Installation manual

Introduction
1–12 153396 Revision D
This manual is for use by qualified installers only
ON/OFF Switch
The Xantrex GT250 incorporates a maintained position ON/OFF switch located on
the left front door, under the UFCU. Under normal operating conditions, the O
N/
O
FF switch is in the ON position. Turning the switch to the OFF position will initiate
an immediate controlled shutdown of the Xantrex GT250 and open both the main
AC and DC contactors within the unit. The main AC and DC contactors cannot be
closed unless the switch is in the O
N position. The Xantrex GT250 is prevented
from being restarted until the O
N/OFF switch is turned back to the ON position.
Auxiliary ENABLE/DISABLE
The Xantrex GT250 also has provisions for installing an auxiliary ENABLE/DISABLE
switch in series with the local control. This is advantageous for coordination of the
Xantrex GT250 at specific installations where a pre-existing back-up emergency
generator is present. Circuit termination and signal type are identified in Table A-
8 on page A–6.
WARNING: Risk of electric shock, explosion and arc flash
Turning the ON/OFF switch to the OFF postion does not remove all hazardous
voltages from inside the inverter. Before attempting to service the Xantrex GT250,
follow the procedure for “Lock-out and Tag-out (De-energize/Isolation
Procedure)” on page xiii.
Figure 1-9 ON/OFF Switch