Siemens 7VK512

)NTRODUCTION6+
6

#
' #
 )NTRODUCTION
 !PPLICATION
4HE NUMERICAL AUTO RECLOSURE RELAY 6+ IS AN
UNIVERSALLY APPLICABLE DEVICE FOR AUTOMATIC RECLOS
URE AS WELL AS CHECKING OF THE CLOSING CONDITIONS OF
CIRCUIT BREAKERS BEFORE AUTOMATIC ANDOR MANUAL
SWITCHING IN ELECTRICAL POWER NETWORKS OF ALL VOLTAGE
RANGES
3INGLE
POLE THREE POLE OR SINGLE AND THREE
POLE RAPID AUTO RECLOSURE IS POSSIBLE FOR OVERHEAD
LINES AS WELL AS MULTIPLE AUTO
RECLOSE SEQUENCES
4HE DEAD TIMES DURING WHICH THE LINE IS INTERRUPTED
CAN BE INDIVIDUALLY SET FOR SINGLE
POLE AUTO RECLO
SURE THREE
POLE AUTO RECLOSURE 2!2  RAPID AU
TO
RECLOSURE AND FOR CONSECUTIVE AUTO RECLOSE
CYCLES $!2  DELAYED AUTO
RECLOSURE
4HE OPTIONAL SYNCHRONISM AND VOLTAGE CHECK FUNC
TION OF 6+ CAN CHECK THE CONDITIONS FOR RECLOS
ING BEFORE THE RELAY ISSUES THE CLOSE COMMAND 4HIS
FUNCTION CHECKS SYNCHRONISM OF THE BUS
BAR AND
LINE VOLTAGE !LTERNATIVELY IT CAN BE USED TO CHECK
THAT THE LINE IS DEAD BEFORE IT IS ENERGIZED OR THAT THE
BUS
BAR IS DEAD OR BOTH 7HEN DESIRED ASYNCHRO
NOUS SWITCHING IS POSSIBLE TOO IN THIS CASE THE DE
VICE CALCULATES THE INSTANT OF THE CLOSE COMMAND
SUCH THAT BOTH VOLTAGES HAVE EQUAL PHASE AT THE MO
MENT WHEN THE BREAKER POLES TOUCH
4HE CIRCUIT BREAKER MUST BE SUITABLE FOR AUTO
RECLO
SURE 7HEN SINGLE
POLE AUTO RECLOSURE IS TO BE
PERFORMED THE BREAKER POLES MUST BE SWITCHED INDI
VIDUALLY 4HE READINESS OF THE BREAKER TO CARRY OUT A
TRIP
CLOSE CYCLE IS TAKEN INTO CONSIDERATION AS WELL
AS THE POSITION OF THE BREAKER PROVIDED THESE INFOR
MATIONS ARE AVAILABLE FROM THE CIRCUIT BREAKER 4HE
RECOVERY TIME OF THE BREAKER CAN BE SUPERVISED
7HEN SINGLE
POLE AUTO RECLOSURE IS USED THE AUX
ILIARY CONTACTS OF THE BREAKER POLES CAN BE CON
NECTED IN SERIES ALL THREE POLES CLOSED OR IN PARALLEL
EITHER POLE CLOSED OR BOTH CONNECTION CAN BE FED
TO THE DEVICE !LTERNATIVELY THE AUXILIARY CONTACTS OF
THE INDIVIDUAL BEAKER POLES CAN BE CONSIDERED BY
THE DEVICE "UT GENERALLY THE DEVICE CAN OPERATE
WITHOUT SUCH INFORMATIONS FROM THE CIRCUIT BREAKER
6+ CAN OPERATE IN CONJUNCTION WITH CONVENTION
AL STATIC OR NUMERICAL PROTECTION DEVICES )T REQUIRES
STARTING AND TRIPPING SIGNALS FROM THE FEEDER PROTEC
TION 7HEN SINGLE
POLE AUTO RECLOSURE IS USED EI
THER DIFFERENT TRIPPING SIGNALS MUST BE AVAILABLE FOR
SINGLE
POLE TRIP AND THREE POLE TRIP OR TRIPPING SIG
NALS MUST BE AVAILABLE FOR THE INDIVIDUAL BREAKER
POLES IN ORDER TO ALLOW DISTINCTION TO BE MADE BE
TWEEN INITIATION OF SINGLE
POLE AND THREE POLE AU
TO
RECLOSURE
/PERATION OF THE AUTO
RECLOSE FUNCTION OF 6+ IN
CONJUNCTION WITH AN EXTERNAL SYNCHRONISM CHECK
RELAY IS POSSIBLE AS WELL OPERATION OF THE CHECK SYN
CHRONISM FUNCTION OF 6+ IN CONJUNCTION WITH AN
EXTERNAL AUTO
RECLOSE DEVICE &URTHERMORE TWO
PROTECTION DEVICES WITH ONE 6+ OR TWO PROTEC
TION DEVICES WITH TWO AUTO
RECLOSE DEVICES CAN BE
USED
4HROUGHOUT A FAULT IN THE NETWORK THE MAGNITUDES OF
THE INSTANTANEOUS VALUES ARE STORED FOR A PERIOD OF
MAX  SECONDS  SECONDS AT  (Z FOR TRANS
MISSION TO A CENTRAL COMPUTER STATION AND ARE AVAIL
ABLE FOR SUBSEQUENT FAULT ANALYSIS
#ONTINUOUS MONITORING OF THE INTERNAL MEASURED VAL
UE PROCESSING CIRCUITS AND MONITORING OF THE AUXILIA
RY VOLTAGES TO ENSURE THAT THEY REMAIN WITHIN TOLER
ANCE ARE OBVIOUSLY INHERENT FEATURES
3ERIAL INTERFACES ALLOW COMPREHENSIVE COMMUNICA
TION WITH OTHER DIGITAL CONTROL AND STORAGE DEVICES
&OR DATA TRANSMISSION A STANDARDIZED PROTOCOL IN AC
CORDANCE WITH $).  IS USED 4HE DEVICE CAN
THEREFORE BE INCORPORATED IN ,OCALIZED 3UBSTATION
!UTOMATION NETWORKS ,3!