enphase 400 A Consumption CTs Installation Instruction

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 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 fit most residential installations. In certain cases,
such as small commercial sites, a larger CT may be needed to fit 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.
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
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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
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flows 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 specified by
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Enphase Energy, the protection provided by the equipment may
be impaired.
DANGER: Risk of electric shock. Be aware that installation of this
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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 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-
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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.
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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.
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NOTE: Perform all electrical installations in accordance with all
national and local electrical codes.
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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 fit
the opening in the CT.
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NOTE: For indoor use only.
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NOTE: Not suitable for connecting to safety extra
low-voltage circuits (SELV) or equivalent.
(MODEL: CT-400-SPLIT-INT)
SPECIFICATIONS
SPECIFICATION
CT type
CT accuracy (error rate)
Maximum primary supported
current
Turns ratio
Dimensions (mm)
Aperture (mm)
Supported cable size
Primary voltage (range)
Frequency
Operating temperature
Humidity
Compliance
Maximum operating altitude
Pollution degree
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
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the blue "C1" terminal.
Clamp the CT on the main supply Line 1. When the Consump-
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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
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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
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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.
CT-400-SPLIT-INT
Split core
<1.5%
400 A
2500
93 × 111 × 25
50 × 50
Up to a maximum size of 300 kcmil
conductors
250 VAC maximum
50–60 Hz
-40 to 70ºC
95%
IEC 61869-1
2600 m
2