Product Manual

TP-6946 3/16 49Section 6 Operation
6.2.3 Transformer Assemblies
Service disconnect to OFF units are equipped with
revised transformer assemblies and controller firmware
version 1.10. See Figure 6-2 for illustrations of original
and revised transformer assemblies.
Orignal Transformer Assemblies
Transfer switches equipped with an original transformer
assembly GM69797-KA1 or GM69797-KA2 must use
the Service Disconnect to Emergency position only.
The transformer kit number is not printed on the
nameplate.
If the controller is replaced or the controller firmware is
upgraded on a unit that has the original transformer
assembly, it will be necessary to change the service
disconnect position on the controller back to Emergency
as described in Section 7.
Revised Transformer Assemblies
Transfer switches equipped with revised transformer kit
number GM94796-AA1 (for MCCB models) or
GM94796-AA2 (for ICCB models) are factory set to use
the Service Disconnect to OFF position. Kit number
GM94796-AA1 or GM94796-AA2 will appear in the
accessories section of the transfer switch nameplate
and the transfer switch door will have the service
disconnect label shown in Figure 6-1.
The nameplate is located on the controller cover on the
inside of the enclosure door. See Figure 1-3 in Section
1.3 of this manual for an illustration of the ATS
nameplate, if necessary.
Transfer switches equipped with revised transformer
assemblies can be converted to use the Service
Disconnect to Emergency position, if necessary. See
Section 7.
6.3 Service Disconnect to
Emergency Operation
Note: This section describes service disconnect and
reconnect procedures for transfer switches that
use the Service Disconnect to Emergency
position. Go to Section 6.4 for transfer switches
that use the Service Disconnect to OFF position.
The two-position service disconnect switch disconnects
the normal source from the load, transfers to
emergency, and inhibits further transfer.
The service disconnect switch and utility disconnected
lamp are located on the enclosure door. See Figure 6-3
for the typical service disconnect switch location.
When the switch is in the SERVICE DISCONNECT
position, the controller display shows SERVICE
DISCONNECT and the utility disconnected lamp on the
enclosure door illuminates.
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
WARNING