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
444
MRU4
DOK-HB-MRU4-2E
