Leakage circuit breakers should pay attention to the problem in use - Solutions - Huaqiang Electronic Network

Photocoupler

1 . In the event of leakage, the leakage circuit breaker protects the switch by the action mechanism, and the signal source of the action mechanism is obtained from the main circuit power supply. Therefore, the user should connect the power supply according to the requirements of the manual, and there must be no misconnection or leakage. Phenomenon
2 . The protection function of the leakage circuit breaker has certain conditions. The overload, short circuit and leakage protection have certain quantity index requirements, that is to say, the current value or the residual action current value switch cannot be operated. These projects are commissioned and inspected by special equipment in the manufacturing plant. Some users directly short-circuit the power supply or connect the power cable to the wet ground to check whether the product is qualified. This is a wrong detection method. First, this method itself has great danger and is prone to accidents. Second, the test current unconfirmed. If the user chooses a regular brand and has passed the national compulsory certification (such as CCEE certification, CCC certification, etc.), the product quality can be guaranteed. If there is no special equipment, it is generally unnecessary to use some non-standard methods to test and pass the test. The button can be used to determine if the product is normal.
3 . Most of the products circulating on the market are electronically structured products. In accordance with the relevant national standards, when the product is tested for power frequency withstand voltage or insulation resistance in the closed state, the electronic components (circuit boards) should be disconnected. The leakage protection function of the product is damaged by high voltage. The typical phenomenon is that the circuit breaker cannot be closed after the power is added to the incoming end.
4 . There are strict requirements for the incoming line of the leakage circuit breaker. The user must install and wire according to the requirements of the manual. Under no circumstances should the lower incoming line be used. Otherwise, the switch will be damaged when the line fails, and even cause personal and property damage.