NO (DISABLED): The controller will automatically initiate a retransfer sequence once
the original sources phase unbalance condition returns within nominal limits as
programmed.
YES (ENABLED): The controller will not automatically initiate a retransfer sequence
following a phase unbalance alarm condition but the alarm will latch in. To initiate
a re-transfer sequence, an operator must manually reset the phase unbalance
alarm condition by pressing the ALARM RESET button on the GHC ALARMS
page.
5.13.8. PHASE UNBALANCE DELAY (PICKUP)
Select the desired source phase unbalance time delay setting. The setting is entered in
seconds. If no delay is required, set this time delay to zero.
5.13.9. PHASE UNBALANCE DROPOUT
Set to the desired phase unbalance dropout set point as expressed in percentage of
nominal negative sequence voltage. 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.
5.13.10. PHASE UNBALANCE PICK UP
Set to the desired source phase unbalance pick-up set point as expressed in percentage
of nominal 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 unbalance condition will be triggered following expiry of the
phase unbalance time delay setting.
5.13.11. UNDER FREQUENCY DELAY (DROPOUT)
Select the desired utility under frequency time delay setting. The setting is entered in
seconds. If no delay is required, set this feature to zero.
5.13.12. UNDER FREQUENCY DROPOUT
Set to the desired source under frequency dropout set point as expressed in percentage
of nominal system frequency. The dropout set point is the value which the internal sensor
de-energizes to an abnormal state when the source’s frequency falls below the set point.
An under frequency condition will be triggered following expiry of the under frequency
time delay setting.
To Next Page
Loading...
Need help?
General
