Motor overload temperature

What does 10 mean?

The electronic thermal protection (ETR) indicates the motor is too hot. The drive issues a warning or alarm when the internal counter exceeds 90% (depending on parameter 1-90) and trips when it reaches 100%, typically due to prolonged operation above 100% overload.

• Motor operating continuously above its rated current (e.g., due to mechanical overload on driven equipment).
• Incorrect setting of motor thermal protection parameters (e.g., P1-90 Motor Thermal Protection value too low).
• Inadequate motor cooling (e.g., blocked fan, dirty cooling fins, high ambient temperature exceeding motor rating).
• Motor's nominal current (P1-24) or rated speed (P1-25) incorrectly configured, leading to inaccurate ETR calculation.
• Mechanical issues in the driven load (e.g., binding bearings, misalignment) increasing motor current draw.

Click steps to track your progress.

1. 1

   Measure the actual motor current (e.g., using a clamp meter) and compare it to the motor's nameplate rated current.

2. 2

   Verify motor thermal protection parameters (e.g., P1-90, P1-92, P1-93) are correctly set according to motor specifications.

3. 3

   Inspect the motor's cooling fan for obstruction or damage and clean any accumulated dirt from the motor housing and fins.

4. 4

   Check for mechanical binding or excessive friction in the driven equipment by manually rotating the shaft (if safe).

5. 5

   Monitor the motor's winding temperature directly (if possible, with a thermal camera) to confirm actual overheating.