Leakage circuit breakers are generally divided into two-pole, three-pole, and four-pole types, which are used in different lines. Only when they are correctly selected and used can they play their due role.
Choice of circuit breaker
(1) The rated voltage and current of the circuit breaker should be greater than or equal to the normal operating voltage and current of the line equipment;
(2) The leakage current to be protected by the line should be less than or equal to the specified leakage protection current of the circuit breaker;
(3) The maximum switching capacity of the circuit breaker should be greater than or equal to the maximum short-circuit current of the circuit;
(4) The rated current of the overload release is greater than or equal to the maximum load current of the line;
(5) It has a shorter breaking reaction time and can play a role in protecting the line and equipment.
Selection And Correct Use Of Circuit Breakers
Jul 10, 2024
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