Installing Dc Power Cables - Huawei SUN2000-250KTL Series User Manual

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual

5.5 Installing DC Power Cables

Precautions
● Before connecting DC input power cables, ensure that the DC voltage is within
● When the SUN2000 operates in grid-tied mode, do not perform maintenance
Ensure that the following conditions are met. Otherwise, the SUN2000 may be
damaged or even a fire may occur.
● The open-circuit voltage of each PV string must be lower than or equal to 1500
● The polarities of electric connections are correct on the DC input side. The
● Ensure that the PV module output is well insulated to ground.
● The PV strings connecting to the same MPPT circuit should use the same model
● The SUN2000 does not support full parallel connection for PV strings (full
● The SUN2000 does not support Y-branch PV connectors.
● During the installation of PV strings and the SUN2000, the positive or negative
● It is recommended that the positive and negative cables of PV strings be routed
Issue 02 (2022-12-20)
D ANGER
the safe range (lower than 60 V DC) and that ONE-OFF SWITCH and all DC
SWITCH of the SUN2000 are OFF. Otherwise, the high voltage may result in
electric shocks.
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 or arcing (which may cause fire) may occur.
WARNING
V DC under any circumstances.
positive and negative terminals of a PV string connect to corresponding positive
and negative DC input terminals of the SUN2000.
NO TICE
and quantity of PV modules.
parallel connection: PV strings connect to one another in parallel outside the
SUN2000 and then connect to it separately).
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 SUN2000. The resulting device damage is not covered
under any warranty.
in different pipes to prevent short circuits and arcs due to cable damage during
construction.
Copyright © Huawei Technologies Co., Ltd.
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