Breaker role

1 Under normal circumstances on and off-load and high-voltage circuit load current. 2 when a system failure and protection devices and automatic device match, quickly cut off the fault electric transformercurrent, prevent the accident, in order to ensure system security run in fact breaker is a switch which switches and other common differences mainly in: 1. apply high voltage level 2 arc media and manner, there is a vacuum, less oil, more oil and sulfur  mcb circuit breaker   etc. 3 interrupter ability and good effect. normal circumstances breaker itself does not exist lubrication issues, often requiring lubrication is its actuator agency.