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8. Connection of the energy meter
Warning – The meter must always be protected by fuses or circuit breakers on the incoming side. It is recommended that the input
voltage sensing is protected by fuses rated 6A (gL–gG type) or by circuit breakers rated 6A (B/C type) installed near the meter.
To avoid risks of electrical shock, all wiring operations must be carried out with the AC disconnect switch (or the supply meter)
upstream of the meter disconnected.
Management of the storage system in order to optimise the energy self-consumption and self-sufficiency of the REACT2 system is based on the reading of
the power by the meter. On the basis of the type of electric supply the following are available:
54
REACT-MTR-1PH
for single-phase grid up to 30 A.
40
ABB B21
for single-phase grid up to 65 A.
58
ABB B23
for three-phase grid up to 65 A (it can be
used for single-phase grid if correctly installed).
58
ABB B24
for three-phase supplies with an external
current transformer (it can be used for mono-phase
supplies if correctly installed).
The energy meter will communicate with the REACT2
through a dedicated serial line (RS485 METER).
The connection of the RS485 METER line to the REACT2-UNO must be made using the
dedicated METER connector
In the picture below are described the components of the counterpart connector and the
relative torques:
Mating Torque
0.6Nm
Torque 0.6Nm
Follow the procedure to connect the RS485 cable to the counterpart (supplied) of the METER connector
1. Disassembly the counterpart connector
2. Install all components on the RS485 cable
3. Strip the cable as indicated in the picture
4. Install the wire on the head of the connector following the indication below:
Screw terminal on the counterpart connector
1
3
4
Turn the M2.5 screw with suitable screwdriver (torque 0.2Nm)
5. Install connector housing (torque 0.6Nm)
6. Install seal, pinch ring, pressing screw
7. Pressing screw should be tightened with torque 1Nm
8. Install the counterpart on the METER connector
The cable of the cable assembly must remain perpendicular to the connector and avoid an excessively sharp bend radius and
loading. The maximum bend radius of a cable is ±10°.
14
.
Male head
M2.5 screw
0.75mm max.
Torque 0.2Nm
5mm
25mm
14
by screwing the metallic ferrule (torque 0.6Nm). Give a pull test to confirm the connection is secure.
Housing
2
RS485 METER signal
-T/R
+T/R
RTN
- 10 -
BATTERY
PV
COMM.
POWER
DC SWITCH
Gasket
Pressing screw
Cable diameter
RS485 METER
Clamping ring
cable
14
:
EN
14
METER
BACKUP
GRID
Torque 1Nm
4 - 6 mm
(Continue to next page)
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