Vcb Electrical Symbol

Electrical symbols virtually represent the components of electrical and electronic circuits.

Vcb electrical symbol. Circuit breakers symbols for use in electrical pneumatic and hydraulic schematic diagrams. 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. Vacuum circuit breakers are employed for outdoor applications ranging from 22kv to 66kv. The working of vacuum circuit breakers is briefly explained below.

The main aim of any circuit breaker is to quench arc during current zero crossing by establishing high dielectric strength in between the contacts so that reestablishment of arc after current zero becomes impossible. Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. Even with limited rating say 60 to 100mva they are suitable for the majority of applications in rural areas. Though these standard symbols are simplified the function descriptions can make you understand clearly.

The dielectric strength of vacuum is eight times greater than that of air and four times greater than that of sf 6 gas this high dielectric strength makes it possible to quench. One line diagrams 4 16 503 control and wiring diagrams 17 28 506 communication systems 29 510 power lay outs 30 38 520 lighting lay outs 30 38 530. When the breaker operates the moving contact separates from the fixed contact and an arc is struck between the contacts. Electrical design standard symbols.

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