Siemens 7VK512

/PERATING INSTRUCTIONS6+
6
#
' #

 4 #" 3506
 S
#" SUPERVISION TIME WITHIN WHICH #" MUST BE READY
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
 S
 S
 39.#(+02
/.,9 "%&/2% $!2
"%&/2% 0/,% !2
2EQUEST FOR SYNCHRO
CHECK INTERNAL OR EXTERNAL IS
MADE
ONLY BEFORE RECLOSE DURING $!2
BEFORE EVERY RECLOSE AFTER THREE POLE TRIPPING
ONLY BEFORE RECLOSE DURING $!2 FROM THE ND
$!2 SHOT ON
NO REQUEST FOR SYNCHRO CHECK
"%&/2% ND $!2
.%6%2
&OR 2!2 FIRST AUTO RECLOSE CYCLE SEVERAL PRO
GRAMS ARE POSSIBLE ADDRESS 
7HEN SETTING THE ACTION TIME 2!2 4
!#4 ADDRESS
 IT MUST BE ENSURED THAT THIS TIME IS AT LEAST AS
LONG AS THE COMMAND TIME OF THE PROTECTIVE RELAY IN
CLUDING ANY POSSIBLE SIGNAL TRANSMISSION TIMES BUT
SMALLER THAN THE DELAYED BACK
UP STAGE OF THE FEED
ER PROTECTION USUALLY  S
7ITH SINGLE
POLE AUTO RECLOSURE THE DEAD TIME
2!2 4
0/, ADDRESS  MUST BE LONG ENOUGH
TO ENSURE THAT THE FAULT ARC IS EXTINGUISHED AND THE AIR
SURROUNDING THE ARC IS DE
IONIZED SO THAT AUTO RE
CLOSURE CAN BE SUCCESSFUL "ECAUSE OF THE DIS
CHARGE AND RE
CHARGE OF THE CONDUCTOR CAPACI
TANCES THIS TIME INCREASES WITH THE LENGTH OF THE LINE
#ONVENTIONAL VALUES LIE BETWEEN  S AND  S
7ITH THREE
POLE AUTO RECLOSURE ADDRESS 
THE STABILITY OF THE NETWORK IS THE MOST IMPORTANT CON
SIDERATION 3INCE THE DISCONNECTED LINE CAN NO LONG
ER PRODUCE ANY SYNCHRONIZING POWER ONLY A SHORT
DEAD TIME IS PERMITTED IN MOST CASES #ONVENTIONAL
VALUES LIE BETWEEN  S AND  S )F THE SYNCHRO
CHECK FUNCTION IS USED A LONGER TIME CAN OFTEN BE
TOLERATED
4HE POSSIBILITIES FOR THE TREATMENT OF EVOLVING FAULTS
HAVE BEEN DESCRIBED IN DETAIL IN 3ECTION  4HE
RECOGNITION OF AN EVOLVING FAULT CAN BE MADE DEPEN
DENT UPON A TRIPPING COMMAND OR UPON FAULT DETEC
TION DURING THE DEAD TIME ADDRESS  4HE REAC
TION TO EVOLVING FAULTS IS SET IN ADDRESS  BLOCK
ING IN THE CASE OF AN EVOLVING FAULT EITHER OCCURS !,
7!93 IE WITH EACH EVOLVING FAULT OR .%6%2 AT ALL OR
BLOCKING OCCURS ONLY AFTER THE FAULT IS DETECTED AFTER
THE DISCRIMINATION TIME 4$)3#2 WHICH HAS TO BE
SET IN ADDRESS  "LOCKING IN THESE CASES OCCURS
EVEN WHEN THREE
POLE AUTO RECLOSURE IS PER
MITTED
!LSO FOR THE TREATMENT OF EVOLVING FAULTS AND FOR THE
DISCRIMINATION TIME 4
$)3#2 THE STABILITY OF THE NET
WORK IS OF THE UTMOST IMPORTANCE )N ADDITION THE DY
NAMIC BURDEN OF THE GENERATORS MUST BE TAKEN INTO
ACCOUNT IN THE CASE OF FAULTS CLOSE TO A LARGE POWER
STATION &OR THE DISCRIMINATION TIME 4
$)3#2 AD
DRESS  IT IS ONLY MEANINGFUL TO CHOSE A VALUE
WHICH IS SMALLER THAN THE DEAD TIME FOR SINGLE
POLE
!2 2!2 4
0/, ADDRESS 
 2!2 02/'2
4(2%%
0/,%
3).',% 0/,%
!UTO
RECLOSE PROGRAM FOR THE FIRST !2 CYCLE 2!2
4(2%%
0/,% FOR EACH TYPE OF FAULT
THREE
POLE AUTO RECLOSURE
3).',%
0/,% SINGLE POLE !2
FOR MULTI
PHASE FAULTS NO RECLOSURE
TAKES PLACE !2 BLOCKED
3).',%
FOR SINGLE PHASE FAULTS SINGLE POLE
4(2%%
0/,E !2 FOR MULTI PHASE FAULTS THREE
POLE !2
3).',%4(2%% 0/,