Mitsubishi EMU-CT50-A Current Sensor User's Manual PDF

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Summary of Content for Mitsubishi EMU-CT50-A Current Sensor User's Manual PDF

CURRENT SENSOR MODEL EMU-CT5-A, EMU-CT50-A, EMU-CT100-A, EMU-CT250-A INSTRUCTION MANUAL EMU-CT5-A / EMU-CT50-A/ EMU-CT100-A/ EMU-CT250-A is split current sensor for energy measuring unit. Read this manual thoroughly before using the equipment for proper handling. This manual should be retained for the future reference. Be sure that the manual is delivered to the end users. The following items for this device are included in package. Check that no items are missing. (1)Split current sensor x1 (2)Instruction manual x1

1Safety Precautions

1.1 Precautions concerning working environment and conditions Do not use the unit in any of the following places. Doing so may cause malfunctions or a reduction in service life.

Places where the ambient temperature exceeds the working temperature range(-5C to +55C).

Places where the daily average temperature exceeds +35C. Places with a lot of vibration or impacts.

Places where the humidity exceeds the humidity range (30% to 85%RH) or where condensation occurs.

Places exposed to direct sunlight. Places where the out of the cabinet.

Places with a lot of dust, corrosive gas, salt or oily smoke. Places with strong electromagnetic field or noise. Places where the unit may be exposed to rain or drops of water. Place where the altitude exceeds 2000m. Places where metal pieces or inductive substances are laying around.

1.2 Precautions concerning preparations before using the equipment Use the unit in the specified usage environment and conditions. Check the current and voltage ratings of the equipment.

1.3 Precautions concerning installation and connection

Caution

For safety, the unit must be installed and connected by experts in electrical work Use an electric wire of the size of penetrating this current sensor for a primary side cable, do not use a non-insulation electric wire or a metal for a primary cable. When threading and wiring, take utmost care that cuttings and wire pieces do not enter the equipment. Connect the wires carefully, checking the wiring diagram. Incorrect wiring can cause unit failures, fires, and electric shocks. Perform wiring work with current off and do not perform live wire operations. Doing so can cause electric shocks, unit failures, and fires. After tightening, be sure to check that all screws have been tightened. Failure to tighten any screw can cause unit malfunctions, fires, and electric shocks. Use the M3 screws crimp type terminals (less than external form 7.2mm) appropriate for which is suitable for electric wire size(1.25mm2). The use of the infelicity causes malfunction of the machinery, trouble, damage by a fire, the fire by outbreak of the poor disconnection and contact. +60/+75 copper conductor only. Confirm that a terminal is closed surely. The lack of clamping causes malfunction of the machinery, a fire, the electric shock. Carry out the clamping of the crimp-type terminal lugs by prescribed torque (0.49 to 0.78Nm). The excessive clamping becomes the ruination of a terminal and the screw. Keep the second terminals 1cm or more away from the panel and the first conductor. Read the manual of measuring units which is used with this current sensor , and is used well, and follow it. Use this current sensor in cabinet certainly. As for the panel, it be assumed that it was given the following matters. a) It is necessary to attach a key to the cabinet. b) The structure that a power supply is intercepted automatically is necessary when opening a cabinet. Degrees of protection (IP code) needs to higher than IP2X level. Dust or rust on the split part can degrade the performance of the current transformer . Wipe the dirt from the surface with soft dry cloth. Do not keep open a current sensor, may cause not only malfunctions or unit failure. Use the unit within the rated range stated here. Using the unit out of the rated range may cause not only malfunctions or unit failure, but also fires or burnout. The secondary side of the current sensor has a built-in protective circuit against opening of the secondary terminal. No problem occurs by opening the terminal during wiring work. However, for safety, do not continuously apply current while the terminal is open.

1.4 Precautions concerning maintenance

Caution Protect the unit from a power failure. Failure to do so can cause unit failures, fires, or electric shocks. Wipe off the surface dirt with tender cloth. Dont let chemical cloths touch it for a long time, and do not wipe it with benzine or thinner.

