High Voltage Circuit Breaker Symbol

It is so designed that it can be operated manually or by remote control under normal conditions and automatically under fault conditions.

High voltage circuit breaker symbol. 47 phase sequence voltage relay 48 incomplete sequence relay 49 machine or transformer thermal relay 50 instantaneous overcurrent 51 ac time overcurrent relay 52 ac circuit breaker 53 exciter or dc generator relay 54 high speed dc circuit breaker 55 power factor relay 56 field application relay 59 overvoltage relay 60. Fuse represents low voltage and power fuses. This symbol represents circuit breaker with three poles. It connects three phases whenever there is an overload or short circuit in any phase the circuit breaker trips all three phases simultaneously.

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. Disconnect switch represents a switch in low or high voltage applications open position shown. Non drawout circuit breaker represents a fixed mounted low voltage circuit breaker. There are several main types of high voltage circuit breakers in use nowadays.

Removable drawout circuit breaker represents a drawout low voltage circuit breaker. Electrical one line diagram symbols one line diagrams are an important means of communicating the components relationships and connections within a circuit or electrical system. The one line diagram symbols presented here are commonly accepted symbols.