Overload is one of the main reasons for engine failure. Let's look athow overload damages the motorand how to protect yourself.
Damage mechanism
When overloaded, the motor consumes a current higher than the rated one. More current means more heating of the winding. The insulation begins to work at temperatures above the permissible temperature, and exceeding it by just 8–10 °C reduces its service life by half. As a result:
- The winding overheats.
- The insulation ages quickly.
- An interturn short circuit occurs.
- The motor burns out.
Types overload
| Type | Example |
|---|---|
| Mechanical | Stuck, increased load |
| Electrical | Phase loss, low voltage |
| Thermal | Poor cooling, frequent starts |
How to protect yourself
- Thermal relay - correctly configured according to the rated current.
- Phase control relay - against phase loss.
- Correct selection of engine power.
- Control of coolingand load.
Almost overload always preventable with the right protection. If the motor has already been damaged, rewind will be required to eliminate the cause of the overload. Diagnosis of the cause is carried out during inspection.
Do engines burn out from overload in Tashkent? Elektromotors engineers will repair and select protection - leave a request.