What are the main technical parameters of the leakage circuit breaker?

De : TAIXI Fecha : 2017-07-28Vistas : 310

Residual current circuit breakers' main operating performance parameters are: rated residual current current, rated residual current action time, rated residual current current is not action. Other parameters are: power frequency, rated voltage, rated current and so on.
1. Rated residual current current in the specified conditions, so that the residual current circuit breaker action. For example, 30mA circuit breaker, when the input current value of 30mA, the circuit breaker is the action to disconnect the power.
2. Rated residual current action time is from the sudden application of the rated leakage current from the protection circuit is cut until the time. For example, 30mA × 0.1s circuit breakers, from the current value of 30mA, to the main contact separation time of not more than 0.1s.
3. Rated residual current current does not act under the specified conditions, the leakage circuit breaker does not act the current value, the general should be selected leakage leakage current value of one-half. For example, the leakage current of 30mA leakage circuit breaker, the current value of 15mA or less, the circuit breaker should not be activated, or because the sensitivity is too easy to malfunction, affecting the normal operation of electrical equipment.
4. Other parameters such as: power frequency, rated voltage, rated current, etc., in the selection of leakage circuit breakers, should be used with the line and electrical equipment to adapt. Leakage circuit breaker operating voltage to adapt to the normal fluctuation range of the grid rated voltage, if the fluctuations are too large, will affect the normal work of the protector, especially electronic products, power supply voltage is lower than the rated voltage of the protector will refuse to action. The rated operating current of the leakage circuit breaker 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, the overload and the protector malfunction.