Grounding is a simple but vital safety measure. It protects people from electric shock due to insulation breakdown. Let's look at why grounding an electric motor is necessary.
How does grounding protect?
When a winding breaks down on the body without grounding, a dangerous potential appears on the metal - the motor “shocks with current”. Grounding drains the leakage current into the ground and ensures that the protection (automatic device, RCD) is triggered.
What to check
- Presence and integrity of the grounding conductor.
- Reliability of the grounding contact on the engine body.
- Absence of corrosion at the connection point.
- Compliance with the cross-section of the grounding conductor conductor.
Signs of problems with grounding
| Symptom | Cause |
|---|---|
| The motor “pinches” with current | No or poor grounding + leakage |
| The breakdown protection does not work | Breakage grounding |
Important:the feeling of current from the body is a signal not only of poor grounding, but also of insulation breakdown. Grounding protects, but the cause itself (breakdown) must be eliminated - often this is rewinding or drying.
Is the motor receiving an electric current or do you have questions about grounding in Tashkent? Elektromotors engineers will check the insulation and safety - leave a request.