Alpha ESS SMILE-S6 Series Installation Manual page 41

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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 will disconnect from the grid. The
function of the all-pole sensitive residual current monitoring unit (RCMU) has been
tested according 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, install a residual current device which trips at a residual current of 30 mA.
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Alpha ESS Co., Ltd.
Your Smart Energy
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