User Manual

A)
Make sure that the main load center wires are de-energized until you
have secured the CT wires in the terminal blocks.
B)
Before running the CT wires through the conduit, use colored tape to
mark one of the CTs and the free end of its wires.
C)
For the marked CT, connect the white wire to the upper “C1” terminal
and the blue wire to the lower “C1” terminal.
D)
For the unmarked CT, connect the white wire to the upper “C2” terminal
and the blue wire to the lower “C2” terminal.
E)
Tighten all connections to 5 in-lbs.
F)
Clamp the marked CT on the load center feed wire Line 1 (matching the
Envoy’s “L1” voltage terminal) with the CT arrow pointing toward the
load (away from the grid).
G)
Clamp the unmarked CT on the load center feed wire Line 2 (matching
the Envoy’s “L2” voltage terminal) with the CT arrow pointing toward
the load (away from the grid).
Install CTs for Consumption Metering (optional)
The IQ Envoy inside the IQ Combiner is pre-wired at the terminal blocks for power and production metering connections. One solid-core current transformer (CT) is
provided for production metering. You can install two optional split-core CTs to provide consumption metering. To do this, you must create a protected route using
conduit for the CT wires from the main load center to the IQ Envoy. If you need to extend the wires, refer to the Enphase IQ Envoy Installation and Operation Manual
at: enphase.com/support.
Notes: It is important to match CT and sense voltage phases. To properly
measure power and energy, CT inputs must align with the respective
voltage inputs. Be sure to consistently identify and match the two AC
lines at two points: the main load center feed and the Envoy. Wire colors
(typically black and red) may not always consistently identify Lines 1 and
2. If in doubt, use a multimeter to check.
7
Note: Because of variance in load center design and main power feed, there may not always be enough space to install consumption metering CTs.
DANGER! Risk of electrocution! Do not install CTs when cur-
rent is owing in the sensed circuit. Always install CT wires
in the terminal blocks before energizing the sensed circuit.
Load Center
To Grid
From IQ Combiner
IQ Envoy Terminal Block
Relay contacts
(if needed)
UP TO 250 Vac.
100A 0.5V
45-66Hz
white
blue
Not used
white
blue
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 III
OVC III
Production | Consumption
Consumption CTs
The arrows must point
toward the load — away
from the grid.
DANGER!
Risk of electric shock. Always de-energize the load center
before beginning wiring.