What is a Circuit Breaker? Vacuum circuit breaker working function
What is a circuit breaker?
A circuit breaker is an electrical device that is used to interrupt electrical power. A circuit breaker is like a heavy switch that is used to switch on and off heavy electrical power. A special arrangement is made to quench the arc produced between switching contacts during circuit interruption. For the purpose of arc quenching, air, sf6 gas, or vacuum is used in the circuit breaker.
Types of circuit breaker
A circuit breaker is categorized in many ways. Different types of circuit breakers are used according to needs and requirements.
Circuit breaker types according to voltage
LV circuit breaker
LV circuit breaker is used on low voltage to interrupt electrical power. Air is normally used as arc quenching media in such kind of circuit breakers.
MV circuit breaker
MV circuit breakers are used to interrupt medium voltage in industry and power distribution substations. Vacuum and oil are used as arc quenching media in such kind of circuit breakers.
HV circuit breaker
HV circuit breakers are used to interrupt very high voltage power. SF6 gas is used as quenching media in such kind of circuit breakers.
Parts of Circuit breaker
There are many parts of a circuit breaker. A circuit breaker is a piece of complex electrical equipment having many parts like contacts, springs, levers, hinges, and many other parts. The following diagram shows common parts for a circuit breaker.
Circuit breaker parts |
- The Charging mechanism of the gearbox
- The Charging flange
- The Driver
- The Spring charging motor
- The Limit switches
- The Manual spring charging port
- The Close pushbutton
- The Close coil 52SRC
- The Open pushbutton
- The trip coil 52T
- The Closing spring charge indicator
- The Linkage
- The Control lever
- The Close-open indicator
- The Operation counter
- The Operator housing
- The Shock absorber
- The Closing spring
- The Charging shaft
- The Crank
- The Cam disc
- The Lever
- The Pawl roller
- The Close latch pawl
- The Drive lever
- The Trip free coupling rod
- The Spring return latch
- The Trip free coupling lever
- The Jackshaft
- The Lever - phase C
- The Lever - phase B
- The Lever - phase A
- The Opening spring
- The Auxiliary switch
- The Auxiliary switch link
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