1.5 Precautions concerning inspection

Caution Perform the check in the state that does not turn on electricity by all means. Check out the following. a) Does not this product have the damage? b) Are not there an abnormal sound, bad-smelling fever? c) Are not there installation, the slack of the screw?

1.6 Precautions concerning storage

Places where the ambient temperature is out of the range from -10C to +60C. Places where the humidity exceeds the humidity range (5% to 95%RH) or where

Places where metallic particles or inductive substances are laying around.

Places where the daily average temperature exceeds +35C. Places with a lot of vibration or impact. Places with a lot of dust, corrosive gas, salt or oily smoke.

Places where the unit is exposed directly to rain, water droplets.

1.7 Precautions concerning disposal

Dispose this product appropriately in accordance with the national or community rule.

2Installation

1) Press the locking claw of the moving core, please open the moving core by removing the engagement (Figure 1). Before inserting the cable, check the symbols K and L to fit the current sensor in the correct direction. (The direction from the power supply side to the load side is indicated with . ) (Figure 3)

2) After checking that the core parting faces are free from dirt, close the moving core. Push down the moving core until the stoppers are securely locked. (Locking claw of the moving core is applied to the stopper,you hear click.) (Figure 2)

3) Pass the tying bands into the current sensor locking holes to secure the sensor with the cable.(Figure 3) *For the details, see the manual for combination measurement unit. *Applicable wire size in the table of specification is the normal sectional areas of 600V vinyl-coated cable. These values are the standard nominal sectional areas. These electric wires may not pass through the sensor owing to the error of the outer diameters of vinyl insulators finished by manufacturers or deformation (bending) of the wires. Check the wire on site.

(Figure 1) (Figure 2) (Figure 3) CAUSION

K side set LINE side Stopper

Primary cable

Protective cover

Moving core locking claw

Moving core parting face

Tying band Tying band

(LINE side) (LOAD side)

Locking hole (3 x 2)

Locking hole (3 x 2)

Primary cable

*Buy the tying bands.

Direction of current

3Specification

Model EMU-CT5-A EMU-CT50-A EMU-CT100-A EMU-CT250-A Rated primary current 5A AC 50A AC 100A AC 250A AC

Maximum voltage 460V AC

Frequency 45 to 65Hz Ratio error 1% (5% to 100%of rating, RL=10) 1% (5% to 100%of rating, RL=10) Phase displacement 1.3 c rad (10% to 100%of rating, RL=10)

1.8 c rad (5% of rating, RL=10) 1.3 c rad (10% to 100%of rating, RL=10) 1.8 c rad (5% of rating, RL=10)

1.2 c rad (5% to 100%of rating, RL=10)

Pollution degree 2 applicable wire size (reference) IV wire: 38mm2

CV wire: 22mm2 IV wire: 60mm2

CV wire: 60mm2 IV wire: 200mm2

CV wire: 150mm2

Working temperature range -5 to +55 (daily mean temperature: +35 or less)

Working humidity range 30% to 85%RH (no condensation)

See the manual, please wire the polarity (Power supply side, Load side), 1 side (R phase), 2 side (S phase), 3 side (T phase) and the polarity (k, l) of the secondary side of the CT to the k, l terminal of the measuring unit.

If you are considering using this unit for special purpose such as nuclear power plants, aerospace, medical care, or passenger vehicles, please refer to our sales representative.

4Contained harmful substances

5Customer Service

Please refer to "catalog" or users manual (Details) for more detail. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, Japan

Make sure to use the module by following cautions of this section.

Perform installation, disassembly, the wiring work after intercepting a power supply by all means . There might be the damage of an electric shock or the product. ( ) Do not install around non-insulated dangerous electric shock conductors that can cause electric shock,electric burn or arc flash. ( )Danger

condensation occurs.

For the details, see the manual for the combination measurement unit.

SJ/T11364

(2)

6

GB/T 26572

GB/T26572

RoHS

(1)

)

Pb

Hg

Cd

Cr(VI)

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