/PERATING INSTRUCTIONS
3$
6
# ' #
3WITCHING TESTS AND STARTING A TEST FAULT RECORD
ADDRESS BLOCK
! FAULT RECORD STORAGE CAN BE STARTED USING THE OPER
ATING PANEL OR VIA THE OPERATING INTERFACE 3TARTING A
TEST FAULT RECORD IS ALSO POSSIBLE VIA A BINARY INPUT
PROVIDED THIS IS ACCORDINGLY ALLOCATED &.O
3TART <2EC
4HE CONFIGURATION PARAMETERS AS SET IN ADDRESS
BLOCK ARE DECISIVE FOR THIS FAULT RECORDING REFER TO
3ECTION ADDRESS CONCERNS TRIGGERING VIA
BINARY INPUT ADDRESS TRIGGERING VIA THE OPERAT
ING KEYBOARD OR VIA THE OPERATING INTERFACE 4HE PRE
TRIGGER TIME WAS SET UNDER ADDRESS
3CANNING A TEST FAULT RECORD IS ESPECIALLY INTERESTING
FOR USE ON CABLES AND LONG OVERHEAD LINES WHERE
CONSIDERABLE INRUSH CURRENTS CAN BE PRODUCED BY
CHARGING OF THE LINE CAPACITANCES 4HE INFLUENCE OF
THESE CHARGING CURRENTS CAN BE TESTED BY ENERGIZING
THE LINE FROM ONE END SEVERAL TIMES
4HE DIFFERENTIAL PROTECTION SHOULD BE SWITCHED TO
",/#+ 42)0 2%,
ADDRESS DURING THESE
SWITCHING TESTS IN ORDER TO AVOID TRIPPING
4HE FAULT RECORD IS TRIGGERED VIA A BINARY INPUT AT THE
INSTANT OF THE BREAKER CLOSING COMMAND
#ONCLUSIONS AS TO THE SAFETY MARGIN BETWEEN THE
MAXIMUM INRUSH CURRENT AND THE PICKUP VALUES CAN
BE DRAWN FROM THE RECORDING OF THE SUMMATION CUR
RENT AND THE DIFFERENTIAL CURRENT )F NECESSARY THE
PICKUP VALUE OF THE DIFFERENTIAL PROTECTION AT BOTH
LINE ENDS MUST BE INCREASED ADDRESS REFER
ALSO TO 3ECTION
-ANUAL STARTING OF A FAULT RECORD CAN BE CARRIED OUT IN
ADDRESS BLOCK WHICH CAN BE REACHED BY PAGING
WITH
Å
OR
Ç
OR BY DIRECT DIALLING WITH
$! %
4HE START ADDRESS IS REACHED WITH
!
4 % 3 4
& ! 5 , 4
2 % # / 2 $ ) . '
"EGINNING OF BLOCK 4EST FAULT RECORDING
PAGE ON WITH
!
TO ADDRESS
& ! 5 , 4
2 % #
3 4 ! 2 4
3TART FAULT RECORDING #ONFIRM WITH
*9
KEY OR ABORT
WITH PAGEON KEY
!
4HE RELAY ACKNOWLEDGES SUCCESSFUL COMPLETION OF THE
TEST RECORDING
3 5 # # % 3 3 & 5 ,
!FTER TESTS
DO NOT FORGOT TO SWITCH THE DIFFERENTIAL PROTECTION
/.
ADDRESS
Summary of Contents for 7SD502
Page 148: ... PPENDIX 3 6 PPENDIX ENERAL DIAGRAMS ONNECTION DIAGRAMS 4ABLES ...
Page 176: ... 3 6 ...
