enphase CT-400-SOLID Quick Install Manual

Q U I C K I N S T A L L G U I D E
Installing Enphase 400 A Production CTs
Use this Quick Install Guide with the IQ Gateway Commercial 2 Quick Install Guide to install Enphase production monitoring Current
Transformers (CTs). The IQ Gateway Commercial 2 uses a set of three 400 A solid core CTs for monitoring solar production current. This CT
performs metering with an accuracy class of 0.5%. Rated for 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 the Quick Install Guide included with IQ Gateway Commercial 2
and available at: enphase.com/contact/support.
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 current
transformers.
DANGER: Risk of electrocution! Do not install CTs when current
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is flowing 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 Commercial 2 at the subpanel, always de-energize the
subpanel before beginning.
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.
✓
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 (CTs) 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 (CTs) and route conductors
so that they do not directly contact live terminals or buses.
✓
NOTE: When wiring the IQ Gateway Commercial 2 for produc-
tion 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 IQ Gateway Com-
mercial 2, 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 in the same phase and they fit
the opening in the CT.
✓
NOTE: For indoor use only.
(Model: CT-400-SOLID)
SPECIFICATIONS
SPECIFICATION
Current transformer type
Current transformer accuracy
(error rate)
Maximum primary current
Turns ratio
Pollution degree
Dimensions (inches)
Aperture (inches)
Supported cable size
(maximum)
Primary voltage (maximum)
Frequency
Operating temperature
Humidity
Pollution degree
Compliance
INSTALLATION
Preparation
A ) If not already done, turn off the power to the
PV system.
Remove any pre-installed Production CTs
A ) Remove the line 1, line 2, and line 3 conductors of the solar produc-
tion circuits on which the CTs are connected.
B ) Remove the existing CTs.
Install the Production CTs
A ) Before running the CT wires through the conduit, use colored tape
to mark one of the CTs and the free end of its wires.
B ) For each CT, locate the arrow on the CT label.
C ) Refer to the diagram on the reverse of this document for wiring.
D ) Install the Production CTs on active phases as required:
Locate the arrow on the CT label.
•
To monitor production on Line 1:
•
Connect the white wire to the white "P1" terminal and the blue
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wire to the blue "P1" terminal.
Pass Line 1 of the solar production circuit through the CT with
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the arrow pointing toward the load (away from the solar array).
To monitor production on Line 2:
•
Connect the white wire to the white "P2" terminal and the blue
-
wire to the blue "P2" terminal.
Pass Line 2 of the solar production circuit through the CT with
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the arrow pointing toward the load (away from the solar array).
To monitor production on Line 3:
•
Connect the white wire to the white "P3" terminal and the blue
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wire to the blue "P3" terminal.
Pass Line 3 of the solar production circuit through the CT with
-
the arrow pointing toward the load (away from the solar array).
Tighten all connections to 5 in-lbs (0.6 N m).
•
E ) Close and secure the terminal block door of the IQ Gateway Com-
mercial 2.
F ) Turn on the PV system.
CT-400-SOLID
Solid core
<0.5%
400 A
2,000
3
2.99" diameter * 0.712" thickness
1.69" diameter
Up to 1000 KCMIL conductors
250 VAC
50 Hz - 60 Hz
-40°C to 85°C (-40°F to 185°F)
95%
3
UL2808, RoHS