Alpha ESS SMILE-B3-PLUS Installation Manual page 18

ELECTRICAL CONNECTION
3. Dismantle the AC cable by 80mm, and strip the insulation of L, N and PE conductors by
10mm.
4. Insert the stripped part of the conductors into the cord end terminals and crimp them
by using a crimping tool.
5. Before AC wiring, tighten the pressure caps of the AC connection cover, then remove
the COM connection cover, communication cable, Grid CT line and PV CT line.
COM Connection Cover
80mm
8mm-10mm
PE Yellow/Green
N Black
L Red
PE
L1
N
L
L2=L1+3mm
30 31
6. Insert the terminals with different color conductor to the hole of the respective
polarity and tighten them one by one using the torque of 2 Nm with tool of #2 slotted
screwdriver.
7. Place the AC connection cover against the inverter and tighten it.
Insert the communication cable, Grid CT line and PV CT line into the port, and tighten
the pressure caps of COM connection cover by hand .
NOTICE
For Australia and New Zealand installation site, the neutral cable of grid side
and backup side must be connected together, otherwise backup output function
will not work.
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.
ELECTRICAL CONNECTION
COM Connection Cover
AC Connection Cover
M4
T20
2.5 N·M