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Domain Knowledge

The selection of leakage protection

The selection of leakage protection devices should take into account various factors. Among them, the first is to correctly select the leakage current of the leakage protection device.

In locations where there is a high risk of electric shock in bathrooms, swimming pools, tunnels, etc., high-sensitivity, fast leakage protection devices should be used (operating current should not exceed 10 mA). If an electric shock accident occurs at the installation site and can be helped by other people to get out of the power supply in time, the operating current of the leakage protection device can be greater than the current. If the protection device is a quick protection device, the operating current can be selected according to the ventricular fibrillation current. If it is the pre-stage protection, that is, the total protection in front of the protection, the operating current can exceed the ventricular fibrillation current.


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