/PERATING INSTRUCTIONS
3$
6
# ' #
#HECKING OF THE CURRENT TRANSFORMER AND PILOT WIRE CONNECTIONS AT BOTH LINE
ENDS
!FTER COMPLETION OF THE CURRENT TEST ACCORDING TO
3ECTION ONLY FEW CONNECTION ERRORS ARE POSSI
BLE CYCLIC INTERCHANGE OF THE CURRENT CIRCUITS COM
PLETE WRONG POLARITY OF THE CURRENT CONNECTIONS OR
THE PILOT WIRES 4HE FOLLOWINGS TEST IS CARRIED OUT AT
ANY DESIRED LINE END OF A TWOTERMINAL LINE
4HE LINE IS ENERGIZED AT BOTH SIDES FOR THESE FINAL
CHECKS 4HE THROUGHFLOWING LOAD CURRENT MUST
AMOUNT AT LEAST OF RATED LINE CURRENT 4HE DIREC
TION OF THE LOAD CURRENT IS OF NO CONCERN 4EST IS INITI
ATED AT ANY DESIRED LINE END USING ADDRESS
- % ! 3
) )
4 % 3 4
!FTER CONFIRMATION WITH THE 9ES KEY
*9
THE CURRENTS
)
)
)
DIFF
AND THE PHASE ANGLE BETWEEN )
AND )
WILL BE
MEASURED OR CALCULATED
#ONFIRM WITH THE 9ES KEY
*9
4HE RELAY MEASURES
THE MIXED OUTPUT CURRENT OF THE SUMMATION CT )
LO
CAL LINE END "Y MEANS OF THE PILOT WIRE CURRENT )
A
AND
THE SHUNT CURRENT )
B
THE CURRENT AT THE OPPOSITE LINE
END )
THE PHASE ANGLE BETWEEN )
AND )
AND THE
DIFFERENTIAL CURRENT )
DIFF
ARE CALCULATED 4HE RESULTS ARE
DISPLAYED IMMEDIATELY 9OU CAN PAGE THROUGH THE
VALUES USING THE .O KEY
.
OR PAGE BACK USING
THE BACKSPACE KEY
2
"UT IF A SYSTEM FAULT IS DE
TECTED NO MEASUREMENT CAN TAKE PLACE ! CORRE
SPONDING MESSAGE IS DISPLAYED
- % ! 3
) )
)
) ) N
4HE LOCAL MEASURED CURRENT )
IS DISPLAYED REFERRED TO
THE RATED RELAY CURRENT EG CONTINUE WITH THE
.O KEY
.
- % ! 3
) )
)
) ) N
4HE MEASURED CURRENT )
AT THE OPPOSITE LINE END IS DIS
PLAYED REFERRED TO THE RATED RELAY CURRENT EG CON
TINUE WITH THE .O KEY
.
- % ! 3
) )
4HE PHASE DISPLACEMENT
´
BETWEEN THE MEASURED CUR
RENTS AT BOTH LINE ENDS IS DISPLAYED SHOULD BE
CONTINUE WITH THE .O KEY
.
´
- % ! 3
) )
) $
) ) N
4HE DIFFERENTIAL CURRENT )
DIFF
IS DISPLAYED REFERRED TO THE
RATED RELAY CURRENT IT SHOULD BE NEGLIGIBLE
- % ! 3
) )
& , 4
) .
0 2 / ' 2 % 3 3
7HEN MEASUREMENT WAS UNSUCCESSFUL A CORRESPOND
ING MESSAGE IS DISPLAYED
! " / 2 4 % $
-EASUREMENT IS ABORTED EG BECAUSE OF OCCURRENCE OF
A SYSTEM FAULT
# 5 2 2 . 4
4 / /
3 - ! , ,
4HE INJECTED CURRENT IS TOO SMALL FOR EVALUATION
! SYSTEM FAULT IS IN PROGRESS
Содержание 7SD502
Страница 148: ... PPENDIX 3 6 PPENDIX ENERAL DIAGRAMS ONNECTION DIAGRAMS 4ABLES ...
Страница 176: ... 3 6 ...