TSC 80e TRANSFER SWITCH CONTROLLER
PM091 Rev 0 09/01/21 Thomson Technology
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4.6.6.4.SPAN CALIBRATION-UTILITY
4.6.6.4.1.For Span calibration, connect an external calibrated AC
voltmeter of adequate voltage range and accuracy to the TSC
80e controller utility sensing terminals (phase to neutral)
associated with the voltage phases to be calibrated
4.6.6.4.2.Energize the utility supply voltage to the controller at nominal
level. The generator supply may be de-energized.
4.6.6.4.3.To calibrate the Utility Span values, repeat procedure 5.4.6.3.2
to 5.4.6.3.6 except selecting the Utility sub-menus.
4.6.7. UTILITY VOLTAGE SETPOINTS
The TSC 80e controller provides 3-phase under voltage sensing on the utility supply.
Each sensor is individually programmable for pickup and dropout voltage setpoints (i.e.
adjustable hysteresis). To program the voltage sensing features, refer to the following
descriptions:
4.6.7.1.Utility Under Voltage Drop Out
Set to the desired utility under voltage setpoint at which the internal voltage
sensor drops out (i.e. the sensor de-energizes to an abnormal state when any
one of the utility phase voltages is below the setpoint). The setting is entered
based on a phase-to-phase voltage percentage within a range of 70% to 95%
of nominal system voltage. NOTE: The difference between the pickup and
dropout setting is considered the dead band or hysteresis value.
4.6.7.2.Utility Under Voltage Pick Up
Set to the desired utility under voltage setpoint at which the internal voltage
sensor picks up (i.e. the sensor energizes to a normal state when all phases of
the utility phase voltages are above the setpoint). The setting is entered based
on a phase-to-phase voltage percentage within a range of 75% to 100% of
nominal system voltage. NOTE: The difference between the pickup and
dropout setting is considered the dead band or hysteresis value.
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