TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
5.12.19. SOURCE VOLTAGE BLACKOUT PICKUP
This set point is utilized for neutral delay bypass and transfer fail logic. Set to the
desired source voltage blackout pick-up set point as expressed in percentage of
nominal system voltage. The pick-up set point is the value which the internal sensor
energizes to a normal state when all phases of the source voltage rises above the set
point.
5.12.20. PHASE REVERSAL DELAY (PICKUP)
Select the desired source phase reversal time delay setting. The setting is entered in
seconds. If no delay is required, set this time delay to zero.
5.12.21. PHASE REVERSAL DROP OUT
Set to the desired phase reversal drop out set point as expressed in percentage of
nominal system negative sequence voltage. The drop-out set point is the value which
the internal sensor de-energizes to a normal state when all phases of the source falls a
below the set point which is indicative of a complete phase reversal condition.
5.12.22. PHASE REVERSAL PICK UP
Set to the desired source phase reversal pick-up set point as expressed in percentage
of nominal system negative sequence voltage. The pick-up set point is the value which
the internal sensor energizes to an abnormal state when any one phase of the supply
rises above the set point. A phase reversal condition will be triggered following expiry
of the phase unbalance time delay setting.
5.12.23. GEN MUST START DELAY
The TSC 900 controller provides an alarm feature that detects if a generator set fails to
start following an engine start sequence. Generator voltage and frequency set points
are utilized to determine if the engine has successfully started or not. If the engine fails
to start within the allotted time settings of the Must Start delay timer, an alarm will be
posted on the GHC display Alarm page. Select desired maximum generator set start
time delay period in seconds.
5.13. LOAD VOLTAGE SET POINTS
The TSC 900 controller provides 3-phase voltage on the load. Load voltage set points are
utilized to determine if the load is in a de-energized state for purposes of Transfer Failure
alarming or Neutral Delay bypass operation. Each sensor is individually programmable for
pickup and dropout set points (i.e. adjustable hysteresis) in addition to transient time delay
settings. To program the sensing features, refer to the following descriptions:
To Next Page
Loading...