Extend Ct Leads, If Needed - enphase Envoy-S Installation And Operation Manual

Install the CT(s) for Production Metering
Install one split-core CT for each monitored phase to provide production metering. For single-phase,
connect only L1. For three-phase, connect L1, L2 and L3.
DANGER! Risk of electrocution! CTs must be installed with no current flowing in the
sensed circuit. Always install CT wires in the terminal blocks before energising the
sensed circuit.
DANGER! Risk of electric shock. Be aware that installation of this equipment includes
risk of electric shock. If you wire the IQ Gateway at the sub-board, always de-energise the
sub-board before beginning wiring.
a. Locate the arrow on the CT label.
b. Take care to identify L1, L2 and L3 at the main feed to aid in corresponding L1 - L3 at the IQ
Gateway voltage terminals (and I1 - I3 for the production CTs).
a. Connect the white wire from Line 1 to "I1•" and the blue wire to "I1".
b. Connect the white wire from Line 2 to "I2•" and the blue wire to "I2".
c. Connect the white wire from Line 3 to "I3•" and the blue wire to "I3".
d. Open and clamp each CT on the active lines (Line 1, Line 2, and Line 3, if used) of the
solar production circuit with the arrows pointing toward the load (away from the solar
array).
e. Tighten all connections to 0.56 Nm.
Install the CT for Consumption Metering (optional)
Install one split-core CT for each monitored phase to provide consumption metering. For single-phase,
connect only L1. For three-phase, connect L1, L2 and L3.
DANGER! Risk of electric shock. Always de-energise circuits before wiring power and CTs.
DANGER! Risk of electric shock. Installation of this equipment includes risk of electric
shock. If you wire the IQ Gateway at the sub-board, always de-energise the sub-board
before beginning wiring. If it cannot be de-energised, a qualified electrician may safely
install the CT as directed, making sure to connect the leads and then place the CT
around the wire and latch.
WARNING! Do not install the CT in a panel where they exceed 75% of the wiring space
of any cross-sectional area within the panel or refer to local standards for guidance.
a. Make sure that the AC mains wire(s) are de-energised until you have secured the CT wires
in the terminal blocks.
b. Take care to identify L1, L2 and L3.
c. Connect the white wire from Line 1 to "I1•" and the blue wire to "I1".
d. Connect the white wire from Line 2 to "I2•" and the blue wire to "I2".
e. Connect the white wire from Line 3 to "I3•" and the blue wire to "I3".
f. Open and clamp the CT on the main supply lines (Line 1, Line 2, and Line 3, if used).
When the consumption CT is on the line (active) conductor, the arrow should point toward
the load (away from the grid).
g. Tighten all connections to 0.56 Nm.
NOTE: Only run active conductors through the CT. The CT can monitor multiple active
conductors.

Extend CT Leads, If Needed

If needed, an electrician may extend the CT leads using the following guidance:
15
IQ Gateway Metered Installation and Operation
© 2022 Enphase Energy Inc. 15 Nov, 2022