ɲ
/©Low Insulation Resistance alarm is still reported one minute after the
DC is supplied, check the percentage for possible short-circuit positions on the
Alarm details page and go to
Step 4
.
Figure E-1 Alarm details
NO TE
ɲ f¯ÝÑä²ì²üÊʪì²üìàɲÊÃäÑ©Wväìà²ÊªàÑÊÊììÑì¯WvɆÊWvț
ìàɲÊÃäÑ©ì¯äÑÃà²Êüàìàȇf¯WvțìàɲÊÃàÝàäÊìäÝÑä䲲òìăÑ©ǀɟ©Ñàì¯
ä¯Ñàìȝ²àñ²ìÝÑä²ì²ÑÊÊì¯WvɆìàɲÊÃàÝàäÊìäÝÑä䲲òìăÑ©ǁǀǀɟ©Ñàì¯
short-circuit position. Other percentages indicate that the fault occurs on a PV module
or cable in the PV string.
ɲ WÑää²Ã©ñÃìÝÑä²ì²ÑÊɊfÑìÃÊñÉàÑ©WvÉÑñÃä²ÊWväìà²ÊªĂWàÊìªÑ©
possible short-circuit positions. For example, if a PV string consists of 14 PV modules
Êì¯ÝàÊìªÑ©ì¯ÝÑää²Ãä¯Ñàìȝ²àñ²ìÝÑä²ì²ÑʲäǃDŽɟȀì¯ÝÑää²Ã©ñÃì
ÝÑä²ì²ÑʲäDŽȇLJdžȖǁDŽĂǃDŽɟȗȀ²Ê²ì²Êªì¯ì쯩ñÃì²äÃÑìÊàWvÉÑñÃDŽȀ
including the previous and the next PV modules and the cables of PV module 4. The
äÑÃà²Êüàìà¯äìì²ÑÊÝà²ä²ÑÊÑ©ɐǁWvÉÑñÃȇ
Figure E-2 Ēʲì²ÑÊ of the percentage of the short-circuit position
Step 4 Set the DC switch to OFF and check whether the connector or DC cable between
the possible faulty PV modules and the corresponding optimizers, or those
between the adjacent PV modules and the corresponding optimizers are damaged.
ɲ
/©ăäȀàÝÃì¯ÉªÑÊÊìÑàÑàÃȀäìì¯äý²ì¯ìÑKEȀ
and view the alarm information.
–
If the Low Insulation Resistance alarm is not reported one minute after
the DC is supplied, the inspection on the PV string is complete. Choose
Device Commissioning > Maintenance > Inverter ON/OFF on the app
SUN2000-(2KTL-6KTL)-L1
User Manual
E Locating Insulation Resistance Faults
Issue 03 (2020-09-15)
Copyright © Huawei Technologies Co., Ltd.
110
