The reason could be:
- Incorrect service. Solution: Restore correct operating conditions
- Incorrect adjustment. Solution: Adjust brake
- Works in inadequate environmental conditions.
The reason could be:
- Incorrect mains voltage (too low). Solution: Restore correct initial conditions
- Single-phase supply. Solution: Re-check the connection and wiring
- Gap between magnets too wide. Solution: Adjust gap
The reason could be:
- Brake lining worn. Solution: Adjust play or replace lining
- Oil and grease present. Solution: Clean lining
The reason could be:
- Voltage variations exceed the permitted 5%. Solution: Ensure correct mains voltage Not enough cooling air, air ducts may be clogged. Solution: Restore correct air circulation
- Ambient temperature higher than max. permitted temperature. Solution: Restore suitable environmental conditions or adapt motor characteristics to the new conditions
- The machine is not used within the permitted operating conditions. Solution: Adapt real service conditions to suitable conditions
What happens if an electric motor overheats?
If a motor begins to overheat, it can cause damage to the motor’s internals, shortening its life. As stated before, the generated heat is wasted energy being burned off before it can be put to good use.
The reason could be:
- No maintenance. Solution: Restore correct operating conditions or replace the contactor.
- Unsuitable environmental conditions or unforeseen use.
What causes contactor to stick?
Electrical contacts may stick when they open and close. Small sparks known as “arcs” can corrode the metal and contribute to sticking.
The reason could be:
- Jammed. Solution: Check pushbutton strip wires
The reason could be:
- Block jammed. Solution: Clean and restore initial conditions
- Connections are interrupted. Solution: Clean
The reason could be:
- No mains power supply. Solution: Restore the correct voltage
- Incorrect adjustment. Solution: Adjust the brake
The reason could be:
- Incorrect service. Solution: Restore correct operating conditions
- Incorrect adjustment. Solution: Adjust brake
- Works in inadequate environmental conditions.
The potential problem could be:
- Load limiter (hoist)
- General power line
- The motor (or motor brake)
- Limit switch: up/down or travel
- Some issue in electrical control panel: contactors, MCB, fuses, low voltage transformer
- Control unit: pendant push-button, radio-batteries
- Hoist’s and trolley’s power cable
The reason could be:
- Brake lining worn. Solution: to adjust or to replace lining
- Oil and grease present. Solution: to clean lining
- Incorrect mains voltage (too low). Solution: Restore correct initial conditions
- Single-phase supply. Solution: Check or re-connect the power supply connections
- Gap between magnets too wide. Solution: Adjust gap