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Scheme communication logic (ZCOM)
Unblock = Off
ZCOM-CR
Unblock =
NoRestart
Unblock =
Restart
ZCOM-CRG
1
200 ms
t
SchemeType =
Intertrip
ZCOM-CSUR
tSendMin
ZCOM-BLOCK
ZCOM-CSBLK
CRL-cont.
Schemetype =
Permissive UR
ZCOM-CACC
Schemetype =
Permissive OR
ZCOM-CSOR
tSendMin
SchemeType =
Blocking
ZCOM-CSNBLK
Figure 42:
Scheme communication logic for distance or overcurrent protection, simplified
logic diagram
&
tSecurity
t
150 ms
>1
t
&
>1
&
&
>1
&
&
&
>1
&
>1
&
&
Chapter 4
Line distance
>1
CRL-cont.
&
&
>1
tCoord
25 ms
>1
t
t
ZCOM-CRL
ZCOM-LCG
ZCOM-CS
ZCOM-TRIP
99000192.vsd
95
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