Huawei SUN2000L User Manual page 52

SUN2000L-(2KTL-5KTL)
User Manual





Context
Figure 5-11 DC input terminals
(1) The first set of DC input terminals
Procedure
Step 1 Assemble the black positive and negative connectors.
Use the positive and negative metal terminals and DC connectors supplied with the
SUN2000L. 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 02 (2017-12-12)
The open-circuit voltage of each PV string is always lower than or equal to 600 V DC.
The positive and negative terminals of a PV string connect to corresponding positive and
negative DC input terminals of the SUN2000L.
If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn
off the DC switch immediately or unplug positive and negative connectors. Wait until the
solar irradiance declines at night and the PV string current reduces to below 0.5 A, and
then turn off the DC switch and remove the positive and negative connectors. Correct the
string polarity before reconnecting the string to the SUN2000L.
Since the output of the PV string connected to the SUN2000L cannot be grounded, ensure
that the PV module output is well insulated to ground.
During the installation of PV strings and SUN2000L, the positive or negative terminals of
PV strings may be grounded if power cables are not properly installed or routed. In this
case, an AC or DC short circuit may occur and damage the SUN2000L. This damage is not
covered under any warranty or service agreement.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
(2) The second set of DC input terminals
45