As we known,Molded Case Circuit Breaker main function is protection device from overload current and short circuit.It also have a several attachment device for additional protection that we can combine with MCCB.
Common accessories used for MCCB such as phase insulation barrier,Shunt trip,Under voltage trip device,rotary handle and change over system.It can provide more protection function that we want add to the application.
Circuit breaker is the one of important protection device when installing of electrical induction motor.This time i want shared some information about the major parameter that we need consider when applying Molded case circuit breaker(MCCB) for electric motor.
If we not selected the right MCCB for our electric motor application,it will effected to the system and it not running smooth and achieve our expectation.It will cause a additional costing for upgrading and repairing jobs.
As we know vacuum mean the the pressure is maintained below atmospheric pressure( unit : mm Hg ).So the manufacture made a research and development to design the vacuum circuit breaker based on current cannot jump in vacuum condition.
Vacuum Circuit Breaker used the vacuum pressured to extinguish the current arc when it switching.Normally this type of circuit breaker used for medium voltage ( 1 – 35 kV ) power supply.The ampere rating for vacuum circuit breaker is until 3000 ampere.
The circuit breaker maintenance is very important and it must added in periodical maintenance schedule.Why it so important?It is because of their importance for routine switching and for equipment protection and person.
Production will stop if circuit breaker fails to operate because of a lack of preventive maintenance.The cost will rise for repairing jobs and it not good for business.We must avoid from this unwanted situation because of not done the circuit breaker maintenance.