Alpha ESS SMILE-S6-HV Installation Manual page 24

ELECTRICAL CONNECTION
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.
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 installa-tion 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.
7.4.4 CT Connection
We provide a Grid-CT cable and a CT accessory for DC-coupled systems.
Step 1: Insert the registered jack of the Grid-CT cable into the Grid-CT port on the
inverter
Step 2: Connect the other end of Grid-CT cable with the CT.
Step 3: Buckle the Grid-CT on the live wire of the house.
For AC-coupled systems and Hybrid-coupled systems, another PV-CT is required . Buckle
the PV-CT on the live wire of the PV inverter connecting point and insert the registered
jack of the PV-CT cable into the PV-CT port on the SMILE-S6-HV-INV.
NOTE:
The arrow of the CT should point to the grid port of the inverter from the
grid or the PV inverter.
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SMILE-S6-HV-INV
7.4.5 Meter Connection
The system supports the following two different metering schemes in order to record the
feed-in power and consumption from grid:
DTSU666-3*230V 5A: Three/single-phase meter (without CT)
DTSU666-100/40mA: Three/single-phase meter (with 3 or 6 CT)
Meter wiring introduction
NOTICE
If the extra PV inverter are not used, the system is suitable for DC mode.
If you use the extra PV inverter, the system is suitable for AC or Hybrid mode.
1. DTSU666-3*230V 5A: Three-phase meter (without CT) connection
SMILE-S6-HV-INV
PV Inverter
LOAD
L N
PE
RJ45
6B
B
A
3A
L
LOAD
L N
L
PE
PV Inverter
Optional
Wiring at single-phase home
ELECTRICAL CONNECTION
L
Grid
CT
N
L
N L N
N
GRID
L N