4pole circuit breaker

Update date:2018-06-25 Source:MAXGE

4pole circuit breaker

At present, there are six types of four-pole plastic shell circuit breakers that are available on the domestic market:

 circuit breaker

1. The N pole of the circuit breaker has no over-current release, and the N pole is combined with the other three phase poles together to divide the circuit;

2. The N pole of the circuit breaker does not have an over-current release. The N pole is always connected and is not disconnected with the other three phase poles.

3, circuit breaker N pole with over-current release, N pole and the other three phase pole together with the circuit;

RCCB

4. The N pole of the circuit breaker has an over-current release. The N pole is always connected, and it is not disconnected with the other three phase poles.

5. The N pole of the circuit breaker is equipped with a neutral line breaker, and the N pole is combined with the other three phase poles together to divide the circuit;

6. The N pole of the circuit breaker is equipped with a neutral wire breakage protector. The N pole is always connected and is not disconnected with the other three phase poles.

rcbo

Types 1 and 2 apply to the normal state where the neutral current does not exceed 25% of the phase current (the transformer connection group is labeled Yyno), where type 2 applies to the TN_C system (PEN lines are not allowed to disconnect); types 3 and 4 Applicable to three-phase load imbalance, and there are a large number of electronic equipment (harmonic components) in the load, resulting in N-line current is equal to or greater than the phase current, N-line overload and can not be tripped over the three phase current overcurrent The operation of the device to cut off the overload fault; Type 4 is suitable for TN_C system; Types 5 and 6 are suitable for cutting off the three phases and the neutral line to protect single-phase equipment from damage and accidental electrical accidents when the neutral wire breaks, 6 The model is suitable for the TN_C system.

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Copyright© 2017
www.maxge.com All Rights Reserved.

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