Precautions for Residual Current Transformer wiring
Dec 31, 2021| 1. Be sure to distinguish the phase wires, N wires and PE wires in the power grid before wiring, otherwise problems will occur, resulting in inaccurate measurement data and false alarms.
2. The phase line and the N line must pass through the Residual Current Transformer together, and the PE line cannot pass through the transformer, which will also affect the deviation of the circuit parameters, so be careful.
3. If the N line does not pass through the transformer together with the phase line, once the three-phase load is unbalanced, current will flow through the N line, and the detector will detect the current signal, resulting in misoperation.
4. If the PE line passes through the transformer together with the N line and the phase line, it will also cause an error alarm of the monitoring detector, which will seriously affect the normal operation of its work.
5. The N wires between different circuits should not be connected at many points or repeatedly grounded, otherwise it will cause malfunctions, and an alarm will occur if the leakage current is too large, most of which are caused by this reason.