SUN2000-(3.8KTL-11.4KTL)-USL0
User Manual
5 Electrical Connections
Issue 01 (2018-05-21)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
49
The SUN2000 could be damaged, or even become a fire hazard, if the following conditions
are not met:
The positive and negative cables of PV strings are connected to the PV positive (+) and
negative (–) terminals respectively.
The ground cable at the PV side (GND) is connected to the ground point on the PV
module support, ensuring reliable connection between the PV module frame and the
SUN2000 ground point.
The PV terminal of the inverter supports only the optimizer input and cannot be connected
to other power supplies.
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 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. Any such damage is
not covered by the warranty.
Procedure
Step 1
Install the pipe fittings. For details, see
5.2 Installing the Pipe Fittings
.
Step 2
Route the PV input power cable through the conduit and then fitting of the pipe.
Before performing
Step 2
, ensure that the DC switch is OFF.
Step 3
Connect the PV input power cable to the terminal block.
Step 4
Secure the fitting to the conduit.
Step 5
Check that the cables are connected correctly and securely. Then take appropriate measures to
ensure that the pipe conduit and fittings are secured reliably, and seal the cable holes.
Step 6
Keep the maintenance compartment clean.
