TS 870 Transfer Switch
PM062 REV 11 16/04/19
30
Thomson Power Systems
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 ATS Power Chassis & Voltage Sensing
Isolation Plugs (PL12 & PL 15) must be switched on and reconnected for
correct operation.
2. If the position of both power switching units are not in the Open position, the
power switching units must be manually operated as follows. To operate
manually, push the power switching units Open pushbutton. The unit should
then open. Repeat for the other power switching unit.
3. Close all transfer switch doors securely using a suitable tool. Lock the door in
the closed position and remove the key.
WARNING
Failure to move the mechanism to the Neutral
Position 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 reenergize 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.
5.5.
TEST MODES
The transfer switch may be tested utilizing the TSC 900 GHC display push-buttons, optional
four position test switch (If fitted) or remote power fail test switch. A simulated utility power
failure condition will be activated when the test mode is selected. The transfer switch will
operate as per a normal utility power fail condition.
The transfer switch will remain on generator supply until the test mode is terminated. It will
then immediately transfer back to the utility supply and then continue to operate the generator
set for its cooldown period then stop.
NOTE:
The transfer switch will automatically return to the utility supply (if within nominal limits)
if the generator set fails while in the test mode.
Summary of Contents for TS 870
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