How does the residual current sensor do residual current protection

- Oct 04, 2019-

The residual current sensor detects the leakage current, and the neutral current does not belong to the leakage current. That is to say, the residual current sensor needs to be bundled with three live wires and one neutral wire (if any). When there is no leakage current, the vector sum of the currents of the live wire and the neutral wire is equal to zero, and when there is leakage, the live wire and the neutral wire The vector sum is the leakage current.