Total value] Fundamental frequency 3rd 19th

[Harmonic current content rate Total value] 3rd 5th 19th

[Maximum harmonic current Total value] 3rd 19th

[Harmonic current demand] [Maximum harmonic current demand]

[Reactive energy]

[Phase sequence]

[One-hour reactive energy] [Maximum one-hour reactive energy]

50

10.1 Precautions for setting operation

10.2 Precautions when setting via CC-Link communication

Consecutive setting of different settings (demand time limit, alarm reset method, storage clear)

Wait 3 s.

Demand time limit setting Clear all

Alarm reset method setting

Demand time limit setting ..........

Consecutive setting of different settings (demand time limit, storage clear)

Wait 3 s.

Wait 3 s.

Wait 3 s.

Demand time limit setting

Clear electric energy

Demand time limit setting

Clear fault current/cause ..........

Wait 3 s.

Wait 3 s.

Consecutive transmission of different commands (demand time limit, alarm reset method, storage clear)

Wait 3 s.

Send demand time limit setting &

receive normal response

Send clear all & receive normal

response

Send alarm reset method setting &

receive normal response

Send demand time limit setting &

receive normal response

..........

Consecutive transmission of different commands (demand time limit, storage clear)

Wait 3 s.

Wait 3 s.

Wait 3 s.

Send demand time limit setting &

receive normal response

Send clear fault current/cause

& receive normal response

Send demand time limit setting &

receive normal response

Send clear electric energy & receive normal response

..........Wait 3 s.

Wait 3 s.

10. Appendix

The display can be used to set and clear the items described in 9.5 Method for resetting fault cause/current, alarm, maximum value, electric energy, and reactive energy and 9.6 Method for various settings. When items are set or cleared, the non-volatile memory storage will be overwritten for all of these except for the items described in 9.6.4 Setting method for date and time. It takes some time to overwrite the non-volatile memory storage, and items may not be properly overwritten in the non-volatile memory if they are set or cleared in quick succession. Therefore, as shown in the examples below, wait around three seconds after setting or clearing an item, before setting or clearing another item (regardless of whether the items are similar or different).

If using a product with CC-Link communication, CC-Link communication can also be used to send certain commands and setting values to a MDU, allowing items to be set and cleared just as when operating the display (as described above). (Refer to MDU Breaker Programming Manual for details on what can be configured and cleared.) The non-volatile memory storage is overwritten (depending on what is set or cleared) when setting and clearing over CC-Link communication, and items may not be properly overwritten in the non-volatile memory if set/clear commands are transmitted in quick succession. Therefore, as shown in the examples below, wait around three seconds after transmitting a set or clear command, before transmitting another command (regardless of whether the commands are similar or different).

51

10.3 Precautions for MDU with CC-Link communication

10.4 I/O signal list (with CC-Link communication)

Signal direction: MDU Master unit

Signal direction: Master unit MDU

Signal name

RYn0 to RYnE

RYnF

ON/OFF (AX) status flag Trip (AL) status flag

Pre-alarm (PAL) status flag

Overload cutoff (LTD) flag

Short cutoff (STD/INST) flag

Lower limit value UNDER

Upper limit value OVER

Unusable

Unusable Unusable Unusable

Overcurrent alarm (OVER) status flag

Unusable Unusable

Unusable Unusable

Unusable

Command complete response flag Command execution request flag

Unusable

n: Address assigned by the station number setting Note 1: If the alarm retention setting is set to self-hold and this is set once to 1 (ON), it will continue to be 1 (ON) until the alarm is reset on

the MDU, even if the cause of the alarm is eliminated. Note 2: When the error status flag (RX(n+1)A) is 1 (ON), the bit (RXn8, RXn9) status does not change.

If the error status flag is set to 1 (ON), we recommend eliminating the cause of the error immediately. Note 3: If an unusable device is turned ON/OFF by a sequence program, MDU functionality is not guaranteed.

Unusable

Error status flag Error reset status flag Remote READY

Initial data processing request flag Initial data processing complete flag

The MDU uses 32 input contacts and 32 output contacts when sending and receiving data with the master unit. The following table shows I/O signal assignment and signal names. Device RX indicates an input signal from the MDU to the master unit, while device RY indicates an output signal from the master unit to the MDU.

