Huawei SUN2000-50KTL-JPM0 - Page 48

SUN2000-(50KTL-JPM0, 50KTL-JPM1, 63KTL-JPM0)
User Manual
5 Electrical Connections
Issue 01 (2018-09-30)
Copyright © Huawei Technologies Co., Ltd.
42

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 short-circuited to ground 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.
Terminal Description
The SUN2000 provides 12 DC input terminals, among which terminals 1 to 6 are controlled
by DC switch 1 and terminals 7 to 12 are controlled by DC switch 2.
Figure 5-13 DC terminals
Select DC input terminals according to the following rules:
1. Evenly distribute DC input power cables on the DC input terminals controlled by the two
DC switches.
2. Maximize the number of connected MPPT circuits.
Cable Specifications
Cable Type
Conductor
Cross-Sectional Area
(mm
2
)
Cable Outer Diameter
(mm)
PV cable that meets the 1100 V
standard
4.0–6.0 (12–10 AWG)
4.5–7.8
Cables with high rigidity, such as armored cables, are not recommended, because poor contact
may be caused by the bending of the cables.