Technicolor - Thomson TS 870 - Manual (Page 14)

TS 870 TRANSFER SWITCH
PM062 REV 5 08/05/05 10 Thomson Technology
the load to the generator supply. The utility source will be locked out and the load will
remain on the generator supply until the TSC 80 alarm signal is manually reset.
Refer to the TSC 80 Instruction Manual for further details on Transfer Fail operation.
Should the generator power switching device trip open due to an over current
condition, TSC 80 transfer controller will initiate transfer of the load to the utility
supply. The generator source will be locked out and the load will remain on the utility
supply until the TSC 80 alarm signal is manually reset.
5.2.3. SERVICE DISCONNECT PROCEDURE
To perform a service disconnect (i.e. to disconnect the utility and generator supplies),
the following procedure is required:
1. Move the "Service Disconnect" control switch located on the door of the
transfer switch to the "Disconnected" position.
2. Verify that the "Service Disconnected" pilot light is illuminated. If the Light
is illuminated, the service has been successfully disconnected and it is safe to
perform any maintenance procedures as required. In this condition, the
transfer switch is in the neutral position, with both utility and generator transfer
power switching devices open. The transfer switch will remain in this
condition, regardless of condition of the utility and generator supplies (i.e. if
the utility power fails, the generator will not receive a start signal, nor will the
transfer switch move to the generator position). NOTE: If the Service
Disconnect Light is not illuminated, additional procedures are required (refer
to the following procedure #5.2.4).
3. Attach 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 door key.
WARNING!
Close and lock the transfer switch enclosure door
before connecting power sources.
4. To reenergize the load, remove the padlock(s) from the service disconnect
control switch, and move the switch to the energized position. The transfer