Huawei SUN2000-55KTL Series User Manual page 53

SUN2000-(55KTL, 60KTL) Series
User Manual
1. After the positive and negative connectors snap into place, pull test to the DC input cables
is recommended.
2. Only after at least one PV string correctly connects to the MPPT1 circuit, can the
SUN2000 enable the DC input detection function. Therefore, you are required to connect
DC input power cables to the MPPT1 circuit first.
Figure 5-18 Connecting DC input power cables
If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn off
the DC switch immediately or unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused equipment damage is beyond the
warranty scope. Wait until the solar irradiance declines and the PV string current reduces to
below 0.5 A, and then turn off the two DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.
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Issue 06 (2020-01-03) Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
47