Installation manual

Introduction
1–6 152936
This manual is for use by qualified personnel only.
AC and DC Disconnect Switches
Both AC and DC Interface Enclosure doors are equipped with lockout hasps for
personnel safety. The Enclosure doors should not be opened while the Xantrex
GT250 E is operating.
The switch handles and shafts provide a door interlock for both the AC and DC
interface Enclosures. The doors cannot be opened when the switch is in the
ON
position.
The AC and DC Disconnect switches are each equipped with an auxiliary
contact block which enables the switch to be used as a load break disconnect.
In the event that either Disconnect switch is opened while the Xantrex GT250 E is
processing power from the PV array, the early-break contact block will signal the
CCU2 (Converter Control Unit) to stop processing power prior to opening the
Disconnect switch.
Additionally, opening the Disconnect switch will cause the Xantrex GT250 E to
execute an immediate orderly shutdown, open both the main AC and DC
contactors, and report a E-STOP fault on the LCD of the UFCU.
When working on the system, disconnecting only the main control switch on the
AC and DC side is insufficient.
All Xantrex GT250 E Inverter Enclosure doors must be locked during normal
operation.
WARNING: Shock Hazard
Disengaging the Inverter Enclosure door interlock switch does NOT remove all
hazardous voltages from inside the inverter. Before attempting to service the
Xantrex GT250 E, follow the de-energize Lockout and Tag procedure on page ix.
Figure 1-4 AC and DC Disconnect Switches
AC Disconnect
Switch
AC Interface Enclosure
DC Disconnect
Switch
DC Interface Enclosure