13
3-phase sensor
With a 3-phase sensor, load demand can be measured for all three phases at the same time. When used
with a generation/consumption meter that is capable of two-way communication, this makes it possible to
compensate for consumption on one phase by feeding power into the grid on the other two phases.
With this two-way communication, all power flows can be added together, so the meter indicates the total
positive or negative balance. In the example below, there is 2.5 kW of consumption and 2 kW of generation,
so the meter indicates 0.5 kW of consumption from the grid. The 2 kW of available generated power is fed into
the grid on phase 1 to compensate for the consumption drawn from phases 2 and 3. This method enables the
1-phase PowerRouter to work as a 3-phase system.
Figure 16 : How a meter with two-way communication works
The 3-phase sensor must be connected to the home wiring connected directly to the generation/consumption
meter, before any branches to consumers in the house. The PowerRouter uses the sensor to measures the
amount of energy being consumed at any moment on any phase.
The PowerRouter only works with this type of 3-phase sensor (p/n PRA3SENSE), and a 3-phase sensor can
only be connected to one PowerRouter.
Figure 17: Connecting a 3-phase sensor
Note:
For a more detailed explanation of how to connect the 3-phase sensor, please refer to the manual
included with the 3-phase sensor.
Import
kWh
kWh
Export
0.0
0.5
1 kW
1,5 kW
2 kW
Import
kWh
kWh
Export
1.5
0
1 kW
1,5 kW
4 kW
41
Green/white wire
42
Green wire
43
Orange/white wire
11 N
fuse 315 mA
to the grid
to the installation
1 L1
4 L2
7 L3
9 L3
6 L2
3 L1
fuse 315 mA
to the grid
to the installation
0 1 7 7 6 3
0 1 7 7 6 3
N
L1
L2
SeNSor
3
6
9
1
11
4
7
Fuse
315 mA
L3
L1
L2
L3
