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Error Code - 313 - Low Insulation Resistance - Alarm Severity Major

Alarm ID
Alarm Name
Alarm Severity
Possible Cause
Low Insulation Resistance
Cause ID = 1
  •  A short circuit occurs between the PV string and the PGND cable.
  •  The PV string is installed in a moist environment for a long time.
1. Check the PV string and the PGND cable. If a short circuit occurs, rectify the fault.
2. If you are sure that the impedance is less than the default value in a cloudy or rainy environment, log in to the SUN2000 APP, SmartLogger, or NMS and set Insulation resistance protection.

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