What are the characteristics of the TN-CS power supply system?
Answer: (1) The TN-CS system can reduce the voltage of the motor casing to ground, but this voltage cannot be completely eliminated. The magnitude of this voltage depends on the load imbalance and the length of the line. It is required that the load unbalance current should not be too large, and repeated grounding should be performed on the PE line.
(2) The PE line cannot enter the leakage protector under any circumstances, because the leakage protector at the end of the line will cause the front leakage protector to trip and cause a large-scale power outage.
(3) For the PE line, except for the N-line at the header, the N-line and the PE line must not be connected to each other. No switches or fuses are allowed on the PE line.
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