Product Manual

TP-6946 3/1658 Section 6 Operation
Control Circuit Reconnect Procedure (when
normal source is NOT available)
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Note: Review the precautions and notes in Section 6.3
before proceeding. On service entrance
transfer switches, the line side lugs are active
at all times.
Do not return the generator set to service until instructed
to do so in the procedure below.
1. Open the ATS enclosure and manually transfer to
utility (IF GENERATOR WAS TURNED OFF).
2. Close the breaker between generator and
emergency side of ATS (if present).
3. Move the control circuit isolation switch to the ON
position.
4. Move the service disconnect switch to the AUTO
position.
5. Return the generator set to service:
a. Reconnect the battery cables, negative lead
last.
b. Reconnect power to the battery charger.
c. Move the generator set master switch to the
AUTO position.
6. The engine start contacts will close because
Normal is not available. Generator set will start.
7. When the generator source is available, the ATS
transfers to emergency.
8. Verify that the ATS controller display shows
emergency source available and ATS in
emergency position. The service disconnect light
on the door should be off.
6.5.2 Control Circuit Isolation and
Reconnect for Service Disconnect
to OFF Units
Note: This section describes control circuit isolation
and reconnection procedures for transfer
switches that use the Service Disconnect to OFF
position. Go to Section 6.5.1 for transfer switches
that use the Service Disconnect to Emergency
position.
Control Circuit Isolation Procedure
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Note: Review the precautions and notes in Section 6.4
before proceeding. On service entrance
transfer switches, the line side lugs are active
at all times.
1. Perform the service disconnect procedure in
Section 6.4.1.
Note: There is still power to the controller
assembly after the service disconnect
procedure is completed.
2. Open the enclosure door and move the control
circuit isolation switch to the OFF position.
3. Use a voltmeter to verify that there is no power to
the ATS controller assembly before removing the
controller.