Abnormal Residual Current

What does 2051 mean?

The insulation impedance of the input (DC) side to PE (Protective Earth) decreases while the SUN2000 is operating. This indicates a potential insulation breakdown or ground fault on the PV side, posing a safety risk.

• The insulation impedance of the input side to PE decreases when the SUN2000 is operating.
• The external power cable may be abnormal temporarily.

Click steps to track your progress.

1. 1

   Check whether the impedance of the PV string to ground is excessively low.