No. Name Type Conductor Cross-
Sectional Area
Outer
Diameter
6 (Optional) Grid
scheduling
signal cable
Five-core
outdoor
cable
● The minimum cable diameter must meet local standards.
● The factors that
aect cable selection include the rated current, cable type, routing
mode, ambient temperature, and maximum expected line loss.
5.3 Connecting the Ground Cable
Precautions
● Ensure that the PE cable is securely connected. Otherwise, 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.
● It is recommended that silicone grease or paint be used around the ground terminal
after the PE cable is connected.
Additional Information
The inverter provides the grounding detection function. This function is used to
check whether the inverter is properly grounded before the inverter starts, or
check whether the inverter ground cable is disconnected when the inverter is
running. This function is used to check whether the inverter is properly grounded
under limited conditions. To ensure the safe operation of the inverter, properly
ground the inverter according to the connection requirements of the PE 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 then
disable Grounding abnormal shutdown so that the inverter can run properly.
● According to IEC 62109, to ensure the safe operation of the inverter in the
case of PE cable damage or disconnection, properly connect the PE cable of
the inverter and ensure that it meets at least one of the following
requirements before the grounding detection function becomes invalid.
SUN2000-(12KTL-25KTL)-M5 Series
User Manual 5 Electrical Connections
Issue 03 (2023-02-15) Copyright © Huawei Digital Power Technologies Co., Ltd. 35
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