-ETHOD OF OPERATION
6+
6
# ' #
!NCILLARY FUNCTIONS
4HE ANCILLARY FUNCTIONS OF THE NUMERICAL AUTO RECLO
SURE RELAY 6+ INCLUDE
0ROCESSING OF ANNUNCIATIONS
3TORAGE OF MEASURED DATA FOR FAULT RECORDING
/PERATIONAL MEASUREMENTS AND TESTING ROUTINES
-ONITORING FUNCTIONS
0ROCESSING OF ANNUNCIATIONS
!FTER A FAULT IN THE PROTECTED OBJECT INFORMATION CON
CERNING THE RESPONSE OF THE DEVICE AND KNOWLEDGE
OF THE MEASURED VALUES ARE OF IMPORTANCE FOR AN EX
ACT ANALYSIS OF THE HISTORY OF THE FAULT &OR THIS PUR
POSE THE DEVICE PROVIDES ANNUNCIATION PROCESSING
WHICH IS EFFECTIVE IN THREE DIRECTIONS
)NDICATORS AND BINARY OUTPUTS
SIGNAL RELAYS
)MPORTANT EVENTS AND CONDITIONS ARE INDICATED BY
OPTICAL INDICATORS ,%$ ON THE FRONT PLATE 4HE MOD
ULE ALSO CONTAINS SIGNAL RELAYS FOR REMOTE SIGNALLING
-OST OF THE SIGNALS AND INDICATIONS CAN BE MAR
SHALLED IE THEY CAN BE ALLOCATED MEANINGS OTHER
THAN THE FACTORY SETTINGS )N 3ECTION THE DELIVERED
CONDITION AND THE MARSHALLING FACILITIES ARE DE
SCRIBED IN DETAIL
4HE OUTPUT SIGNAL RELAYS ARE NOT LATCHED AND AUTO
MATICALLY RESET AS SOON AS THE ORIGINATING SIGNAL DIS
APPEARS 4HE ,%$S CAN BE ARRANGED TO LATCH OR TO BE
SELF RESETTING
4HE MEMORIES OF THE ,%$S CAN BE SAFE AGAINST SUP
PLY VOLTAGE FAILURE 4HEY CAN BE RESET
LOCALLY BY OPERATION OF THE RESET BUTTON ON THE
RELAY
REMOTELY BY ENERGIZATION OF THE REMOTE RESET IN
PUT
AUTOMATICALLY ON OCCURRENCE OF A NEW GENERAL
PICK UP SIGNAL
3OME INDICATORS AND RELAYS INDICATE CONDITIONS IT IS
NOT APPROPRIATE THAT THESE SHOULD BE STORED %QUALLY
THEY CANNOT BE RESET UNTIL THE ORIGINATING CRITERION
HAS BEEN REMOVED 4HIS MAINLY CONCERNS FAULT INDI
CATIONS SUCH AS AUXILIARY VOLTAGE FAULT ETC
! GREEN ,%$ INDICATES READINESS FOR OPERATION 4HIS
,%$ CANNOT BE RESET AND REMAINS ILLUMINATED WHEN
THE MICROPROCESSOR IS WORKING CORRECTLY AND THE UNIT
IS NOT FAULTY 4HE ,%$ EXTINGUISHES WHEN THE SELF
CHECKING FUNCTION OF THE MICROPROCESSOR DETECTS A
FAULT OR WHEN THE AUXILIARY VOLTAGE IS ABSENT
7ITH THE AUXILIARY VOLTAGE PRESENT BUT WITH AN EXIST
ING INTERNAL FAULT IN THE UNIT A RED ,%$ ILLUMINATES
"LOCKED AND BLOCKS THE UNIT
)NFORMATION ON THE DISPLAY PANEL OR TO
A PERSONAL COMPUTER
%VENTS AND CONDITIONS CAN BE READ OFF IN THE DISPLAY
ON THE FRONT PLATE OF THE DEVICE !DDITIONALLY A PER
SONAL COMPUTER FOR EXAMPLE CAN BE CONNECTED VIA
THE OPERATION INTERFACE AND ALL THE INFORMATIONS CAN
THEN BE SENT TO IT
)N THE QUIESCENT STATE IE AS LONG AS NO NETWORK
FAULTS ARE PRESENT THE DISPLAY OUTPUTS SELECTABLE OP
ERATING INFORMATION USUALLY AN OPERATIONAL MEA
SURED VALUE MODELS WITH SYNCHRONISM AND VOLTAGE
CHECK IN EACH OF THE TWO LINES )N THE EVENT OF A NET
WORK FAULT SELECTABLE INFORMATION ON THE FAULT AP
PEARS INSTEAD OF THE OPERATING INFORMATION EG DE
TECTED PHASES 4HE QUIESCENT INFORMATION IS DIS
PLAYED AGAIN ONCE THESE FAULT ANNUNCIATIONS HAVE
BEEN ACKNOWLEDGED 4HE ACKNOWLEDGEMENT IS
IDENTICAL TO RESETTING OF THE STORED ,%$ DISPLAYS AS IN
3ECTION
4HE DEVICE ALSO HAS SEVERAL EVENT BUFFERS EG FOR
OPERATING MESSAGES CIRCUIT BREAKER OPERATION STA
TISTICS ETC REFER TO 3ECTION WHICH CAN BE SAVED
AGAINST SUPPLY VOLTAGE FAILURE BY A BUFFER BATTERY
4HESE MESSAGES AS WELL AS ALL AVAILABLE OPERATING
VALUES CAN BE TRANSFERRED INTO THE FRONT DISPLAY AT
ANY TIME USING THE KEYBOARD OR TO THE PERSONAL COM
PUTER VIA THE OPERATING INTERFACE
!FTER A FAULT FOR EXAMPLE IMPORTANT INFORMATION CON
CERNING ITS HISTORY SUCH AS PICK UP AND TRIPPING
CAN BE CALLED UP ON THE DISPLAY OF THE DEVICE 4HE
FAULT INCEPTION IS INDICATED WITH THE ABSOLUTE TIME OF
THE OPERATING SYSTEM PROVIDED THIS FEATURE IS AVAIL
ABLE 4HE SEQUENCE OF THE EVENTS IS TAGGED WITH THE
RELATIVE TIME REFERRED TO THE MOMENT AT WHICH THE
FAULT DETECTOR HAS PICKED UP 4HE RESOLUTION IS MS
