SUN2000-(55KTL, 60KTL) Series
User Manual
5 Electrical Connections
Issue 02 (2017-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
40
Before connecting DC input power cables, ensure that the DC voltage is within the safe
range (lower than 60 V DC) and that the two DC switches on the SUN2000 are OFF.
Failing to do so may result in electric shocks.
When the SUN2000 is grid-tied, it is not allowed to work on DC circuit, such as
connecting or disconnecting a PV string or a PV module in a PV string. Failing to do so
may cause electric shocks or arcing (which may further cause fire).
Ensure that the following conditions are met. Otherwise, the SUN2000 will be damaged, or
even become a fire hazard.
The open-circuit voltage of each PV string is always lower than or equal to 1500 V DC.
The positive and negative terminals of a PV module connect to corresponding positive and
negative DC input terminals of the SUN2000.
Ensure that the PV module output is well insulated to ground.
The PV strings connecting to the same MPPT circuit should contain the same number of
identical PV modules.
During the installation of PV strings and SUN2000, 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 SUN2000. The caused
equipment damage is beyond the warranty scope.
Context
DC terminal selection
Figure 5-11
shows the DC terminals at the bottom of the SUN2000.
Table 5-2
shows the
requirements for selecting DC terminals.
The SUN2000 provides two DC switches, named as, DC SWITCH 1 and DC SWITCH 2. DC SWITCH
1 controls the first to fourth sets of DC input terminals, whereas DC SWITCH 2 controls the fifth to
eighth sets of DC input terminals.
