enphase CT-200-Clamp Installation Instructions

I N S T A L L A T I O N I N S T R U C T I O N
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.

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
+
flowing 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 specified 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 qualified 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 fire. Only qualified 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 fit
the opening in the CT.

SPECIFICATIONS

SPECIFICATION
CT type
CT accuracy (error rate)
Max primary supported current
Turns ratio
Pollution degree
Dimensions (inches)
Aperture Diameter (inches)
Primary voltage
Frequency
Operating temperature
Humidity
Compliance

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.
CT-200-CLAMP
CLAMP CT
<1%
200A
2400
3
2.75 * 2.12 * 0.61
0.87
250VAC
50-60Hz
-40 to 85 degree C
95%
UL2808 certified with service entrance
rating, ROHs