Air Circuit Breaker Symbol

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Air circuit breaker symbol.

Such kind of breakers is used in three phase systems in industries. Air circuit breaker acb air circuit breaker acb is an electrical protection device used for short circuit and overcurrent protection up to 15kv with amperes rating of 800a to 10ka. The main points of contacts are made in the shape of two horns. An air circuit breaker also known as an air blast circuit breaker or acb is an automatically operated electrical switch that uses air to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. It operates in air where air blast as an arc quenching medium at atmospheric pressure to protect the connected electric circuits. Plain brake air circuit breakers are the simplest form of air breakers. Its primary function is to interrupt current flow after a fault is detected.

It connects three phases whenever there is an overload or short circuit in any phase the circuit breaker trips all three phases simultaneously. Circuit breakers symbols for use in electrical pneumatic and hydraulic schematic diagrams. This symbol represents circuit breaker with three poles.