Installing Dc Input Power Cables - Huawei SUN2000 Series User Manual

SUN2000-(12KTL-25KTL)-M5 Series
User Manual

5.4 Installing DC Input Power Cables

Precautions
● Before connecting the DC input power cable, ensure that the DC voltage is
● When the inverter is operating, it is not allowed to work on the DC input power
● If no PV string connects to a DC input terminal of the inverter, do not remove
Ensure that the following conditions are met. Otherwise, the inverter may be
damaged, or even a fire may occur.
● PV modules connected in series in each PV string are of the same specifications.
● The maximum open-circuit voltage of each PV string must be less than or
● The maximum short-circuit current of each PV string must be less than or equal
● PV strings must be connected in the correct polarity. The positive and negative
● If the DC input power cables are reversely connected, do not operate DC
Issue 01 (2022-06-15)
D ANGER
within the safe range (lower than 60 V DC) and that the inverter DC SWITCH is
OFF. Failing to do so may result in electric shocks.
cables, such as connecting or disconnecting a PV string or a PV module in a PV
string. Otherwise, electric shocks may occur.
the watertight cap from the DC input terminals. Otherwise, the protection level
of the inverter will be affected.
WARNING
equal to 1100 V DC.
to 20 A.
terminals of a PV string connect to the corresponding positive and negative DC
input terminals of the inverter, respectively.
SWITCH or the positive and negative connectors immediately. Wait until the
night when solar irradiance declines and the PV string current drops to below
0.5 A. Then set DC SWITCH to OFF, remove the positive and negative
connectors, and connect the DC input power cables correctly.
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5 Electrical Connections
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