Mcb Breaker Symbol

Generally an mcb is not repaired or maintained it just replaced by a new one when required.

Mcb breaker symbol. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit its basic function is to interrupt current flow after a fault is detected. The frame of a miniature circuit breaker is a. Electrical drawings symbols symbols used in electrical drawings are set in the basic electrical structure. Electrical symbols are like volt current power circuit breaker distribution board fuse links switch socket isolator light.

Keep in mind that both mcb mccb are low voltage circuit breakers and. Difference between circuit breaker and isolator disconnector so what is the criteria to make a selection of mcb or mccb. On this basis i have incorporated electrical and electronics symbols into this post. Miniature circuit breaker construction is very simple robust and maintenance free.

This type of circuit breaker rated current is below 100 amps. Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. So the electrical department persons should remember its identities. Frame of miniature circuit breaker.

A miniature circuit breaker has normally three main constructional parts. Space can be a point of consideration as mcbs are more compact but it doesn t make a big point as bigger size of mccb brings many advantages too like better fault clearing mechanism. Circuit breakers symbols for use in electrical pneumatic and hydraulic schematic diagrams. It is used for tripping purpose while circuit connection in overload or short circuit situation.

The fuse clearly requires more current to blow it in that time but notice how much bigger both these currents are than the 30 amps marked current rating.