Siemens SIPROTEC 7SJ531 - Page 91

-ETHOD OF OPERATION3*
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' #
 %XECUTION AND MONITORING OF THE COMMAND
4HE COMMAND EXECUTION IS INITIATED BY PUSHING THE
COMMAND RELEASE KEY #ORRESPONDING ANNUNCI
ATIONS ARE CREATED INSIDE THE RELAY CONTAINING THE
BREAKER DESIGNATION THE CONTROL SOURCE THE TYPE
COMMAND OR FEEDBACK THE RESULT POSITIVE OR NEG
ATIVE AND THE SWITCHING DIRECTION4ABLE  LISTS THE
COMMAND ANNUNCIATIONS AND THEIR MEANING 7HEN
ALL CONDITIONS ARE FULFILLED AND THE COMMAND RELAY IS
MARSHALLED ACCORDINGLY THE COMMAND IS GIVEN &IG
URE  SHOWS AN EXAMPLE OF THE PROCEDURE AND
SOME ANNUNCIATIONS OF THE COMMAND INPUT 4HE AN
NUNCIATIONS ARE SHOWN BELOW THE FEEDER MIMIC DIA
GRAM INSTEAD OF THE BAR INDICATION OF THE HIGHEST
PHASE CURRENT
4OGETHER WITH THE COMMAND OUTPUT A MONITORING
TIME IS STARTED COMMAND RUNNING TIME MONITORING
TO CHECK WHETHER THE CIRCUIT BREAKER REACHES THE DE
SIRED FINAL STATE WITHIN THIS TIME SEE &IGURE 
5PON RECEIVING THE
BREAKER STATE FEEDBACK SIGNAL
THE COMMAND RELAY DROPS OUT AND THE MONITORING
TIME IS STOPPED )N CASE OF A MISSING FEEDBACK THE
ALARM
COMMAND RUNNING TIME EXPIRED #2 TIME
EXP
IS GIVEN
!NY SWITCHING COMMAND CAN ALWAYS BE INTERRUPTED
BY A PROTECTION TRIP COMMAND
 4IME
OUT OF THE COMMAND RUNNING
TIME
4HE RELAY
S REACTION TO THE ALARM COMMAND RUNNING
TIME EXPIRED #2 TIME EXP
CAN BE PARAMETER
IZED TO MAKE SURE THAT THE CANCELLATION OF THE COM
MAND DOES NOT DAMAGE THE COMMAND RELAY )T CAN
BE SELECTED WHETHER THE RUNNING SWITCHING COM
MAND SHALL DROP OUT AFTER EXCEEDING THE MONITORING
TIME OR WHETHER IT SHALL BE MAINTAINED AND FAILURE OF
THE SWITCHING COMMAND SHALL ONLY BE INDICATED BY
ALARM RELAYS OR ,%$S )N THIS CASE THE SWITCHING COM
MAND REMAINS ACTIVE UNTIL RECEIVING THE CORRESPOND
ING BREAKER STATE FEEDBACK SIGNAL
7HEN THE COMMAND RUNNING TIME IS EXPIRED THE IN
TERMEDIATE STATE MONITOR FOR THE CORRESPONDING
SWITCHING DEVICE IS REACTIVATED )F AN INTERMEDIATE
STATE IS DETECTED THEN THE PARAMETERIZED FEEDBACK
TIME DELAY 4
&" #" IS DISREGARDED
 #OMMAND EXTENSION TIME
)N ORDER TO MAKE SURE THAT THE BREAKER REACHES ITS FI
NAL POSITION IT IS IN SOME CASES NECESSARY TO KEEP THE
COMMAND RELAY ENERGIZED FOR A DEFINED TIME AFTER RE
CEIVING THE FEEDBACK SIGNAL &OR THIS PURPOSE A COM
MAND EXTENSION TIME 4
%84 #"
IS PROVIDED
4
%84 #"
FLASHING OF THE
OPERATED DEVICE
START
COMMAND OUTPUT
START MONITOR
OF THE COMMAND
RUNNING TIME
MONITOR OF
THE FEED
BACK

 S
0

END COMMAND
OUTPUT
MONITORING
OF THE EXPECTED
FEEDBACK SIGNAL
END
FLASHING
4
&" #"
RECEPTION OF THE
EXPECTED
FEEDBACK SIGNAL

4
3&" %.$
COMMAND
EXTENSION TIME

 S
34/03 34/03 ./4
42)0 #-$
&IGURE  'ENERAL COMMAND PROCESS
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