TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
5.9.13. SWITCH MODEL
The GHC Display will display the Switch Model type it is configured to (i.e. ATS
Mechanism type S, T or ICS). This is a “read-only” parameter and cannot be changed.
5.9.14. TRANSFER SWITCH MECHANISM OPERATION TIME
The In-sync transfer logic includes an anticipatory closing delay to ensure in-sync
transfers occur within pre-set voltage and frequency thresholds for a wide variety of
ATS mechanism types. Enter in the time, in milliseconds, the specified ATS
mechanism operation time to close a power switching device.
5.10. OPTION SETTINGS
The TSC 900 has a number of options which can be set depending on type. To program
Options, navigate to the “Settings” page. Once on the Settings Page, select the OPTIONS on
the left side menu bar, and scroll through available list of functions as available.
5.10.1. CURRENT METERING
If the ATS was purchased with the LPM (Load Power Metering Option) or CT kit option,
the current metering can be enabled by setting the value to YES.
5.10.2. GEN (SOURCE 2) COMMIT TO TRANSFER
The TSC 900 transfer switch controller contains a “GEN COMMIT TO TRANSFER”
logic selection feature. This feature is user programmable and allows 2 different
functional settings which are described below:
NO (DISABLED): The transfer switch will not commit to transfer to the
generator after the engine start delay has expired, but will return to the utility
supply if immediately restored.
YES (ENABLED): The transfer switch will commit to transfer to the generator
after the engine start delay has expired. “Selecting the “ENABLED” mode will
prevent numerous engine starting and stopping sequences if the utility supply is
continuously fluctuating beyond the pre-set limits. The feature is automatically
cancelled after expirary of the Gen Commit to Transfer timer (5 mins
adjustable) should the generator fails to start.
5.10.3. ENABLE LOAD SHED ON UNDER FREQUENCY
When the Load Shed under frequency feature is enabled, the Load Shed control logic
will utilize load frequency threshold set points to determine when a load shed condition
is activated. Refer to Section #5.14 for programming the load shed frequency
threshold set points.
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