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000779AG
5 - Installation
C
onnection of the energy meter
With a energy meter the system could automatically manages power
flows in order to optimize self-consumption or avoid feeding power to
the grid (except during transitory), basing on the reading of the meter.
On the basis of the type of electric supply the following are available:
• REACT-MTR-1PH
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for single-phase supplies up to 30 A.
• ABB B21
40
for single-phase supplies up to 65 A.
• ABB B23
58
for three-phase supplies up to 65 A (it can be used for
single-phase supplies if correctly installed).
• ABB B24
58
for three-phase supplies with an external current tran-
sformer (it can be used for single-phase supplies if correctly installed).
The energy meter will communicate with the inverter through the RS485
serial line
26
situated on the Accessory Board
18
.
Accessory Board (UNO-DM-COM KIT or UNO-DM-PLUS Ethernet COM KIT
18
) is requi-
red for energy meter proper working.
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.
Once the meter is installed in the plant it will be required to set the proper parameters du-
ring the wizard procedure in commissioning phase, or in the dedicated section of internal
webserver, in order to allow the proper working of energy meter and to enable the Dynamic
Feed-in control functionality (refer to relevant section of this user manual).
C
onnection of the REACT-MTR-1PH (single-phase)
The indications set out below are necessary to connect the REACT-MTR-1PH to the inver
-
ter. Always refer to the specific documentation supplied with the REACT-MTR-1PH.
The energy meter REACT-MTR-1PH
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is a DIN rail device (3 modu-
les) and must be installed where the electricity supply is single-phase.
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 REACT-MTR-1PH disconnected.
• Ensure that the AC line has been correctly disconnected upstream from
the REACT-MTR-1PH. Check that there is no voltage by using a multimeter.
• Strip 8/10mm of sheathing from the connection cables of the AC po
-
wer supply and connect the phase (L) and neutral (N) on the specific
terminal block
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set on the upper side of the meter; each individual
terminal of the terminal block takes a cable with a maximum section
from 0.5 to 4mm² (tightening torque of 0.5Nm).
• Connect the cables of the serial line (+T, -T and RTN) on the terminal
block
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on the lower part of the REACT-MTR-1PH. Each individual
terminal of the terminal block takes a cable with a section from 0.14 to
1.5mm² (tightening torque of 0.5Nm).
