TS 840 TRANSFER SWITCH
PM057 REV 8 10/01/25 15 Thomson Technology
Switch the utility control circuit isolation switch to the de-energized
position to remove utility control power. To isolate the generator supply,
remove the control circuit isolation plug. Note: The AC power
conductors will still remain energized. Once all the control circuits are de-
energized and isolated the "Service Disconnected" pilot light will not
illuminate due to loss of control power.
Note: To return the transfer switch back to normal operation, the utility
control circuit disconnect switch and control circuit isolation plug must be
switched on and reconnected for correct operation.
If the position of the transfer switch mechanism is not in the "neutral
position", manually operate the transfer switch mechanism by inserting
the manual operating handle into the front of the transfer mechanism and
turn the operating handle until the position indication on the mechanism
clearly shows the “neutral position”.
WARNING!
Failure to move the mechanism to the Neutral
Position may result in serious personal injury
or death due to electrical shock.
3. Close the transfer switch door securely using a suitable tool. Lock the
door in the closed position and remove the key.
WARNING!
Failure to positively lock closed and secure the
transfer switch door may result in serious
personal injury or death due to electrical
shock.
4. Attach a safety lockout padlock to the service disconnect control switch to
prevent unauthorized change in operating condition and verify transfer switch
door is locked closed.
5. To re-energize the load, remove the padlock(s) from the service
disconnect control switch, and move the switch to the Energized position.
The transfer switch will immediately return to the utility or generator supply if
within normal operating limits.
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