Product Manual

TP-6946 3/16 57Section 6 Operation
6.5.1 Control Circuit Isolation and
Reconnection f or Service
Disconnect to Emergency Units
Note: This section describes control circuit isolation
and reconnection procedures for transfer
switches that use the Service Disconnect to
Emergency position. Go to Section 6.5.2 for
transfer switches that use the Service Disconnect
to OFF 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 6.3
before proceeding. On service entrance
transfer switches, the line side lugs are active
at all times.
1. Perform the service disconnect procedure in
Section 6.3.
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.
Control Circuit Reconnect Procedure (with normal
source 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. Close the breaker between generator and
emergency side of ATS (if present).
2. Move the control circuit isolation switch to the ON
position.
3. Move the service disconnect switch to the auto
position.
4. The ATS will transfer to normal source and open
engine start contacts.
5. 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.
6. Return the generator set to service:
a. Reconnect the battery cables, negative lead
last.
b. Reconnect power to the battery charger.
c. Put the generator set back into auto mode by
moving the generator set master switch to the
AUTO position or pressing the AUTO button on
the generator set controller.