Figure 5-13 Installation completed
----End
5.6 Connecting DC Input Power Cables
Precautions
● Before connecting DC input power cables, ensure that the DC voltage is within
the safe range (lower than 60 V DC) and that the AUX. SWITCH and all DC
SWITCH of the SUN2000 are OFF. Otherwise, the high voltage may result in
electric shocks.
● When the SUN2000 operates in grid-tied mode, 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 or arcing (which may cause
re) may occur.
● For details about how to remove and insert DC input connectors, see 8.3
Power-O for Maintenance.
Ensure that the following conditions are met. Otherwise, the SUN2000 may be
damaged or even a re may occur.
● The open-circuit voltage of each PV string must be lower than or equal to 1500
V DC under any circumstances.
● The polarities of electric connections must be correct on the DC input side. The
positive and negative terminals of a PV string must be connected to
corresponding positive and negative DC input terminals of the SUN2000.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 5 Electrical Connections
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 54
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