Variable frequency drives themselves are sources of interference. To effectively address this interference through the power lines and other electrical components, a proper grounding method is essential. The purpose of grounding is to exclude this noise (induced electricity caused by the electric field). If it cannot be excluded, it will wander around, of course leading to malfunctions.

Insufficient cross-sectional area of the power line, especially the grounding wire, fails to effectively dissipate induced electricity.

The entire ground wire is live, not only failing to be eliminated but also reversing polarity.

C Line used as neutral causing electrical cabinet leakage

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

1. Motor insulation is damaged, causing a ground short circuit.

2. Wiring 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.