A breakdown of the winding to the housing is a dangerous malfunction: the motor “shocks” and poses a threat. Let's look at how to carry out checking a motor for a breakdown on the frame.
What is a breakdown on the frame
This is a short circuit of the winding to the metal body of the motor due to destruction or moistening of the insulation. As a result, a dangerous potential appears on the housing.
How to check
- De-energize and disconnect the motor from the network.
- Measure the resistance between the winding terminal and the housing using a megohmmeter.
- Evaluate the result.
| Result | Terminal |
|---|---|
| High resistance | Insulation is intact |
| Reduced | Humidification - needs drying |
| Close to zero | Breakdown on the body |
Signs of breakdown in operation
- The motor “electric shocks” when touch.
- The RCD or differential protection is triggered.
- The machine knocks out when turned on.
What to do
A damaged engine cannot be operated - it is dangerous. If the reason is moisture, drying the windings helps. In case of real destruction of insulation, rewinding is needed. An accurate diagnosis is provided by diagnostics.
Does the engine give an electric shock or knock out the protection in Tashkent? Elektromotors engineers will check the insulation and eliminate the breakdown - contact us.