TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
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transformer ratio. (e.g. When using a 600:120 transformer, enter a ratio of “5.0:1”).
The ratio is programmable in tenths to allow minor correction factors to be used for
non-standard potential transformer ratios.
7.3.12. SYSTEM FREQUENCY
Set to nominal system frequency of either 50Hz or 60Hz.
7.3.13. SYSTEM PHASES
Set to match the power distribution system used on the automatic transfer switch (i.e.
either single phase or 3 phase system).
7.3.14. LOAD SENSING PHASES
NOTE:
The following feature is provided in TSC 800 Software version 2.0 (or
higher).
Set to match the desired method of load bus voltage sensing required for the
application (i.e. either single (1) phase or 3 phase system).
7.3.15. PHASE BALANCE
NOTE:
The following feature is provided in TSC 800 Software version 2.0 (or
higher).
Set to the desired phase balance protection for the utility and generator supply on 3
phase systems. The setting is entered on a percentage basis with a range of 3-30%. If
the monitored supply voltage exceeds the programmed setpoint on any one phase, a
transfer to the alternate source will be initiated following the phase balance time delay
setting. To disable this feature set the percentage to 30%.
NOTE:
The Phase Balance feature and program setting is only enabled when 3
phase sensing is selected.
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