5.13.20. VOLTAGE ROTATION 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.
5.13.21. VOLTAGE ROTATION REVERSAL DROP OUT
Set to the desired phase reversal dropout set point as expressed in percentage of
nominal system voltage (i.e. sys.volt). The dropout 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.
5.13.22. VOLTAGE ROTATION REVERSAL PICK UP
Set to the desired source phase reversal pick-up set point as expressed in percentage
of nominal system voltage (i.e. sys.volt). 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.
5.14. LOAD VOLTAGE SET POINTS
The TSC 900 controller provides 3-phase voltage monitoring of 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:
5.14.1. LOAD VOLTAGE BLACKOUT DELAY (DROPOUT)
Select the desired source load voltage blackout time delay setting. The setting is entered
in seconds. If no delay is required, set this time delay to zero.
5.14.2. LOAD VOLTAGE BLACKOUT DROPOUT
This set point is utilized for neutral delay bypass and transfer fail logic. Set to the desired
load voltage blackout dropout set point as expressed in percentage of nominal system
voltage. The dropout set point is the value which the internal sensor de-energizes to an
abnormal state when any one phase of the load voltage falls below the set point. A
blackout voltage condition will be triggered following expiry of the load voltage time delay
setting.
5.14.3. LOAD VOLTAGE BLACKOUT PICKUP
This set point is utilized for neutral delay bypass and transfer fail logic. Set to the desired
load 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 load voltage rises above the set point.
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