Variable frequency drives are themselves sources of interference. To effectively mitigate this interference through the power lines to other electrical components, the solution is to implement proper grounding. The purpose of grounding is to exclude this noise (induced by electromagnetic fields), as it cannot be excluded; otherwise, it will wander around, of course leading to malfunctions.

A: Insufficient cross-sectional area of the power line, particularly for the grounding wire, which fails to effectively dissipate induced electricity.

The entire grounding wire is live, not only failing to exclude but also reversing phase into the circuit.

C Line used as neutral causing electric cabinet leakage

Damage to the power line jacket caused a short circuit and leakage.

1. Motor insulation is damaged, resulting in a ground short circuit.

2. Wire connection errors, such as connecting PE and N incorrectly, leading to leakage occurrences.

3. False alarms caused by strong interference from the surroundings.

4. The grounding wire is not properly connected, or the grounding resistance is insufficient.