4.10. MANUAL UTILITY RETRANSFER CONTROL
If the TSC 900 is pre-programmed to provide a Manual return to the utility supply following a
utility power failure, an operator can decide when to initiate the re-transfer sequence by pressing
the “MANUAL RETURN” button when displayed on the GHC Home page as shown below.
NOTE:
The manual re-transfer sequence will only be initiated if the
button is pressed and the utility supply (source 1) is at nominal
voltage and frequency levels.
4.11. SERVICE DISCONNECT MODE
For transfer switches equipped with the Service Entrance Mode option, the TSC 900 is
configured to provide additional logic for the application. When the TSC 900 controller receives
an input signal from the door mounted Service Disconnect switch to transfer to the neutral
position, the TSC 900 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
900 are disconnected and the engine start signal is disabled. When the Service Disconnect
switch is returned to the “Energized position, the TSC 900 control outputs are re-connected and
will change state to cause the ATS mechanism to transfer back to the Utility position.
NOTE:
For Transfer Switches equipped with the Remote Load Dump
Control (RLDC) feature, Digital input DI03 will be mapped to
Service Disconnect Mode Initiated which is utilized to move the
ATS to the neutral position when RLDC is activated.
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