OC2-Trip (Short-circuit, software monitoring)

What does 12 mean?

This fault indicates a short-circuit condition detected by software monitoring in KSDs. This implies an excessive current draw or unintended electrical path, identified by the drive's software algorithms, which can lead to protective shutdown to prevent hardware damage.

• Excessive current detected by software monitor.
• Short-circuit condition on the motor phase.
• Overload exceeding software trip threshold.
• Faulty current sensor providing incorrect readings.

Click steps to track your progress.

1. 1

   Measure the insulation resistance between motor phases U-V, V-W, U-W using a megger at 500VDC — expect >1 MΩ.

2. 2

   Measure the insulation resistance from each motor phase to ground using a megger at 500VDC — expect >1 MΩ.

3. 3

   Inspect the motor cable for physical damage, pinching, or exposed conductors along its entire length.

4. 4

   Verify that motor parameters (e.g., nominal current, overload limits) stored in the drive match the motor nameplate.