enphase CT-100-SPLIT-ROW User manual

INSTALLATION INSTRUCTION
Installing Enphase CT-100-SPLIT-ROW
The Enphase IQ Gateway uses a set of three 100A split core Current Transformers(CTs) each for production and consumption monitoring. They perform metering
with an accuracy class of 1%. Read and follow all warnings and instructions in this instruction and in the Quick Install Guide included with your IQ Gateway and
available at https://enphase.com/contact/support.
INSTALLATION
For more information, see the reverse of
this document for tips. Refer also to the
IQ Gateway Quick Install Guide.
Preparation
A ) If not already done, de-energize
the home load panel and the PV
system.
Installing the CTs for production monitoring
A ) Refer to the diagram on the reverse of this document for wiring.
B ) Locate the arrow on the CT label and make sure that the AC mains
wire(s) are de-energized until you have secured the CT wires in the
terminal blocks.
To monitor production on Line 1:
- Connect the white wire to the “I1•” terminal and the blue wire to
the “I1” terminal.
- Clamp the CT on active Line 1 of the solar production circuit with
the arrow pointing toward the load (away from the solar array).
• To monitor production on Line 2:
- Connect the white wire to the “I2•” terminal and the blue wire to
the “I2” terminal.
- Clamp the CT on active Line 2 of the solar production circuit with
the arrow pointing towards the load (away from the solar array).
• To monitor production on Line 3:
- Connect the white wire to the “I3•” terminal and the blue wire to
the “I3” terminal.
- Clamp the CT on active Line 3 of the solar production circuit with
the arrow pointing towards the load (away from the solar array.
•Tighten all connections to 0.56 Nm.
Install the consumption CTs
A ) Refer to the diagram on the reverse of this document for wiring.
B ) Install the consumption CTs on active phases as required:
• Locate the arrow on the CT label.
• Make sure that the AC mains wire(s) are de-energized until you
have secured the CT wires in the terminal blocks.
To monitor consumption on Line 1:
- Connect the white wire to the “I1•” and the “I1” to the blue “C1”
terminal.
- Clamp the CT on the main supply Line 1. When the consumption
CT is on Line 1 conductor, the arrow must point toward the load
(away from the grid).
SAFETY
SAFETY AND ADVISORY SYMBOLS
+DANGER: This indicates a hazardous situation, which if not avoid-
ed, will result in death or serious injury.
✓NOTE: This indicates information particularly important for opti-
mal system operation. Follow instructions carefully.
SAFETY INSTRUCTIONS
+DANGER: To reduce the risk of electric shock, always open or
disconnect circuit from power-distribution system (or service) of
building before installing or servicing current transformers.
+DANGER: Risk of electrocution! Do not install CTs when current
owing in the sensed circuit. Always install CT wires in the termi-
nal blocks before energizing the sensed circuit.
+DANGER: If equipment is used in a manner not specied by
Enphase Energy, the protection provided by the equipment may
be impaired.
+DANGER: Risk of electric shock. Be aware that installation of this
equipment includes risk of electric shock. If you wire the IQ IQ
Gateway the main load center before beginning wiring. If the sub-
panel cannot be de-energized, a qualied electrician may safely
install the CTs as directed, making sure to connect the leads and
then place the CTs around each wire and latch.
+DANGER: Risk of electric shock. Risk of re. Only qualied per-
sonnel should troubleshoot, install, or replace the CTs.
✓NOTE: Because of variance in switchboard design and main power
feed, there may not always be enough space to install CTs.
✓NOTE: Do not install the CTs in a switchboard where they exceed
75% of the wiring space of any cross-sectional area within the
equipment.
✓NOTE: Perform all electrical installations in accordance with all
national and local electrical codes.
✓NOTE: Restrict installation of current transformers in an area
where they would block ventilation openings, or in area of breaker
arc venting.
✓NOTE: Not suitable for Class 2 wiring methods and not intended
for connection to Class 2 equipment.
✓NOTE: Secure current transformer and route conductors so that
they do not directly contact live terminals or bus.
✓NOTE: When wiring the IQ Gateway for production and consump-
tion metering, be sure to install the current transformers (CTs)
exactly as described for your application.
✓NOTE: When installing CTs, it is important to match CT and sense
voltage phases. Be sure to consistently identify the two AC lines
at three points: the main electrical panel feed, the IQ Gateway,
and the PV production circuit breaker. Wire colors may not always
consistently identify L1, L2 and L3. If in doubt, use a multimeter
to check.
✓NOTE: Only run line conductors through the CT. The CT can
monitor multiple active conductors. You may run more than one
wire through the CT if all wires are on the same phase and they t
the opening in the CT.
✓NOTE: For indoor use only.
SPECIFICATIONS
SPECIFICATION CT-100-SPLIT-ROW
CT type Split core
CT accuracy (error rate) <1%
Maximum primary current 100A
Turns ratio 2500
Dimensions (in mm) 40.1 x 26.4 x 26.7
Aperture 9.8 mm diameter
Maximum conductor size support 16mm2
CT lead wire length 4m
Primary voltage 250VAC
Frequency 50-60Hz
Operating temperature -40 to 85 degree C
Compliance CE, RoHS compliant
Model: CT-100-SPLIT-ROW

Enphase Customer Support: https://enphase.com/contact/support
© 2022 Enphase Energy. All rights reserved. Enphase, the Enphase logo, Enphase Installer App, Enphase IQ Gateway, and
other trademarks or service names are the trademarks of Enphase Energy, Inc. Data subject to change. Rev03-04-08-2022
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 t 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 difcult 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
IQ Gateway CT wiring terminals or in a wire connector prior to landing in
the IQ Gateway 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 mm2, 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
NL1 L2 L3
UP TO250 Vac.
100A 0.5V 45-66Hz
UP TO250 Vac. 100A 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 IQ Gateway.
D ) Turn on the PV system.