Views: 1742 Author: Site Editor Publish Time: 2017-04-17 Origin: Site
Residual current is to point to by the movements of the residual current protection device of main loop (zero sequence current transformer) current instantaneous value vector and, expressed in the RMS for single-phase circuit, residual current is the phase of leakage current; For three-phase line, residual current is the current instantaneous value vector and, with its RMS said.
The effect of residual current circuit breaker is the leakage protection and overload protection, residual current circuit breaker is residual current detection, and residual current circuit breaker is a form of leakage protector, similarity and residual current circuit breaker is a circuit leakage protection.
Residual current circuit breaker is under prescribed conditions, when the protection of residual current in the circuit exceeds the set value, can automatically disconnect circuit or signal alarm relay protection device. It's easy to understand the function of residual current circuit breaker.
Residual current circuit breaker using automatic cut off power supply protection principle. In direct contact with the protection as a basic protection against electric shock risk of additional protection; As to prevent due to ground fault in indirect contact protection to electrical equipment exposed conductive part with dangerous voltage electric shock caused harm or limited protection of electric fire danger. It is an essential part of protection device in residual current circuit breaker.
Residual current circuit breaker is mainly composed of four basic links, namely, signal detection, signal processing, actuators and test apparatus.
Can replace residual current circuit breaker with residual current circuit breaker in the home, basic is the same principle.