Siemens 7VK512

/PERATING INSTRUCTIONS6+
6
#
' #

)F THE SYNCHRONISM AND VOLTAGE CHECK FUNCTION IS
USED NOTE THAT THE FEEDER VOLTAGE IS DESIGNATED WITH
5 IT IS THE REFERENCE VOLTAGE FOR THE DEVICE FUNC
TIONS WHICH OPERATE WITH MEASURED VOLTAGES 4HE
BUS
BAR VOLTAGE IS DESIGNATED 5
)F A POWER TRANSFORMER IS INSTALLED BETWEEN THE BUS
BAR AND THE LOCATION OF THE FEEDER VOLTAGE TRANSFORM
ERS THEN THE PHASE DISPLACEMENT ACCORDING TO THE
POWER TRANSFORMER CONNECTION GROUP MUST BE COM
PENSATED 4HIS CAN BE DONE USING THE PARAMETER AD
DRESS 
4HE SECONDARY RATED VOLTAGES OF THE VOLTAGE TRANS
FORMERS MUST BE EQUAL !DDITIONALLY THE PRIMARY
RATED VOLTAGES OF THE FEEDER VOLTAGE TRANSFORMERS ON
THE ONE HAND AND THE BUS
BAR VOLTAGE TRANSFORM
ERS ON THE OTHER HAND MUST RELATE TO THE TRANSFOR
MATION RATIO OF THE POWER TRANSFORMER
)F NO PHASE SHIFTING ELEMENT ARE INSTALLED BETWEEN
BUS
BAR AN FEEDER VOLTAGES LEAVE ADDRESS  ON
THE PRESET VALUE 
 /THERWISE IT MUST BE NOTED THAT
THE PHASE DISPLACEMENT COUNTS POSITIVE FROM THE
FEEDER CIRCUIT TO THE BUS
BAR CIRCUIT
%XAMPLE
"US BAR  K6 PRIMARY
 6 SECONDARY
&EEDER  K6 PRIMARY
 6 SECONDARY
! POWER TRANSFORMER SHOULD BE INSTALLED BETWEEN
BUS
BAR VOLTAGE TRANSFORMERS AND FEEDER VOLTAGE
TRANSFORMERS
0OWER TRANSFORMER  K6  K6
CONNECTION GROUP $YN
4HE CONNECTION GROUP OF THE POWER TRANSFORMER IS
DEFINED FROM THE UPPER VOLTAGE SIDE TO THE LOWER VOLT
AGE SIDE 4HE FEEDER VOLTAGE TRANSFORMERS WHICH
ARE THE REFERENCE VOLTAGES FOR THE PROTECTION RELAY
ARE INSTALLED ON THE LOWER VOLTAGE SIDE OF THE POWER
TRANSFORMER 4HUS THE PHASE DISPLACEMENT ACCORD
ING TO THE CONNECTION GROUP NUMERAL IE  } ^
MUST BE ENTERED AS NEGATIVE VALUE
3ETTING WILL BE ADDRESS 
0() 5
5  ^
 5 5 !.',
 ^
0HASE DISPLACEMENT BETWEEN 5 FEEDER VOLTAGE AND
5 BUS
BAR VOLTAGE FOR SYNCHRONISM CHECK
3MALLEST SETTING VALUE
 ^
,ARGEST SETTING VALUE  ^
4HE CLOSING TIME OF THE CIRCUIT BREAKER ADDRESS 
IS NECESSARY IF THE SYNCHRO
CHECK FUNCTION OF THE
RELAY IS USED ALSO FOR ASYNCHRONOUS SWITCHING )N THIS
CASE THE RELAY CALCULATES THE IDEAL CLOSING INSTANT
SUCH THAT THE TWO VOLTAGES BUS
BAR AND FEEDER ARE
IN SYNCHRONISM AT THE INSTANT WHEN THE BREAKER
POLES CONTACT EACH OTHER
5NDER ADDRESS  THE MINIMUM CLOSE COMMAND
DURATION CAN BE SET 4HIS TIME IS THEN VALID FOR ALL
FUNCTIONS OF THE DEVICE WHICH CAN CLOSE THE CIRCUIT
BREAKER )T MUST BE LONG ENOUGH TO ENSURE RELIABLE
CLOSURE OF THE CIRCUIT BREAKER !N EXCESSIVELY LONG
TIME DOES NOT PRESENT ANY DANGER SINCE THE CLOSING
COMMAND WILL BE INTERRUPTED AT ONCE ON OCCURRENCE
OF A RENEWED TRIP COMMAND
 4 #" #,/3%
 S
#IRCUIT BREAKER CLOSING TIME RELEVANT ONLY IN CASE
ASYNCHRONOUS SWITCHING IS USED IN CONNECTION WITH
SYNCHRO
CHECK
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
 S
 S
 4 #,/3%
 S
-AXIMUM DURATION OF CLOSE COMMAND
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
 S
 S