Alstom MiCOM P545 - 4.3 Auto-reclose;check synchronization interface (P543;P545)

P54x/EN OP/La4 Operation
(OP) 5-156 MiCOM P543, P544, P545 & P546
OP
System
Checks
Enable/Disable
System Checks Status
(DDB_SYSCHECKS_INACTIVE)
Stage 1 Check Sync OK
(DDB_CHECKSYNC_1_OK)
Stage 2 Check Sync OK
(DDB_CHECKSYNC_2_OK)
System
Split
Voltage
Monitors
Check
Sync
Stage 1
Check
Sync
Stage 2
System Split Alarm
(DDB_SYSTEM_SPLIT_ALARM)
Common
Settings
Stage 1
Settings
Blocking
Enable
(DDB_CHECKSYNC_1_ENABLED)
Enable
(DDB_CHECKSYNC_2_ENABLED)
Enable
(DDB_SYSTEM_SPLIT_ENABLED)
Blocking
Stage 2
Settings
Sys Split
Settings
Blocking
Voltage
Monitor
Settings
Line Live (DDB_SYSCHECKS_LINE_LIVE)
Line Dead (DDB_SYSCHECKS_LINE_DEAD)
Bus Live (DDB_SYSCHECKS_BUS_LIVE)
Bus Dead (DDB_SYSCHECKS_BUS_DEAD)
Figure 100 Check sync (P543/P545)
4.3 Auto-reclose/check synchronization interface (P5
43/P545)
Output signals from the internal system check function and signals from an external system
check device are combined and made available as two internal inputs to the auto-reclose
function. One internal input permits auto-reclose based on system check conditions being
met. The other internal input permits immediate auto-reclose based on check synchronism
conditions being met, if this feature is enabled (CS AR Immediate).
Figure 101 shows the logic diagram for the intera
ction between the auto-reclose and system
checks.