SECTION 3
INSTALLATION AND INITIAL TURN-ON
PV-15208 Photovoltaic Inverter
Operation and Maintenance Manual
Copyright 2000, Xantrex Technologies Inc./Trace Technologies Corp.
DOCUMENT: 150919
3-4
To reduce the risk of fire, connect only to a cir-
cuit provided with 65 amperes maximum branch
circuit overcurrent protection in accordance with
the National Electrical Code, ANSI/NFPA 70.
CAUTION
INTERCONNECTION WIRING
The following wires for connecting the PV-15208 to ex-
ternal devices are not provided by Xantrex/Trace Tech-
nologies: (See wiring diagram on the following page.)
Phase-Sequencing
The PV-15208 is equipped with an automatic phase-
detection control algorithm. This allows the utility
interface conductors to be connected in any sequence
convenient at the time of installation. Upon system
initialization at power-up, the PV-15208 determines
the phase sequence of the utility connection and
configures the modulator drivers accordingly.
•
3-Phase 208 VAC inverter output (main contactor, see picture) to terminals of the 208 VAC delta
side of isolation transformer. If the inverter side of the isolation transformer is configured
WYE and the PV array is grounded, the neutral must be left floating. Ground loops will
exist when the inverter starts switching, which will cause the inverter to shut down due to
phase over-currents and may result in damage to the PV-15208. Also, insure that this
neutral is not bonded to the isolation transformer frame.
•
System ground to the isolation transformer chassis ground.
•
Isolation transformer grid side terminals to line circuit breaker (or the AC disconnect switch if
present).
•
PV frame ground to PV-15208 enclosure chassis ground stud.
•
PV-15208 enclosure chassis ground stud to the electrical distribution system ground.
•
PV+ to the inverter enclosure terminal block TB1-1.
•
PV- to the inverter enclosure terminal block TB1-2.
Install all wires listed above. Refer to the system schematics in Section 7 for more detailed terminal
locations.
MAIN CONTACTOR