Siemens 7VK512

-ETHOD OF OPERATION6+
6
#
' #

 3INGLE POLE AUTO RECLOSURE
7HEN ONLY SINGLE POLE AUTO RECLOSURE IS CARRIED
OUT 6+ ISSUES THE CONTINUOUS OUTPUT SIGNAL
2!2 P 0ROG  WHICH INDICATES THAT RECLOSURE WILL
BE CARRIED OUT ONLY IN CASE OF SINGLE
POLE TRIP 4HE
2!2 FUNCTION OF 6+ INFORMS THE FEEDER PROTEC
TION ABOUT READINESS FOR RECLOSURE BY ITS OUTPUT SIG
NAL
2!2 :ONE 2EL AND ISSUES OUTPUT SIGNAL
P 4RIP 0ERM IE SINGLE POLE TRIP PERMIS
SION THE LOGICAL INVERSION OF THREE
POLE COUPLING
4HE ACTION TIME REFER TO 3ECTION  OF THE 2!2
FUNCTION IS STARTED WITH THE FAULT DETECTION SIGNAL OF
THE FEEDER PROTECTION VIA THE BINARY INPUT
3TART
!2

4HE FEEDER PROTECTION TRIPS SINGLE
POLE IF A SINGLE
PHASE FAULT IS DETECTED IN THE STAGE VALID FOR 2!2
4HE !2
FUNCTION OF 6+ IS INFORMED VIA THE
BINARY INPUTS
4RIP , !2 OR 4RIP , !2
OR 4RIP , !2  2!2 FUNCTION IS INITIATED PRO
VIDED TRIPPING OCCURS WITHIN THE ACTION TIME REFER TO
3ECTION  7ITH FAULT CLEARANCE THE SETTABLE
DEAD TIME 2!2 4
0/, COMMENCES FOR SINGLE
POLE 2!2 THE OUTPUT SIGNAL P 4RIP 0ERM DIS
APPEARS !FTER THE DEAD TIME THE CIRCUIT BREAKER RE
CEIVES A CLOSING COMMAND THE DURATION OF WHICH IS
SETTABLE 3IMULTANEOUSLY THE SIGNAL
2!2 :ONE
2EL
DISAPPEARS AND THE SETTABLE RECLAIM TIME
4
2%#,!)- 3ECTION  IS STARTED
)F THE FAULT IS CLEARED SUCCESSFUL 2!2 THE RECLAIM
TIME 4
2%#,!)- 3ECTION  EXPIRES AND ALL
FUNCTIONS OF 6+ RESET TO THE QUIESCENT CONDI
TION 4HE NETWORK FAULT IS CLEARED THE !2 FUNCTIONS
ARE READY FOR A NEW FAULT
)F THE FAULT HAS NOT BEEN CLEARED UNSUCCESSFUL !2
THEN FEEDER PROTECTION CARRIES OUT A FINAL DISCONNEC
TION IN THE STAGE THAT IS VALID WITHOUT 2!2 !LSO EVERY
FAULT DURING THE RECLAIM TIME WILL RESULT IN FINAL DISCON
NECTION
!FTER UNSUCCESSFUL !2 FINAL DISCONNECTION THE
LOCK
OUT TIME 4",/#+ $9. 3ECTION  IS
STARTED &OR THIS TIME ANY CLOSE COMMAND FROM
6+ IS LOCKED
!FTER OCCURRENCES OF MULTI
PHASE FAULTS THE SHORT
CIRCUIT PROTECTION TRIPS FINALLY THREE POLE %VERY
THREE
POLE TRIP IS A FINAL TRIP 4HE LOCK OUT TIME
4",/#+ $9. 3ECTION  IS STARTED &OR THIS TIME
ANY CLOSE COMMAND FROM 6+ IS LOCKED
)N THIS MODE ONLY SINGLE
SHOT AUTO RECLOSURE IS
POSSIBLE
 3INGLE AND THREE POLE AUTO
RECLOSURE
4HE 2!2 FUNCTION OF 6+ INFORMS THE FEEDER PRO
TECTION ABOUT READINESS FOR RECLOSURE BY ITS OUTPUT
SIGNAL
2!2 :ONE 2EL IN ORDER TO ALLOW THE FEED
ER PROTECTION TO TRIP IN ITS 2!2 ZONE IF AVAILABLE AND
ISSUES OUTPUT SIGNAL
P 4RIP 0ERM IE SING
LE
POLE TRIP PERMISSION THE LOGICAL INVERSION OF
THREE
POLE COUPLING 4HE ACTION TIME REFER TO 3EC
TION  OF THE 2!2 FUNCTION IS STARTED WITH THE FAULT
DETECTION SIGNAL OF THE FEEDER PROTECTION VIA THE
BINARY INPUT
3TART !2 
4HE FEEDER PROTECTION TRIPS SINGLE
POLE FOR SINGLE
PHASE FAULTS AND THREE POLE FOR MULTI PHASE FAULTS
4HE !2
FUNCTION OF 6+ IS INFORMED VIA THE
BINARY INPUTS
4RIP , !2 OR 4RIP , !2
OR 4RIP , !2  2!2 FUNCTION IS INITIATED PRO
VIDED TRIPPING OCCURS WITHIN THE ACTION TIME REFER TO
3ECTION  7ITH FAULT CLEARANCE THE SETTABLE
DEAD TIME 2!2 4
0/, COMMENCES FOR SINGLE
POLE 2!2 OR THE SEPARATELY SETTABLE DEAD TIME
2!2 4
0/, FOR THREE POLE 2!2 THE OUTPUT SIGNAL
P 4RIP 0ERM DISAPPEARS !FTER THE DEAD TIME
THE CIRCUIT BREAKER RECEIVES A CLOSING COMMAND THE
DURATION OF WHICH IS SETTABLE 4HE SETTABLE RECLAIM
TIME 4
2%#,!)- 3ECTION  IS STARTED
)F THE FAULT IS CLEARED SUCCESSFUL 2!2 THE RECLAIM
TIME 4
2%#,!)- 3ECTION  EXPIRES AND ALL
FUNCTIONS OF 6+ RESET TO THE QUIESCENT CONDI
TION 4HE NETWORK FAULT IS CLEARED THE !2 FUNCTIONS
ARE READY FOR A NEW FAULT
)F THE FAULT HAS NOT BEEN CLEARED UNSUCCESSFUL !2
THEN THE FEEDER PROTECTION CARRIES OUT A FINAL DISCON
NECTION IN THE STAGE THAT IS VALID WITHOUT 2!2 !LSO
EVERY FAULT DURING THE RECLAIM TIME WILL RESULT IN FINAL
DISCONNECTION
!FTER UNSUCCESSFUL !2 FINAL DISCONNECTION THE
LOCK
OUT TIME 4",/#+ $9. 3ECTION  IS
STARTED &OR THIS TIME ANY CLOSE COMMAND FROM
6+ IS LOCKED
4HE ABOVE SEQUENCE COMES INTO EFFECT WITH SINGLE
SHOT 2!2 7ITH 6+ MULTIPLE !2 ATTEMPTS UP
TO$!2
SHOTS REFER TO 3ECTION  ARE ALSO POS
SIBLE !DDITIONALLY IT IS POSSIBLE TO SKIP THE 2!2 CYCLE
BY A SIGNAL VIA A BINARY INPUT OF THE DEVICE )N THIS
CASE ONLY $!2 IS EFFECTIVE REFER TO 3ECTION 