enphase 400 A Consumption CTs User manual

INSTALLATION INSTRUCTION
Installing Enphase 400 A Consumption CTs
Use this instruction with the Enphase IQ Gateway Metered Quick Install Guide to install Enphase consumption monitoring current transformers
(CTs). The Enphase IQ Gateway Metered ships with two CTs for monitoring single-phase production and consumption. The three-phase sites
require three additional CTs to be ordered separately. The CTs that ship with the box is designed to t most residential installations. In certain cases,
such as small commercial sites, a larger CT may be needed to t the thicker cables installed on the site. This 400 A Consumption CT has been
designed for such applications. Read and follow all warnings and instructions in this guide and the quick install guide included with your
IQ Gateway.
INSTALLATION
For more information, see the reverse of this document for tips. Refer also
to the IQ Gateway Metered 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, Line 2, and Line 3 conductors circuit to which
the Consumption 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 Consump-
tion CT is on the 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 Consump-
tion CT is on the 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 white “C3” terminal and the blue
wire to the blue “C3” terminal.
- Clamp the CT on the main supply Line 3. When the Consump-
tion CT is on the Line 3 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 Gateway.
D ) Turn on the PV system.
SAFETY
SAFETY AND ADVISORY SYMBOLS
+DANGER: This indicates a hazardous situation, which, if not
avoided, 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 the current
transformers.
+DANGER: Risk of electrocution! Do not install CTs when current
ows 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
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 variances 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 the area of
breaker arc venting.
✓NOTE: Secure current transformer and route conductors so that
they do not directly contact live terminals or bus.
✓NOTE: When wiring the IQ Gateway Metered for production and
consumption metering, install the current transformers (CTs)
precisely 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 three AC
lines at three points: the main load center feed, the Gateway,
and the solar 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 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 in the same phase and they t
the opening in the CT.
✓NOTE: For indoor use only.
✓NOTE: Not suitable for connecting to safety extra
low-voltage circuits (SELV) or equivalent.
SPECIFICATIONS
SPECIFICATION CT-400-SPLIT-INT
CT type Split core
CT accuracy (error rate) <1.5%
Maximum primary supported
current
400 A
Turns ratio 2500
Dimensions (mm) 93 × 111 × 25
Aperture (mm) 50 × 50
Supported cable size Up to a maximum size of 300 kcmil
conductors
Primary voltage (range) 250 VAC maximum
Frequency 50–60 Hz
Operating temperature -40 to 70ºC
Humidity 95%
Compliance IEC 61869-1
Maximum operating altitude 2600 m
Pollution degree 2
(MODEL: CT-400-SPLIT-INT)

Enphase Support: enphase.com/en-us/support/contact
© 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.
Rev01-2023-08-28
Load center
To grid
To solar sub-panel
Production CT. Solid core. The arrow must point toward the load — away from the solar array.
IQ Gateway Metered t erminal block
Relay contacts (if needed)
Not used
Consumption CT. Split core. The arrows must point toward the load — away from the grid.
L2: Black
L3: Grey
N: Blue
L1: White
L1: Blue
L3: White
L3: Blue
L2: White
L2: Blue
L2: White
L2: Blue
L3: White
L3: Blue
L1: White
L1: Brown
Production
Consumption
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 IV OVC III Production | Consumption
L3
P2 P3 C3
L1: Blue
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 with
the loads on Line 1 CT.
- All of the conductors on Line 2 must be bundled with
the loads on Line 2 CT.
- All of the conductors on Line 3 must be bundled with
the loads on 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.
Revision history
REVISION DATE DESCRIPTION
140-00340-01 August 2023 Initial release
Manufacturer’s information
Falco Electronics Ltd
No. 1688 Xinyang North Road
Haicang District
Xiamen, Fujian
PRC, 361022
Tel: +(86) 592-310-2555