Installation manual

Introduction
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This manual is for use by qualified personnel only.
Description of the Xantrex GT250 E
The Xantrex GT250 E 250 kW Grid-Tied Photovoltaic Inverter is a utility
interactive, three-phase power conversion system for grid-connected
photovoltaic arrays with a power rating of 250 kW. Designed to be easy to install
and operate, the Xantrex GT250 E automates start-up, shutdown, and fault
detection scenarios. With user-definable power tracking that matches the inverter
to the array and adjustable delay periods, users are able to customize start up
and shut down sequences. Multiple Xantrex GT250 E inverters are easily
paralleled for larger power installations.
The Xantrex GT250 E power conversion system consists of a pulse-width
modulated (PWM) inverter, switch gear for isolation and protection of the
connected AC and DC power sources. Housed in a rugged IP21 rated,
galvanized steel Enclosure, the Xantrex GT250 E incorporates sophisticated
Intellimod

(IPM) Insulated Gate Bipolar Transistors (IGBTs) as the main power
switching devices. An advanced, field-proven, Maximum Peak Power Tracker
(MPPT) integrated within the Xantrex GT250 E control firmware ensures the
optimum power throughput for harvesting energy from the photovoltaic array.
The advanced design of the Xantrex GT250 E includes an EMI output filter and
the main AC contactor located electrically on the inverter side of the isolation
transformer.
Additionally, the Xantrex GT250 E integrated controller contains self-protection
features including over and under voltage and frequency safeguards. An integral
anti-island protection scheme prevents the inverter from feeding power to the
grid in the event of a utility outage. The Xantrex GT250 E includes a local user
interface comprised of an O
N/OFF switch, keypad, and 4-line, 80 character LCD
display. A user-friendly, Graphic User Interface (GUI) provides a remote interface
for operator interrogation of Xantrex GT250 E system status, control, metering/
data logging and protective functions within the Xantrex GT250 E. The status,
control, and logging features are also supported by the data modem (included)
and can be accessed remotely.
The Xantrex GT250 E comes in a set of three Enclosures to house the Electronics
described above. The left section is the AC Interface Enclosure (-H0). The center
section is the Main Inverter Enclosure (-H1). The right section is the DC Interface
Enclosure (-H2). The three Enclosures are constructed and delivered as one
complete assembly. These components are identified in Figure 1-1 on page 1–3
and the dimensions are identified in Figure A-1 on page A–6.