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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 a residual current of 300 mA (recommended). RCD of other
specifications can also be used according to local standard.
In Australia, a RCD is not required according to the local standard AS3000-2018 when either
of the following installation methods is adopted if the PV array capacitance to ground is large
(such as a tin roof):
• Use heavy duty conduits (such as metal bushing) when run PV and AC cables through
Cavity walls.
• Route the PV and AC cables through pipes (PVC or metal tubing), lay the cables and in-
stall them.
5.5.2 Connecting the AC Cable
step 1 Disconnect the AC circuit breaker and secure it against reconnection.
step 2 Take out the AC waterproof cover, unscrew the swivel nut and take out the sealing ring.
Thread the AC cable through the swivel nut, appropriate sealing and waterproof cover in
sequence.
step 3 Strip the cable jacket and the wire insulation as shown in the following figure.
5 Electrical Connection User Manual
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