Overcurrent

What does 13 mean?

The inverter's peak current limit has been exceeded, causing the frequency converter to trip into an alarm state after approximately 1.5 seconds of warning. This typically indicates a sudden increase in motor load, such as shock loading, a jam, or excessively fast acceleration of high-inertia loads. Persistent overcurrents can severely stress and damage the frequency converter's power components and the motor.

• Sudden mechanical jam, blockage, or excessive load applied to the driven equipment.
• Insufficient acceleration ramp time (e.g., P1-04 Acceleration Ramp 1) for the motor and load inertia.
• Motor winding insulation breakdown resulting in a phase-to-phase or phase-to-ground fault.
• Incorrect motor parameters (e.g., P1-20 Motor Current, P1-21 Motor Voltage) entered into the drive.
• Rapid change in load or speed without adequate drive response capability, leading to current spikes.

Click steps to track your progress.

1. 1

   Inspect the driven machinery for mechanical binding, obstructions, or debris. Manually rotate the motor shaft (power off) to check for free movement.

2. 2

   Measure motor winding resistance (U-V, V-W, W-U) at the motor terminals to detect a phase-to-phase short circuit (expect balanced, low resistance).

3. 3

   Increase acceleration ramp time (e.g., P1-04) and deceleration ramp time (e.g., P1-05) by 20-50% to reduce current peaks during transients.

4. 4

   Verify drive parameters P1-20 (Motor Current), P1-21 (Motor Voltage), and P1-23 (Motor Frequency) match the motor nameplate data.

5. 5

   Monitor the output current (e.g., LCP display, parameter 16-14) during start-up or load application to pinpoint the exact peak current event.