-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
IE 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
IE 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
