Product Manual

TP-6946 3/1654 Section 6 Operation
Figure 6-6 Service Disconnect to OFF Decal
6.4.1 Service Disconnect Procedure,
Service Disconnect to OFF
The service disconnect switch has two positions: AUTO
and SERVICE DISCONNECT. Follow the procedures in
this section carefully and observe the safety precautions
when performing a service disconnect before
maintenance or service. Watch the LED indicators on
the ATS controller to check the ATS position and source
status during the procedures.
Transfer Switch in NORMAL
Use this procedure if utility power is connected and the
transfer switch is in the Normal position.
1. Move the service disconnect control switch located
on the door of the transfer switch to the SERVICE
DISCONNECT position.
2. Check that the utility (normal) breaker is open and
the Utility Disconnected light is illuminated.
3. If the utility breaker is NOT open, manually operate
it to the NEUTRAL (MCCB) or TEST (ICCB)
position. See Section 2.7 for manual operation
instructions.
Note: The service disconnect procedure removes
power from the load, but utility power is still
present at the transfer switch normal side
lugs whenever the utility source is available.
4. The Utility Disconnected light will stay on as long as
utility power is present at the normal source lugs.
The controller display shows SERVICE
DISCONNECTED and the NOT IN AUTO LED
flashes.
5. Attach a safety lockout padlock to the service
disconnect control switch to prevent unauthorized
change in operating condition and verify transfer
switch door is locked closed. If the door is not
locked, turn and remove the door key.
6. Use a voltmeter to verify that power is
disconnected from the load before servicing
connected equipment.