5.4 Installing the AC Output Power Cable
Precautions
A three-phase AC switch needs to be congured outside the AC side of the
SUN2000. To ensure that the SUN2000 can safely disconnect from the power grid
under abnormal conditions, select an appropriate overcurrent protection device
according to local power distribution regulations.
Model Recommended Overcurrent
Protection Device Specications
SUN2000-70KTL-C1 125 A
SUN2000-75KTL-C1 125 A
Do not connect loads between the SUN2000 and the AC switch.
The SUN2000 is integrated with a comprehensive residual current monitoring unit
(RCMU) to distinguish fault current from residual current. Upon detecting that the
residual current exceeds the threshold, the SUN2000 immediately disconnects
from the power grid.
● If an AC switch that can detect residual current is installed outside the SUN2000-70KTL-
C1, the residual current value to trigger the switch should be greater than 770 mA.
● If an AC switch that can detect residual current is installed outside the SUN2000-75KTL-
C1, the residual current value to trigger the switch should be greater than 825 mA.
Wiring Precautions
Ensure that the SUN2000 PE cable is securely connected. Otherwise the repair of
the built-in PID would be aected.
● The ground point on the enclosure is preferred to connect to the PE cable for
the SUN2000.
● The ground point in the maintenance compartment is mainly used for
connecting to the ground cable included in the multi-core AC power cable.
● There are two ground points on the enclosure and you only need either of
them.
SUN2000-(70KTL, 75KTL)-C1
User Manual 5 Electrical Connections
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 40
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