Huawei SUN2000 Series User Manual page 41

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
grid when an exception occurs, select a proper overcurrent protection device in
compliance with local power distribution regulations.
Do not connect loads between the inverter and the AC switch.
The inverter is installed with an integrated monitoring unit for the residual
current. When the inverter detects that the residual current exceeds the permitted
value, it disconnects from the power grid quickly.
● If the external AC switch has residual current protection, its rated leakage
● If multiple inverters are connected to the master leakage protection device
● The AC switch cannot be a knife switch.
COM Port Pin Definitions
● When laying out signal cables, separate them from power cables and keep
● Ensure that the protection layer of a signal cable is inside the connector, that
Figure 5-7 Signal definitions
Issue 01 (2022-06-15)
WARNING
NO TICE
tripping current must be greater than or equal to 300 mA.
through their AC switches, the rated leakage tripping current of the device
must be greater than or equal to the number of inverters x 300 mA.
NO TICE
them away from strong interference sources to avoid strong communication
interference.
excess core wires are cut off from the protection layer, that the exposed core
wires are totally inserted into the cable hole, and that the cable is connected
securely.
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5 Electrical Connections
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