Breaker

Brief introduction
Breaker is able to closing, carrying and breaking currents under normal circuit conditions, and can closing, within a specified period of time carrying and breaking

abnormal circuit conditions (including short-circuit conditions) under the current switching devices.
Circuit breaker can be used to distribute power, not frequently start asynchronous motors, power lines and motors for the implementation of protection when they

happen severe overload or short circuit and undervoltage fault can automatically cut off the circuit is functionally equivalent fuse switch and the over-under thermal

relay combination. But also in breaking the fault current is usually not needed to change parts. At present, has been widely used.
Key Features
Breaker main characteristics: Rated voltage Ue; Rated current In; overload (Ir or Irth) and short-circuit protection (Im) tripping current setting range; rated short-

circuit breaking current (industrial breaker Icu; household breaker Icn ), etc.
A circuit breaker is a basic low-voltage electrical, mcb circuit breaker with overload, short circuit and under voltage protection, the protection circuit and power

capabilities.
Works

Breaker generally contact system, arc system, operating mechanism, release, shell composition.

When shorted, large current (generally 10-12 times) to overcome the magnetic field generated by the reaction force spring release mechanism is actuated pulling

operation, switch instantaneous trip. When overloaded, the current becomes large, the heat intensifies, the bimetal deformed to a certain extent promote the agency

action (the larger the current operating time is shorter).

E-now, the use of the phase current transformers collection size, compared with the set value, the microprocessor when the abnormal current signal, the electronic

release mechanism is operated to drive operation.

The role of the circuit breaker is switched off and the load circuit, and cut off the fault circuit to prevent accident and to ensure safe operation. The high voltage

circuit breakers to breaking 1500V, current 1500-2000A arc, the arc can be stretched to 2m these still continue to burn is not extinguished.