● If the DC input power cable is reversely connected and DC switches are set to
ON, do not immediately turn o the DC switches or reconnect the positive and
negative connectors. Otherwise, the device may be damaged. The caused
device damage is not covered under any warranty. Wait until the solar
irradiance declines at night and the PV string current reduces to below 0.5 A.
Then, turn
o the three DC switches, remove the positive and negative
connectors, and rectify the connection of the DC input power cable.
● Connect the PV string connector to the inverter connector, and then pull back
the PV string connector along the axial direction to check whether the
connectors are securely connected.
● The connector must be securely connected. Damages caused by improper
connection are not covered under the warranty.
Figure 5-25 DC input power cabling requirement
During DC input power cabling, leave at least 50 mm of slack. The axial tension
on PV connectors must not exceed 80 N. Radial stress or torque must not be
generated on PV connectors.
----End
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 11 (2021-11-10) Copyright © Huawei Technologies Co., Ltd. 65
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