Alstom MiCOM P54 Series, Technical Manual, Page: 330 / 1024

P54x/EN OP/La4 Operation
(OP) 5-156
MiCOM P543, P544, P545 & P546
OP
System
Checks
Ena b le/ D isa b le
‘ Sy stem Ch ec k s’ S tatus
(DDB _ SYSCH E CKS _ I N ACTIV E )
S tage 1 Ch ec k Sy nc OK
(DDB _ CH E CKSY N C _1_ OK)
S tage 2 Ch ec k Sy nc OK
(DDB _ CH E CKSY N C _ 2 _ OK)
Sy stem
Sp lit
Vo ltage
M o nit o rs
Ch ec k
Sy nc
S tage 1
Ch ec k
Sy nc
S tage 2
Sy stem Sp lit A larm
(DDB _ SYST EM_ S PL IT _ A L A RM )
Co mm o n
S ettings
S tage 1
S ettings
B l o c k ing
Ena b le
(DDB _ CH E CKSY N C _1_EN AB LE D)
Ena b le
(DDB _ CH E CKSY N C _ 2 _EN AB LE D)
Ena b le
(DDB _ SYST EM_ S PL IT _EN AB LE D)
B l o c k ing
S tage 2
S ettings
Sy s Sp lit
S ettings
B l o c k ing
Vo ltage
M o nit o r
S ettings
Line Live
(DDB _ SYSCH E CKS _L I NE_L IV E )
Line Dead
(DDB _ SYSCH E CKS _L I NE_ D E AD)
Bus Live
(DDB _ SYSCH E CKS _ BUS _L IV E )
Bus Dead
(DDB _ SYSCH E CKS _ BUS _ D E AD)
Figure 100 Check sync (P543/P545)
4.3 Auto-reclose/check synchronization interface (P543/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 interaction between the auto-reclose and system
checks.