Install Cts For Metering (Model Env-S-Wm-230 Or Env-S-Am1-230-60); Install The Ct For Production Metering - enphase ENV-S-WM-230 Installation And Operation Manual

3. Install CTs for Metering (Model ENV-S-WM-230 or ENV-S-AM1-230-60)

The IQ Gateway-M (ENV-S-WM-230 or ENV-S-AM1-230-60) uses terminal blocks for metering
connections. Install one CT for production metering and one CT for consumption metering as described
in this section. You must use a protected route in conduit for the CT wires to the IQ Gateway. If you need
to extend the leads (up to 213 meters), see "Extend Consumption CT Leads, If Needed" on page 16.
NOTES:

Install the CT for Production Metering

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. Use only the CT that came with the IQ Gateway. It is marked with the same serial number as
the IQ Gateway.
b. Locate the arrow on the CT label.
c. Clamp the CT on Line (active) of the solar production circuit with the arrow pointing towards the
load.
d. Connect the white wire to the "IA•" terminal.
e. Connect the blue wire to the "IA" terminal.
f. Tighten the terminal block screws to 0.56 Nm.
13
When wiring the IQ Gateway for production and consumption metering, be
sure to install the current transformers (CTs) exactly as described for your
application.
When using CTs, do not energise the IQ Gateway or the microinverters before the CT
installation is complete.
Do not install the CTs 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.
You can run more than one wire through the CT if all wires are on the same phase
and they fit the opening in the CT.
© 2022 Enphase Energy Inc. All rights reserved.
IQ Gateway-M Installation and
Operation
141-00031 Rev 02