Device No. Signal name

Unusable

Device No.

RXn0 RXn1

RXn2 RXn3 RXn4 RXn5

RXn6

RXn7

RXn8

RXn9 RXnA RXnB RXnC RXnD RXnE RXnF

RX(n+1)0 to RX(n+1)7

RX(n+1)8

RX(n+1)9

RX(n+1)A RX(n+1)B

RX(n+1)C to RX(n+1)F

RY(n+1)0 to RY(n+1)7

RY(n+1)8

RY(n+1)9

RY(n+1)A

RY(n+1)B to RY(n+1)F

(1) Note that the special link registers of the master unit (SW0084 to SW0087) will not be set to 1 (ON), even if a watchdog timer error occurs in the MDU.

(2) A power outage will occur in the CC-Link I/F section if the power turns OFF for at least 5 to 10 ms. When the power is restored, the initial data processing request flag (RX(n+1)8) will be set to 1 (ON), remote READY (RX(n+1)B) will be set to 0 (OFF), the bits that indicate the alarm and circuit breaker status (RXn0 to RXn7) and the upper/lower limit bits (RXn8 and RXn9) will be retained at their states prior to the power outage, and the remote registers (RWrn to RWrn+3) will be set to 00H.

(3) Refer to MDU Breaker Programming Manual for details on PLC programs.

52

10.6 Communication error codes and solutions

Error code Note: The numbers in parentheses are in hexadecimal notation.

Digital command, analog command, or pulse command

Undefined command. Set the correct command.

Turn the MDU control power supply OFF and then ON again, or press the reset switch.

Set the channel number to the correct value.

Set the setting value to the correct value.

Set the upper limit value and lower limit value so that they do not cross.

Hardware error.

Channel number out of range.

Setting value out of configuration range.

Group number out of range. Set the group number to the correct value.

Upper limit value and lower limit value cross.

Standard command between devices

1 (01h)

16 (10h) 192 (C0h)

193 (C1h)

194 (C2h)

209 (D1h)

65 (41h)

66 (42h)

81 (51h)

83 (53h)

Error details Solution

(1) With CC-Link transmission option

10.5 Remote register allocation (with CC-Link communication) Remote register allocation is shown below.

m, n: Address assigned by the station number setting

Details

Command, channel, data, etc.

Reply data from RWwm command

Send/receive direction Address

Master Remote

Remote Master

RWwm RWwm+1 RWwm+2 RWwm+3 RWwn RWwn+1 RWwn+2 RWwn+3

Note: Errors other than those listed above are detected by the detector on the command transmission side. Refer to the Instruction Manual for that device for details.

Note: If the error status flag (RX(n+1)A) is set once to 1 (ON), the error status flag will not be set to 0 (OFF) even if the CPU of PLC is reset. To set the error status flag to 0 (OFF), set the error reset status flag (RY(n+1)A) to 1 (ON). However, even if the error status is released when the error reset status flag is set to 1 (ON), if there is an error in the retransmitted data, the error status flag will once again be set to 1 (ON). Therefore, refer to the error code and eliminate the cause of the error prior to retransmitting.

10.7 Troubleshooting Check the following if your device appears to be failing.

(1) Is the MDU applied control power?

(2) Nothing is displayed on the display. Is the connection cable connector fully plugged in? Is it disconnected?

(3) The device is powered but the current is 0 A. If the electric current measurement value is less than the measurement lower limit current (less than 1.0% of the measurement rated current), it is cutoff so that the display value is 0 A.

(4) Unable to monitor when transmitting/communicating even though a value is displayed on the display. [1] With CC-Link communication

Confirm that there are no errors in the communication line connection, and that no wires are disconnected. Are there any stations with the same station number on the same transmission route? If there are, configure the correct station number and then press the reset switch.

Is the communication speed set to the same value as the master device? If it is different, configure the correct communication speed and then press the reset switch.

(5) The electric current value measured by the device differs from other measurement values. (Permissible error value or greater.) Confirm that the measurement instrument used for comparison measures the effective value correctly. The device indicates the effective value. If the measurement instrument used for comparison measures the average value instead of the effective value, distortion in the current flowing through the measurement circuit will create a significant difference.

53

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LN107A329H0

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