Huawei SUN2000 MAP0 Series - Connecting DC Input Power Cables

5.5 Connecting DC Input Power Cables
Precautions
D ANGER
● Before connecting the DC input power cables, ensure that the DC voltage is
within the safe range (lower than 60 V DC) and that the DC SWITCH on the
inverter is OFF. Otherwise, the high voltage may result in electric shocks.
● When the inverter is operating, do not perform maintenance or operations on
the DC input power cables, such as connecting or disconnecting a PV string or a
PV module in the PV string. Otherwise, electric shocks may occur.
● If no PV string connects to a DC input terminal of the inverter, do not remove
the waterproof cap from the DC input terminal. Otherwise, the protection level
of the inverter will decrease.
WARNING
Ensure that the following conditions are met. Otherwise, the inverter may be
damaged or even a re may occur.
● PV modules connected in series in each PV string are of the same specications.
● The maximum open-circuit voltage of each PV string must be lower than or
equal to 1100 V DC under any circumstances.
● The polarities of electric connections are correct on the DC input side. The
positive and negative terminals of a PV string connect to corresponding positive
and negative DC input terminals of the inverter.
● If a DC input power cable is reversely connected, do not immediately operate
on the DC SWITCH or positive/negative connectors. Wait until the night when
solar irradiance declines and the PV string current drops to below 0.5 A. Then
set the DC SWITCH to OFF, remove the positive and negative connectors, and
correct the polarities of the DC input power cable.
WARNING
During the installation of PV strings and the inverter, the positive or negative
terminals of PV strings may be short-circuited to ground if the power cables are
not properly installed or routed. In this case, an AC or DC short circuit may occur
and damage the inverter. The resulting device damage is not covered under any
warranty.
SUN2000-(5K-12K)-MAP0 Series
User Manual 5 Electrical Connections
Issue 01 (2024-05-13) Copyright © Huawei Digital Power Technologies Co., Ltd. 50