Short circuit in motor output terminals

¿Qué significa F1.1 ?

An overcurrent or faulty output stage control has been detected, causing the output stage to be inhibited by hardware. This often indicates a short circuit at the motor output, excessive motor current, or a defective power output stage. Failure to resolve risks severe damage to the drive and connected motor.

• Short circuit between two motor phases (U-V, V-W, U-W) in the motor cable or motor windings.
• Short circuit between any motor phase (U, V, W) and ground (PE) in the motor cable or motor's connection box.
• Damaged motor cable insulation due to mechanical stress, abrasion, or chemical exposure.
• Internal winding short circuit within the motor (e.g., turn-to-turn fault) causing excessive current draw.
• Motor current exceeding the drive's instantaneous overcurrent limit (e.g., 200% of rated output current).

Haga clic en los pasos para seguir su progreso.

1. 1

   Disconnect motor power cable from drive output terminals (U, V, W). Measure resistance between each phase terminal (U-V, V-W, U-W) and each phase to ground (U-PE, V-PE, W-PE).

2. 2

   Verify motor cable insulation integrity using a megohmmeter (megger) test at 500VDC or 1000VDC from each phase to ground and phase to phase.

3. 3

   Visually inspect the motor cable for any signs of damage, cuts, or abrasion, especially where it enters conduits or passes through glands.

4. 4

   Measure the motor winding resistance (U-V, V-W, U-W) at the motor terminals and compare to the motor's nameplate data or specifications.

5. 5

   Check drive parameters P3-01 (Motor rated current) and P3-02 (Motor overload factor) to ensure they are correctly set for the connected motor.