Product Manual

TP-6946 3/16 55Section 6 Operation
Transfer Switch in EMERGENCY
Use this procedure if the transfer switch is in the
Emergency position.
1. Move the service disconnect control switch located
on the door of the transfer switch to the SERVICE
DISCONNECT position.
2. The engine start signal is maintained briefly to
allow the emergency breaker to open. The engine
start signal is then removed.
3. Wait for the generator set to shut down. The
generator set may continue to run for several
minutes to cool the engine.
4. The Utility Disconnected light turns on if there is
utility power to the normal side transfer switch lugs.
5. Check that the emergency breaker is open. If the
emergency 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.
6. If there is no power to the normal (utility) side lugs
on the transfer switch, there is no power to the
controller or to the Utility Disconnected light.
D The Utility Disconnected light will not turn on.
D The controller display goes dark and the
controller LEDs turn off.
D If an External Battery Supply Module (EBSM)
(also known as Battery Option Board, BOB) is
installed, the generator set battery will continue
to supply DC power to the controller. The
controller display shows SERVICE
DISCONNECTED and the NOT IN AUTO LED
flashes.
7. Attach a safety lockout padlock to the service
disconnect control switch to prevent unauthorized
operation of the switch, and verify that the transfer
switch door is closed and locked. If the door is not
locked, turn and remove the door key.
8. Use a voltmeter to verify that power is
disconnected from the load before servicing
connected equipment.
6.4.2 Service Reconnect Procedure,
Service Disconnect to OFF
Hazardous voltage.
Will cause severe injury or death.
Close and lock the transfer switch
enclosure door before connecting
power sources.
DANGER
Service reconnect procedure with Normal source
available
1. Remove the padlock from the service disconnect
control switch and move the service disconnect
switch to the AUTO position.
2. Reset faults on the controller, if necessary.
3. The ATS will transfer to normal source.
4. Verify that the ATS controller display shows normal
source available and ATS in normal position. The
Utility Disconnected light on the door should be off.
Service reconnect procedure when Normal source
is NOT available
1. Remove the padlock from the service disconnect
control switch and move the service disconnect
switch to the AUTO position.
The ATS sends a start signal to the generator.
2. Reset faults on the controller, if necessary.
3. Start the generator. When the generator source is
available, the ATS transfers to emergency.
4. Verify that the ATS controller display shows
emergency source available and ATS in
emergency position. The Utility Disconnected light
on the door should be off.