Woodward HighPROtec MCDLV4, Manual, Page: 892 / 1275

Protective Elements
Synchrocheck Module Input States
Name Description Assignment via
ExBlo1-I Module input state: External blocking1 [Protection Para
/Global Prot Para
/Intercon-Prot
/Sync]
ExBlo2-I Module input state: External blocking2 [Protection Para
/Global Prot Para
/Intercon-Prot
/Sync]
Bypass-I State of the module input: Bypass [Protection Para
/Global Prot Para
/Intercon-Prot
/Sync]
CBCloseInitiate-I State of the module input: Breaker Close Initiate
with synchronism check from any control sources
(e.g. HMI / SCADA). If the state of the assigned
signal becomes true, a Breaker Close will be
initiated (Trigger Source).
[Protection Para
/Global Prot Para
/Intercon-Prot
/Sync]
Signals of the Synchrocheck Module (Output States)
Signal Description
active Signal: active
ExBlo Signal: External Blocking
LiveBus Signal: Live-Bus flag: 1=Live-Bus, 0=Voltage is below the LiveBus threshold
LiveLine Signal: Live Line flag: 1=Live-Line, 0=Voltage is below the LiveLine
threshold
SynchronRunTiming Signal: SynchronRunTiming
SynchronFailed Signal: This signal indicates a failed synchronization. It is set for 5s when
the circuit breaker is still open after the Synchron-Run-timer has timed out.
SyncOverridden Signal:Synchronism Check is overridden because one of the Synchronism
overriding conditions (DB/DL or ExtBypass) is met.
VDiffTooHigh Signal: Voltage difference between bus and line too high.
SlipTooHigh Signal: Frequency difference (slip frequency) between bus and line voltages
too high.
AngleDiffTooHigh Signal: Phase Angle difference between bus and line voltages too high.
Sys-in-Sync Signal: Bus and line voltages are in synchronism according to the system
synchronism criteria.
Ready to Close Signal: Ready to Close
892 MCDLV4 DOK-HB-MCDLV4-2E