Ingeteam Ingecon Sun Power Series Installation Manual page 42

Ingeteam Power Technology, S.A.
If there is an insulation fault in the system on the same pole connected to ground by the protection, this fault is not
detected. This situation does not generate current flow.
In this situation there is no reason for a second fault to be detected by the protection. Since two return paths are
created, one by the protection and one by the insulation fault of the second pole.
To avoid this situation, check that there are no insulation faults in the grounded pole by inspecting the installation.
This procedure should be carried out in compliance with the security measures described in this manual.
Turn off the unit to perform the following procedures
1. Measure the voltage between positive and negative in the panel (Voc)
2. Measure the voltage between the positive pole and ground (VP)
3. Measure the voltage between the negative pole and ground (VN)
The PV array will be properly insulated if VP and VN are less than the value of Voc divided by two.
If VP or VN have a value greater than Voc/2, the PV array will have faulty insulation in one of its parts.
The protection will be monitored by the inverter control, and when the breaker opens the connection of the PV array
to ground, the control will shut down the unit, triggering the 0x0200 DC Protection alarm.
24
+PV
-PV
Q10
no current present
+PV
-PV
Q10
Installation manual
AAS2000IKI01