Electrical equipment

Circuit breaker

The role of a circuit breaker

Breaker, an electromechanical device that allows connection to turn the power of one or more circuits in case of overcurrent or overload, aims to protect:

  • Electrical installations, current intensities too high may damage them;
  • And men of electrocution.

With this system, there are no fuses to change. To turn the system on, just turn the switch to « on » position, course after setting the incident causing the overload or short-circuit.

Its main function is to protect the circuit that feeds.

Different types of circuit breaker

There are several types of circuit breaker:

  • The magnetic circuit breakers, which provides protection against short-circuits,
  • The thermal circuit breakers, which provides protection against overload,
  • Thermomagnetic circuit breakers, which provides protection against short-circuits and overloads,
  • The electronic circuit breakers, which perform functions triggers thermal and / or magnetic, while providing a wide range of settings (trigger level, the trigger delay)
  • Switches and magneto-thermal differential circuit breakers, which protects against short circuit, overload and protection of persons against indirect contact.

The general construction of a circuit breaker

A circuit breaker is a combination of a set of contacts with a large breaking capacity and a system for protection against overloads and short circuits.