Leakage circuit breaker in the equipment running for about an hour on the trip is caused by leakage of electricity in the home leakage switch tripped, then the electrical existence of leakage; when the working current is small, the leakage current did not reach the leakage protection switch of the release current, when the appliance is used for a period of time after the working current increases, at this time the leakage current reaches the leakage protection switch of the release current will be tripped.
Because of the tripping caused by leakage, but also because the leakage current is not big, not too easy to find, need an appliance an appliance to try the method, after the tripping can be stopped after a certain appliance, to observe whether the tripping, so that one by one check, and finally can find the problem of leakage.
Extended information
Leakage circuit breaker installation:
1, before installation, should check the leakage circuit breaker nameplate data and the use of the requirements are consistent.
2, the installation should not be too close to the high-current bus and AC contactor.
3, earth leakage circuit breaker action current greater than 15mA, the equipment it protects the shell should be reliably grounded.
4, should give full consideration to the power supply line power supply, voltage and system grounding form.
5, the installation of leakage circuit breaker with short-circuit protection, must ensure that there is enough flying arc distance.
6, combined earth leakage circuit breaker externally connected to the control circuit, should use copper wire, cross-sectional area of not less than 1.5m ㎡.
7, the installation of earth leakage circuit breaker, can not remove the original low-voltage lines or equipment of the original grounding protection measures, while the circuit breaker load side of the neutral line, shall not be shared with other circuits, in order to avoid false operation.
8, the installation must be strictly differentiated between neutral and protective grounding line. Three-pole four-wire and four-pole leakage circuit breaker neutral wire should be connected to the circuit breaker, after the circuit breaker neutral wire can no longer be used as a protective grounding wire, and can not be repeated grounding or connecting the shell of electrical equipment. And the protective ground wire shall not be connected to the leakage circuit breaker.