In case of single-pole tripping in multi-phase systems, a phase selection is
performed.
12.1.6.7
Simplified logic diagram
M13893-40 v4
The simplified logic diagram for the complete logic is shown in figure
.
IEC05000515-2-en.vsd
CRG
CR
CRL
CRL
1
tSecurit
y
t
200 ms
t
150 ms
LCG
Unblock =
Restart
Unblock =
NoRestart
Unblock =Off
CSUR
BLOCK
CSBLK
CRL
BLKCS
CSOR
CACC
CS
TRIP
t
25 ms
tCoord
tSendMin
tSendMi
n
SchemeType =
Blocking
Schemetype =
Permissive OR
Schemetype =
Permissive UR
SchemeType =
Intertrip
t
OR
AND
AND
AND
AND
AND
AND
AND
AND
AND
AND
OR
OR
AND
AND
t
OR
OR
OR
OR
OR
IEC05000515 V2 EN-US
Figure 223:
Scheme communication logic for distance or overcurrent
protection, simplified logic diagram
Section 12
1MRK 506 382-UEN A
Scheme communication
440
Line distance protection REL650 2.2 IEC
Technical manual
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