TS 880 TRANSFER SWITCH
PM064 REV8 10/01/25 20 Thomson Technology
b) The pilot light may be burnt out. The bulb should be immediately
replaced with a suitably rated bulb.
Failure of one or more of the sensing/logic contacts. A qualified service
technician is required to trouble shoot this specific condition. 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 control circuit
isolation plug must be re-connected first and then the utility control circuit
disconnect switch can be switched back to the On position.
3. If the position of the 100A-1200A rated transfer switch mechanism is not in the
"neutral position", manually operate the transfer switch mechanism depending on
mechanism type as follows:
Note: Refer to product drawings in sections 12, 13 & 14 for identification of
Transfer Switch Mechanism style supplied with the Transfer Switch.
a. T-Style Mechanism: Pull the manual release plunger on
the mechanism, releasing the motor drive rod from motor
drive arm and move the knob and yoke to the marked
“neutral position”.
b. S-Style Mechanism: Insert the 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. If the position of both power switching units (i.e. 800A-4000A insulated case
power switching unit type transfer switch), are not in the "OPEN” position" the
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