Working voltage of residual current circuit breaker

Operating current of residual current circuit breaker:
The current value at which the residual current circuit breaker protector operates under specified conditions. For example, a 30mA protector will disconnect the power supply when the current value reaches 30mA.

Action time of residual current circuit breaker:
It refers to the time from the sudden application of the rated residual current of the circuit breaker to the moment when the protective circuit is cut off. For example, for a 30mA x 0.1s protector, the time from the current value reaching 30mA to the separation of the main contact does not exceed 0.1s.

Rated working voltage of residual current circuit breaker:
The working voltage of the residual current circuit breaker should adapt to the normal fluctuation range of the power grid and the rated voltage. If the fluctuation is too large, it will affect the normal operation of the protector, especially for electronic products. When the power supply voltage is lower than the rated working voltage of the protector, it will refuse to operate. The rated working current of the residual current circuit breaker protector should also be consistent with the actual current in the circuit. If the actual working current is greater than the rated current of the protector, it can cause overload and cause the protector to malfunction. The reason why a residual current circuit breaker can quickly disconnect in case of a fault is due to the internal release, so it is not whether a release is installed in the residual current circuit breaker, but because there must be a release inside the circuit breaker, otherwise it is not called a residual current circuit breaker.

The release is not calculated based on the number of releases, but based on different parameter values set in practice (such as constant delay release, short delay release, etc.). As long as the current sensing device inside the residual current circuit breaker detects that the current flowing through the circuit breaker reaches a certain set value and time, the residual current circuit breaker will trip. When the power supply voltage is between 75% and 105% of the rated voltage, the voltage loss release ensures that it is engaged, allowing the residual current circuit breaker to close smoothly; When the power supply voltage is below 40% of the rated voltage, the voltage loss release ensures the disconnection, causing the residual current circuit breaker to trip and open. Generally, the normally closed button connected in series in the electromagnetic coil circuit of the voltage loss release can also be used for opening operation.