Installation manual

Physical Characteristics
975-0601-01-01 Revision B 1–9
This manual is for use by qualified personnel only.
AC Interface
The AC interface (Figure 1-2 on page 1–5) is located on the left side of the
transformer assembly and serves as the connection for the utility. This section
houses the AC output terminals (TB1–A, TB1–B, and TB1–C), AC circuit breaker,
control power transformer, optional line filter, optional circuit breakers, and
AC sensing circuitry.
Each TB1 terminal provides six M10 clearance holes with space for three cables
(see Table A-6 on page A–6 for torque requirements).
AC Auxiliary Control Power
The AC auxiliary control power circuit provides power for control, communication,
and heater circuits, and it can be sourced from inside of the inverter or via an
external source. The factory default configuration sources the control power from
within the inverter. If an external source is preferred, a suitable external
disconnect device and overcurrent device must be provided to remove/
shutdown auxiliary control power. To supply the auxiliary power from an external
source, see the instructions in “Connecting AC Auxiliary Power (Optional)” on
page 3–24.
Remote Monitoring and Control
You can monitor the Xantrex GT500 remotely through the included Xantrex
RS485/Modbus Communications Kit. It enables users to monitor and control the
Xantrex GT500 from a dedicated, plant-wide monitoring system.
Power Electronics
The Xantrex GT500’s power electronics section is located on the left side of the
inverter assembly (see Figure 1-5 on page 1–8). This section contains the control
card and the power electronics bridge. It also includes the Hall-effect current
transducers. See Figure 1-5 on page 1–8.
Control Card
The control card is a digital signal processor (DSP) based control board that
performs numerous control and diagnostic functions associated with the Xantrex
GT500’s operation. Its most significant tasks are control of Xantrex GT500’s
electromechanical components and power electronics converters,
communication with the universal front panel control unit, and system sensors.
The control card also contains the necessary DC power supplies to support its
operation.
Power Electronics Bridge
The power electronic converter bridge consists of switching transistors (IGBTs),
transistor gate drive electronics, laminated DC bus structure, DC capacitors, and
a copper extrusion heat sink with cooling fans. The fans are located behind the
bridge assembly and force air onto the heat sink.