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Installation and Operation Guide SOLECTRIA
XGI 1500-250 Series Inverters
AC PHASE CONNECTIONS
Figure 3-14 AC Connections – Neutral and Ground (Left) and AC Phases (Right)
For aluminum connections, follow these steps to prepare the wires, one wire at a time.
a) Remove the appropriate amount of wire insulation
b) Use a wire brush to remove the oxidation layer from the aluminum conductors.
c) Immediately apply neutral dielectric grease (such as Noalox) and connect the cable to the terminal.
If the connection is not made within 30 seconds of applying the grease, repeat this process as an oxidized
layer may have formed on top of the conductor. An oxidized layer is a poor conductor which could lead to
thermal issues, production loss, or damage to the inverter.
Clockwise Phase Rotation: Ensure the inverter is installed with a clockwise phase rotation. A
counterclockwise phase rotation will prevent the inverter from running. If the inverter reports a PLL (Phase
Lock Loop) error or the frequency/voltage measurements seem incorrect, check your phase rotation. Swapping
any two AC conductors will reverse the phase rotation.
AC Breaker Specifications
The AC output of the Solectria XGI 1500 series inverters requires connection to a 3-pole AC breaker with ratings
as specified in Table 3-3.
Table 3-4 AC Breaker Specifications
XGI 1500-
XGI 1500-
XGI 1500-225-600
XGI 1500-175-480
250/250-600
200/200-480
350 A
350 A
350 A
350 A
AC Breaker Size
(3 pole, 600VAC)
(3 pole, 600VAC)
(3 pole, 480VAC)
(3 pole, 480VAC)
DOCR-071074 (Rev 7, 30 MAY 2023)
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