THOMSON TSC 7320 - Transfer Fail Alarm Reset Procedure; Service Disconnect Mode Operation; Phase Sequence Protection Alarm Reset

TSC 7320 Transfer Switch Controller
PM180 REV 0 23/02/10 Thomson Power Systems
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4.5. TRANSFER FAIL ALARM RESET
Should a Transfer Fail Alarm occur, the Alarm LED will start flashing. The transfer switch is pre-
programmed as Force Transfer, so the ATS will automatically transfer to the alternate source (if
available) and will still stay locked onto the alternate source unit the Transfer Fail alarm is
manually reset by the ATS operator. The alarms can be silenced by pressing the Alarm mute
button.
To determine which transfer alarm condition has been triggered, navigate to the Alarms page
using the left and right navigation buttons. If multiple alarms have been generated, use the up
and down arrows to cycle between alarms. Once the specific alarm condition has been
determined and the necessary corrective action has been implemented, the alarm can be reset
by pressing and holding the Alarm mute button for 5 seconds.
4.6. SERVICE DISCONNECT MODE
For transfer switches equipped with the Service Entrance Mode option, the TSC 7320 is
configured to provide additional logic for the application. When the TSC 7320 controller receives
an input signal from the door mounted Service Disconnect switch to transfer to the neutral
position, the TSC 7320 control outputs will change state to cause the ATS mechanism to move
to the neutral position. The ATS operator must wait ~2 seconds to allow the ATS to move to the
neutral position before selecting the Disconnected position. When the Service Disconnect
switch is moved to the Disconnected position, all transfer logic control outputs from the TSC
7320 are disconnected and the engine start signal is disabled. When the Service Disconnect
switch is returned to the Energized position, the TSC 7320 control outputs are re-connected
and will change state to cause the ATS mechanism to transfer back to the Utility position.
NOTE
The controller will stay in Stop mode after moving the service
disconnect switch back to the Energized position. To resume normal
operation the user must press the auto mode button when done
4.7. PHASE SEQUENCE PROTECTION ALARM RESET
The TSC 7320 is programmed to generate an alarm if it detects a rotated phase sequence (not
A-B-C). The ATS will not transfer to that source until the sequence has been fixed, and the
alarm has been cleared.