Installation manual

Introduction
1–2 975-0601-01-01 Revision B
This manual is for use by qualified personnel only.
Description of the Xantrex GT500
The Xantrex GT500 is a utility interactive, three-phase power conversion system
for grid-connected photovoltaic arrays with a power rating of 500 kW. An isolation
transformer is provided with the Xantrex GT500. Designed to be easy to install
and operate, the Xantrex GT500 automates startup, shutdown, and fault
detection scenarios.
The Xantrex GT500 is designed and certified for full power operation at ambient
temperatures up to 45 °C (113 °F). Operation between 45 °C and 50 °C (113 °F
and 122 °F) will result in reduced output power, and the front panel display will
show that the inverter is in the PV Derating state.
Power Conversion System
The Xantrex GT500’s power conversion systems consist of a pulse-width
modulated (PWM) inverter bridge, isolation transformer, and switchgear for
protection of the connected AC and DC power sources. Housed in two Type 3R
rated, corrosive resistant, powder-coated steel enclosures, the Xantrex GT500
incorporates sophisticated insulated gate bipolar transistors (IGBTs) as the main
power switching devices. Advanced, maximum power point tracking (MPPT)
integrated within the Xantrex GT500 ensures the optimum power throughput for
harvesting energy from the photovoltaic array.
Advanced Design Features
A sophisticated control scheme optimizes the operation of the Xantrex GT500’s
cooling fans as needed for increased overall system efficiency.
Grid Protection The Xantrex GT500’s integrated controller contains grid-protection features
including over voltage, under voltage, and frequency disconnect functions as
well as integral anti-islanding protection that prevents the inverter from feeding
power to the grid in the event of a utility outage.
Auto-detection of
Phase Rotation
The Xantrex GT500 includes the ability to auto-sense and correct for a “mis-
phased” connection at the AC interface terminals. In the event the power
conductors from the utility are not phased correctly at the AC interface terminals,
the Xantrex GT500 will sense the discrepancy and automatically correct for a
clockwise (A–B–C) phase rotation.
WARNING
HAZARD OF ELECTRIC SHOCK
The Xantrex GT500 employs field adjustable voltage and frequency
disconnect setpoints and time delays that are factory set in compliance with
interconnect standards. They can only be changed by qualified personnel
aware of the impact of changing the setpoints and only with the agreement of
the local authority.
Failure to follow these instructions can result in death or serious injury.