FUNCTION

Leakage relay is applicable  to AC voltage up to 660V, frequency of 50Hz power distribution system. It is  widely used to prevent equipment failure and electrical fire, and protect  human from electric shock.

SPECIFICATIONS

There  are six parameters needed to specify the leakage relay
 1. Rated voltage (V)

2. Dia. of CT through hole- Ф (mm) and relative max. rated current value (A)

3. Rated residual operating current and non-operating  current (mA)

4. Response time (S)

5. Rated control  capacity:220V/5A

6. Installation method:  normal type—fixed mounting(H type); rail-type or fixed type( Z type); panel  type mounting(M type)

RANGE

1. Rated voltage:  380V/660V

2. Dia of CT through  hole- Ф (mm) and relative max.  rated current value(A): 25/100, 45/200,75/400,100/630

3. Rated residual  operating current and non-operating current is adjustable and customized

4. Quick type response  time: ≤0.1s; Time delay type response time: 0.2-2S

TESTING AND QUALITY

All Mingrui leakage  relays are designed, rated, manufactured and tested in strict compliance with  IEC60755-1983. Routine tests performed on each leakage relay are reclosing  function test, leakage alarm function test and power frequency  voltage-withstand test. Mingrui’s internal quality system has been developed  and certified under ISO 9001 quality system

CONSTRUCTION

The whole set leakage  relay includes zero-sequence current transformer, electronic circuit, test  circuit and tripping relay. For shipping all units are crated for added  protection.

OPTIONS

• Customized bigger current ampere or through hole is  acceptable.