Alpha ESS SMILE-G3-S5 Manual page 40

NOTICE
For Australia and New Zealand installation site, the neutral cable of the grid side and
backup side must be connected together at the neutral bar, otherwise the backup output
function will not work. Please refer to Appendix 3 for more details.
2. Plug the Backup connector into the socket for the Backup connection
3 Plug the Backup connector into the socket for the Backup connection and screw tight,
when doing so, align the Backup connector so that the key on the inverter Backup
socket is inserted into the keyway on the AC connector bush.
7.4.3 Residual Current Protection
The inverter is equipped with an all-pole sensitive residual current monitoring unit
(RCMU) with an integrated differential current sensor which fulfills the requirement of
DIN VDE0100-712(IEC60364-7-712:2002).
Therefore, an external residual current device (RCD) is not required. If an external RCD
needs to be installed because of local regulations, a RCD type A or type B can be installed
as an additional safety measure.
The all-pole sensitive residual current monitoring unit (RCMU) detects alternating and
direct differential currents. The integrated differential current sensor detects the
current difference between the neutral conductor and the line conductor. If the
current difference increases suddenly, the inverter disconnects from the grid. The function
of the all-pole sensitive residual current monitoring unit (RCMU) has been tested accord-
ing to IEC62109-2.
Notice of installing an external residual current device (RCD) for installation of
Australia and New Zealand
Where an external residual current device (RCD) is required in a TT or TN-S sys-tem,
please install a residual current device which trips at a residual current of 30mA.