Siemens 8PV-E02: Siemens SIVACON S8 Error Code 8PV-E02

Symptoms

The 7SK80x ground-fault protection relay trips and the incoming circuit breaker opens. The relay display shows IEE> and the fault current magnitude. The green Ready LED turns off.

Possible Causes

Single-phase insulation fault in a feeder cable or motor winding
Moisture condensation inside the SIVACON compartment due to temperature cycling
Incorrect grounding of cable shields causing circulating currents
Ground-fault current returning through the PE bus due to stray capacitance

Troubleshooting Steps

Step 1: Isolate each outgoing feeder one by one and measure insulation resistance
The faulted feeder shows <1 MOhm while all others read >10 MOhm
Step 2: Inspect the SIVACON room HVAC and humidity levels; check for water ingress in cable trenches
Relative humidity is <60% and no standing water is present in trenches
Step 3: Verify cable shield grounding is done at one end only (typically the switchgear end) per VDE 0295
No circulating currents measured in the PE conductor with a clamp meter
Step 4: Perform a selective ground-fault search by opening feeders sequentially while monitoring the residual current
Fault current drops to zero when the faulted feeder is opened

How to Reset

Reset the 7SK80x relay by pressing the RESET key after isolating and repairing the ground fault. Acknowledge the event log. Reclose the incomer only after verifying zero residual current.

Common Replacement Parts

7SK8011-1EB90-1HE0: Siemens 7SK8011 ground-fault relay (Suitable for SIVACON S8 with residual current transformer 4AM60)

Frequently Asked Questions

Q: How sensitive should the ground-fault setting be for motor feeders?
Typical settings are 10-30% of rated current with a 0.1-0.5s time delay to avoid nuisance trips from switching transients.
Q: Can I operate SIVACON with a persistent ground fault?
No. A ground fault must be cleared immediately to prevent escalation to a phase-to-phase fault or fire hazard.

Siemens SIVACON S8 Error Code 8PV-E02