Figure 5-12 Removing a plug insert
5.6 Connecting DC Input Power Cables
Precautions
● 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
SUN2000 is OFF. Failing to do so may result in electric shocks.
● When the SUN2000 is running, it is not allowed to work on the DC input power
cables, 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 connects to a DC input terminal of the SUN2000, do not remove
the watertight cap from the DC input terminals. Otherwise, the IP rating of the
SUN2000 will be aected.
Ensure that the following conditions are met. Otherwise, the SUN2000 may be
damaged, or even a re could happen.
● The DC input voltage of the SUN2000 shall not exceed maximum input voltage
under any circumstance.
● 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 SUN2000.
● If the DC input power cables are reversely connected, do not operate the DC
switch as well as 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 the DC switch to the OFF position, remove the positive and
negative connectors, and correct the polarities of the DC input power cables.
SUN2000-(2KTL-6KTL)-L1
User Manual 5 Electrical Connection
Issue 04 (2021-04-01) Copyright © Huawei Technologies Co., Ltd. 44
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