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 set Grounding abnormal shutdown to Disable 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.
– If the PE terminal of the AC connector is not connected, the PE cable on
the enclosure must be a single-core outdoor copper cable with a cross-
sectional area of at least 10 mm
2
.
– Use cables with the same diameter as the AC output power cable and
ground the PE terminal on the AC connector and the ground screws on
the enclosure.
● In some countries and regions, the inverter must have additional ground
cables. In this case, use cables with the same diameter as the AC output
power cable to ground the PE terminal of the AC connector and the ground
screws of the enclosure, respectively.
Procedure
Step 1 Crimp an OT terminal.
● Avoid scratching the core wire when stripping a cable.
● The cavity formed after the conductor crimp strip of the OT terminal is crimped
must wrap the core wire completely. The core wire must make close contact
with the OT terminal.
● Wrap the wire crimping area with heat shrink tubing or insulation tape. The
heat shrink tubing is used as an example.
● Use a heat gun carefully to avoid heat damage to the equipment.
SUN2000-(12K-25K)-MB0 Series
User Manual 5 Electrical Connections
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 40
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