User Manual 5 Electrical Connection
5.7 AC Cable Connection
5.7.1 AC Side Requirements
Only with the permission of the local grid department, the inverter can be connected
to the grid.
Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with
requirements, for which, refer to "Technical Data". Otherwise, contact the electric power com
pany for help.
AC Circuit Breaker
An independent circuit breaker or fuse should be installed on the output side of the inverter to
ensure safe disconnection from the grid.
Inverter Model
Recommended Rated Volt
age
Recommended Rated Cur
rent
SG110CX 400V 200A
SG110CX-20 400V 200A
SG110CX-NI 400V 200A
WARNING
AC circuit breakers should be installed on the output side of the inverter and the grid
side to ensure safe disconnection from the grid.
• Determine whether an AC circuit breaker with greater overcurrent capacity is re
quired based on actual conditions.
• Do not connect any local load between the inverter and the AC circuit breaker.
• Multiple inverters cannot share one AC circuit breaker.
Residual Current Monitoring Device
With an integrated universal current-sensitive residual current monitoring unit included, the
inverter will disconnect immediately from the mains power once a fault current with a value
exceeding the limit is detected.
However if an external residual current device (RCD) (type A is recommended) is mandatory,
the switch must be triggered at the residual current. RCD of other specifications can also be
used according to local standard. The recommended residual current is as follows.
Inverter Recommended Residual Current
SG110CX 1100 mA
41
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