enphase CT-100-SPLIT ROW User manual

INSTALLATION INSTRUCTION - EN
Installing Enphase CT-100-SPLIT ROW
The IQ Gateway uses a set of three 100 A 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 document 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. Also, refer 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 toward the load (away from the solar array.
•Tighten all connections to 0.56 N m.
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 the circuit from the power distribution system (or
service) of the building before installing or servicing current
transformers.
+DANGER: Risk of electrocution! Do not install CTs when current
is owing in the sensed circuit. Always install CT wires in the
terminal 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 the risk of electric shock. If you wire the IQ
Gateway to 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 variances in switchboard design and main pow-
er 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 the 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 in the same phase and they t
the opening in the CT.
✓NOTE: For indoor use only.
✓NOTE: Not suitable for connection to safety extra low-voltage
circuits (SELV) or equivalent.
SPECIFICATIONS
SPECIFICATION CT-100-SPLIT-ROW
CT type Split core
CT accuracy (error rate) <1%
Maximum primary current 100 A
Turns ratio 2500
Dimensions (in mm) 40.1 ×26.4 ×26.7
Aperture 9.8 mm diameter
Maximum conductor size support (2/0) AWG or 67.4 mm sq.
Primary voltage 250 VAC
Frequency 50-60 Hz
Operating temperature -40°C to 85°C
Compliance CE, RoHS compliant
Maximum operating altitude 2600 m
Maximum operating relative humidity 85%
Pollution degree 2
(Model: CT-100 -SPLIT-ROW)

Enphase customer support: https://enphase.com/contact/support
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 0 V
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 the conductors in a service panel through a single
set of Consumption CTs.
Installing parallel-connected CTs for 200 A 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 200 A services that are provided
by a set of two 100 A conductors and parallel-connected 100 A 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 before 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
UPTO 250 Vac.
100A 0.5V 45-66Hz
UPTO 250 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. IQ Gateway terminal block
8. Not used
• 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.
Revision history
REVISION DATE DESCRIPTION
140-00224-04 July 2023 Added operating environment specication
and manufacturer information
Previous releases
Manufacturer’s information:
Falco Electronics Ltd
No. 1688 Xinyang North Road
Haicang District
Xiamen, Fujian
PRC, 361022
Tel: [phone]
© 2023 Enphase Energy. All rights reserved. Enphase, the e and CC logos, IQ, and certain other
marks listed at https://enphase.com/trademark-usage-guidelines are trademarks of Enphase
Energy, Inc. in the US and other countries. Data subject to change. Rev 04/07-12-2023