Huawei SUN2000-8KTL-M0 User Manual page 46

SUN2000-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual

Before connecting the DC input power cable, ensure that the DC voltage is within the safe
range (lower than 60 V DC), and that the DC SWITCH is set to the OFF position. Failure
to do so could generate high voltage, which may cause electric shocks.

When the SUN2000 is operating, it is not allowed to operate the DC input power cable,
such as connecting or disconnecting a PV string or a PV module in a PV string. Failing to
do so may cause electric shocks.

If no PV string is connected to a DC input terminal of the SUN2000, do not remove the
watertight cap from the terminal. Otherwise, the IP rating of the SUN2000 will be
affected.
Ensure that the following conditions are met. Otherwise, the SUN2000 may be damaged, or
even a fire could happen.

PV modules connected in series in each PV string are of the same specifications.

The open-circuit voltage of each PV string is always lower than or equal to 1080 V DC.

The maximum short-circuit current of each PV string must be lower than or equal to 15 A.

The DC input power cable is correctly connected. The positive and negative terminals of a
PV module are connected to corresponding positive and negative DC input terminals of
the SUN2000.

If the DC input power cable is reversely connected, do not operate the DC switch and
positive and negative connectors. Wait until the solar irradiance declines at night and the
PV string current reduces to below 0.5 A, and then turn off the DC switch. Remove the
positive and negative connectors to correct the polarity.
Issue 03 (2019-07-19) Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
40