SUN2000-(5KTL, 6KTL)-M0
User Manual
5 Electrical Connections
Issue 03 (2019-07-19)
Copyright © Huawei Technologies Co., Ltd.
31
No.
Name
Type
Specifications
4
(Optional) Power grid
scheduling signal cable
Five-core outdoor cable
Conductor cross-
sectional area: 0.2–1
mm
2
Cable outer diameter:
4–11 mm
5
AC output power cable
Outdoor copper cable
Conductor cross-
sectional area: 4–6
mm
2
Cable outer diameter:
10–21 mm
6
PE cable
Single-core outdoor
copper cable
Conductor cross-
sectional area ≥ 4 mm
2
5.2 Connecting the PE cable
Precautions
Ensure that the PE cable is properly connected. If it is disconnected or loose, electric
shocks may occur.
Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks
may occur.
The PE point at the AC output port is used only as a PE equipotential point, and cannot substitute for
the PE point on the enclosure.
After the ground cable is installed, it is recommended that the silica gel or paint be applied to the
ground terminal for protection.
Additional Information
The SUN2000 has the grounding detection function. This function detects whether the
SUN2000 is grounded properly before its startup, or whether the ground cable is disconnected
when the SUN2000 is running. This function works under limited conditions. To ensure the
safe operation of the SUN2000, ground the SUN2000 properly according to the connection
requirements of the PGND cable. For some power grid types, if the output side of the inverter
is connected to an isolation transformer, ensure that the inverter is properly grounded and set
Isolation settings
to
Input not grounded, with a transformer
to enable the inverter to run
properly.
According to IEC62109, to ensure safe application in case of the ground cable is
damaged or disconnected, connect the PE cable properly before the grounding detection
function is disabled. Ensure that the PE cable meets at least one of the following
requirements.
