Huawei SUN2000-175KTL-H0 - Page 58

The inverter is integrated with a comprehensive residual current detection unit to
distinguish fault current from residual current. Upon detecting that the residual
current exceeds the threshold, the inverter immediately disconnects from the
power grid.
Cable Connection Precautions
NO TICE
● The cable outer diameter can be measured using the ruler sticker in the
maintenance compartment.
● Ensure that the cable jacket is in the maintenance compartment.
● Ensure that the AC output power cable is secured. Failing to do so may cause
the solar inverter to malfunction or damage to its terminal block by issues such
as overheating.
● The ground point on the enclosure is preferred to connect to the PE cable for
the inverter.
● The PE point in the maintenance compartment is used for connecting to the
PE cable included in the multi-core AC power cable.
● There are two ground points on the chassis shell and you only need either of
them.
● It is recommended that the PE cable of the inverter be connected to a nearby
ground point. For a system with multiple inverters connected in parallel,
connect the ground points of all inverters to ensure equipotential connections
to ground cables.
Cable Specications
● If you connect a ground cable to the ground point on the chassis shell, you
are advised to use a three-core (L1, L2, and L3) outdoor cable or three single-
core outdoor cables.
● If you connect a ground cable to the ground point in the maintenance
compartment, you are advised to use a four-core (L1, L2, L3, and PE) outdoor
cable.
● You need to prepare the OT or DT terminal that matches the cable.
Table 5-1 AC power cable specications
Cable Type
Conductor Cross-
Sectional Area
Cable Outer
Diameter
OT/DT
Terminal
Copper-core cable
50–240 mm
2
● Multi-core
cable: 24–66
mm
● Single-core
cable: 14–32
mm
[1]
M10 (PE)
M12
(L1/L2/L3)
Copper-clad
aluminum cable
and aluminum
alloy cable
● Multi-core cable:
70–240 mm
2
● Single-core cable:
70–240 mm
2[2]
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
User Manual 5 Electrical Connections
Issue 19 (2023-12-20) Copyright © Huawei Technologies Co., Ltd. 48