Variable frequency drives are themselves a source of interference. To effectively mitigate this interference transmitted through 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, leading to potential faults.

Insufficient cross-sectional area of the power line, particularly the grounding wire, which fails to exclude induced electricity.

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

C Line used as neutral causing electric cabinet leakage

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

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

2. Wire connection errors, such as misconnecting PE and N, 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.