enphase CT-200-Clamp User manual

INSTALLATION INSTRUCTION
Installing Enphase CT-200-Clamp
Use this instruction with the Enphase IQ Gateway Quick Install Guide to install Enphase consumption monitoring Current Transformers (CTs).
The Enphase IQ Gateway uses a pair of clamp CTs for monitoring consumption. They perform metering with an accuracy class of 1%. Rated at
Pollution Degree 3, you can use the CT inside electrical equipment in residential or in harsh, industrial conditions. Read and follow all warnings and
instructions in this instruction and in the Quick Install Guide included with your Envoy and available at enphase.com/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.
Remove any pre-installed consumption CTs
A ) Remove the line 1, and line 2 conductors circuit to which the con-
sumption CTs are connected.
B ) Remove the existing CTs.
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 white “C1” and the blue wire 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).
• To monitor consumption on Line 2:
- Connect the white wire to the white “C2” terminal and the blue
wire to the blue “C2” terminal.
- Clamp the CT on the main supply Line 2. When the consumption
CT is on Line 2 conductor, the arrow must point toward the load
(away from the grid).
•Tighten all connections to 5 in-lbs (0.6 N m).
C ) Close and secure the terminal block door of the Envoy.
D ) Turn on the PV system.
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 Envoy
the main load center before beginning wiring. If the subpanel
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 Envoy for production and consumption
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 load center feed, the Envoy, and the
solar production circuit breaker. Wire colors (typically black and
red) may not always consistently identify L1 and L2. If in doubt,
use a multimeter to check.
✓NOTE: Only run active 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.
SPECIFICATIONS
SPECIFICATION CT-200-CLAMP
CT type CLAMP CT
CT accuracy (error rate) <1%
Max primary supported current 200A
Turns ratio 2400
Pollution degree 3
Dimensions (inches) 2.75 * 2.12 * 0.61
Aperture Diameter (inches) 0.87
Primary voltage 250VAC
Frequency 50-60Hz
Operating temperature -40 to 85 degree C
Humidity 95%
Compliance UL2808 certied with service entrance
rating, ROHs

Enphase Customer Support: enphase.com/en-us/support/contact
© 2022 Enphase Energy. All rights reserved.
Enphase, the Enphase logo, Enphase Enphase
Installer App, Enphase IQ Gateway, and other
trademarks or service names are the trade-
marks of Enphase Energy, Inc.
Data subject to change. Rev01-03-03-2022
Load Center
To Grid
From PV System
Production CT The arrow must point toward the load — away from the solar array.
IQ Gateway Terminal Block
Relay contacts (if needed)
L1: black
L2: red
N: white
white
blue
white
blue
Not used
white
blue
Consumption CTs The arrows must point toward the load — away from the grid.
P1 C1 C2
1 2 3 4 NO
Ref
Common
C
Digital Input Relay
PD, B300
OVC II
L1 L2
N
CU, 75C, 14AWG MIN MEAS CAT III OVC III Production | Consumption
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.
- 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 1200A
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 400A services that are
provided by a set of two 200A conductors and paral-
lel-connected 200A 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 clamp CTs on each line conductor and then paral-
lel-connecting the output conductors at the Envoy CT
wiring terminals or in a wire connector prior to landing in
the Envoy terminals.