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Data subject to change.
Rev03-02-10-2022
INSTALLATION TIPS
Installing multiple conductors in a single CT
If you need to install multiple conductors in a single CT,
you must ensure that the conductors terminate on the
same line conductor, so the voltage at the terminals of the
two conductors will be 0V between them.
There are some challenges to this approach:
-
It is easy to make a wiring error.
-
The conductors must fit within the CT.
-
All of the conductors on Line 1 must be bundled and
with the loads on the Line 1 CT.
-
All of the conductors on Line 2 must be bundled and
with the loads on the Line 2 CT.
-
All of the conductors on Line 3 must be bundled and
with the loads on the Line 3 CT.
-
You may need to extend some of the circuits.
It is often possible to run all of the conductors in a service
panel through a single set of consumption CTs.
Installing parallel-connected CTs for 200A services and in crowded
service panels
It may be difficult to install multiple conductors through a single CT
when some of the conductors enter from the bottom of the service
panel and others enter from the top. Also, some service panels have
200A services that are provided by a set of two 100A conductors and
parallel-connected 100A circuit breakers. In those scenarios, you can
use a set of parallel-connected consumption CTs to monitor the home’s
consumption. Do this by installing two consumption CTs, one on each
line conductor and then parallel-connecting the output conductors at the
Envoy CT wiring terminals or in a wire connector prior to landing in the
Envoy terminals.
6
5
2
8
I1●
I1
I2●
I2
I3●
I3
I1●
I1
I2●
I2
I3●
I3
1 / 5 2 / 6 3 / 7 4 / 8
NO
RefGen Com / DRM Ø
C
Production
Consumption
Digital Input
Relay
PD, B300
OVC II
CU, 2.5 mm
2
, 75C
MEAS CAT III
OVC III
L1
L2
L3
N
0 1 2 3 4 5 6 7 8
AU/NZ: DRM Port
7
1
4
N
L1
L2
L3
UP
TO 250
Vac.
100A
0.5V
45-66Hz
U
P
TO 250
Vac.
100
A
0.5V
45-66Hz
3
KEY:
1. Production CT
2. Main isolator switch
3. To Meter
4. Consumption CT
5. Output from PV system
6. Electrical panel
7. Envoy-S terminal block
8. Not used
PRELIMINARY
•
To monitor consumption on Line 2
:
-
Connect the white wire to the “I2•” terminal and the blue
wire to the “I2”terminal.
-
Clamp the CT on the main supply Line 2. When the con-
sumption CT is on Line 2 conductor, the arrow must point
toward the load (away from the grid).
•
To monitor consumption on Line 3
:
-
Connect the white wire to the “I3•” terminal and the blue
wire to the “I3” terminal.
-
Clamp the CT on the main supply Line 3. When the con-
sumption CT is on Line 3 conductor, the arrow must point
toward the load (away from the grid).
•
Tighten all connections to 0.56 N m.
C ) Close and secure the terminal block door of the Envoy.
D ) Turn on the PV system.
