Huawei SUN2000-2KTL-L1 User Manual page 51

SUN2000-(2KTL-5KTL)-L1
User Manual





Figure 5-13 DC input terminals
(1) Terminals of DC input 1
Procedure
Step 1 Assemble a DC connector.
Use the Staubli MC4 positive and negative metal terminals and DC connectors delivered with
the SUN2000. Using incompatible positive and negative metal terminals and DC connectors
may result in serious consequences. The caused device damage is not covered under any
warranty or service agreement.
Issue 01 (2020-04-17)
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.
Since the output of the PV string connected to the SUN2000 cannot be grounded, ensure
that the PV module output is well insulated to ground.
During the installation of PV strings and the SUN2000, the positive or negative terminals
of PV strings may be short-circuited to ground if the power cable is not properly installed
or routed. In this case, an AC or DC short circuit may occur and damage the SUN2000.
The caused device damage is not covered under any warranty or service agreement.
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connection
(2) Terminals of DC input 2
45