Download Print this page

Siemens SIPROTEC 7SA511 Instruction Manual page 163

Numerical distance protection relay

Advertisement

6$
9
)RU PDQXDO FORVXUH RQWR WKH VKRUW FLUFXLW WKH GLV
WDQFH SURWHFWLRQ FDQ EH VHW IRU YDULRXV YDOXHV RI
UHDFK DGGUHVV   )RU = ())(&7,9( QR VSHFLDO
PHDVXUHV DUH WDNHQ 3RVVLEOH PHDVXUHV DUH VZLWFK
WR RYHUUHDFK ]RQH LQVWDQWDQHRXV GLUHFWLRQDO =%
',5(&7,21$/ RU RYHUUHDFK ]RQH LQVWDQWDQHRXV
QRQGLUHFWLRQDO =% 121 ',5(&7 RU )' ())(&
7,9( LH IDXOW GHWHFWLRQ LQVWDQWDQHRXV QRQGLUHF
WLRQDO 3UHUHTXLVLWH LV WKDW WKH PDQXDO FORVLQJ FRP
PDQG LV IHG WR WKH UHOD\ YLD D ELQDU\ LQSXW IURP WKH
GLVFUHSDQF\ VZLWFK
,I WKH GLVWDQFH SURWHFWLRQ RSHUDWHV WRJHWKHU ZLWK WKH
LQWHJUDWHG RU DQ H[WHUQDOO\ FRQQHFWHG DXWRUHFORVH
GHYLFH DGGUHVV  GHWHUPLQHV ZKLFK GLVWDQFH
]RQH LV YDOLG EHIRUH DXWRUHFORV]UH 1RUPDOO\ PHD
VXUHPHQW IRU WKH 5$5 F\FOH WDNHV SODFH LQ WKH H[
WHQGHG RYHUUHDFK ]RQH =% 7KLV FDQ EH FKDQJHG
E\ VHWWLQJ 5$5 ! =% WR 12 2YHUUHDFKLQJ ]RQH
=% LV QRW UHOHDVHG E\ WKH 5$5 IXQFWLRQ LQ WKLV FDVH
=RQH = LV HIIHFWLYH FRQWLQXRXVO\
)RU '$5 IXUWKHU DXWRUHFORVH F\FOHV  D VHSDUDWH
   
0 $ 1 
=  %
' , 5 ( & 7 , 2 1 $ /
=  %
1 2 1  ' , 5 ( & 7 
) '
( ) ) ( & 7 , 9 (
= 
( ) ) ( & 7 , 9 (
   
5 $ 5
< ( 6
1 2
   
' $ 5
=  
7 
=  
7  %
&*&
'LVWDQFH PHDVXULQJ UDQJH ZKLFK LV YDOLG ZKHQ WKH
& / 2 6 (
FLUFXLW EUHDNHU LV FORVHG PDQXDOO\
=% ',5(&7,21$/ LH WKH RYHUUHDFK ]RQH GLUHF
=% 121 ',5(&7 LH WKH RYHUUHDFK ]RQH QRQ
)' ())(&7,9(
= ())(&7,9(
=RQH =% LV HIIHFWLYH EHIRUH 5$5
 !
=  %
<(6
12
,I '$5 QG DQG IXUWKHU VKRWV LV EORFNHG
% / 2 & .
= 7
= 7%
GLVWDQFH ]RQH =/ LV DYDLODEOH 5HOHDVH RI WKLV ]RQH
EHIRUH D '$5 F\FOH FDQ EH EORFNHG E\ VHWWLQJ DG
GUHVV  '$5 !=/ WR 12 7KH '$5 F\FOHV FDQ
DOVR EH EORFNHG E\ D ELQDU\ LQSXW 2QH FDQ VHOHFW WKH
VWDJH WKDW VKRXOG EH HIIHFWLYH GXULQJ EORFNLQJ RI WKH
'$5 F\FOHV DGGUHVV   1RUPDOO\ = ZLWK 7 LV
HIIHFWLYH LQ WKLV FDVH WKLV FDQ EH FKDQJHG WR = ZLWK
7%
,I D OLQH WR EH SURWHFWHG LV FRPSRVHG RI RYHUKHDG OLQH
DQG FDEOH VHFWLRQV WKH FRQWUROOHG ]RQHV =% DQG
=/ FDQ EH XVHG WR GLVWLQJXLVK EHWZHHQ IDXOWV RQ WKH
WKH RYHUKHDG VHFWLRQ DQG FDEOH IDXOWV WR D FHUWDLQ
GHJUHH 5HFORVXUH FDQ EH EORFNHG IRU FDEOH IDXOWV
XVLQJ DGGUHVVHV  DQG  ,I IRU H[DPSOH D
FDEOH VHFWLRQ LV IROORZHG E\ DQ RYHUKHDG OLQH VHF
WLRQ ]RQH =% LV VHW WR FRYHU WKH FDEOH VHFWLRQ DQG
DGGUHVV  LV VHW VXFK WKDW UHFORVXUH LV EORFNHG
IRU IDXOWV :,7+,1 =% ,I IXUWKHU VHJUHJDWLRQ LV QHFHV
VDU\ HJ FDEOH  RYHUKHDG OLQH  FDEOH  GLVWLQFWLRQ
FDQ EH PDGH E\ DGGUHVV  LQ VLPLODU ZD\ ,Q DOO
RWKHU FDVHV ERWK DGGUHVVHV UHPDLQ LQ SRVLWLRQ 12
WLRQDO DV VHW LQ DGGUHVV 
GLUHFWLRQDO
LH IDXOW GHWHFWLRQ ]RQH QRQ
GLUHFWLRQDO
LH WKH QRUPDO ILUVW ]RQH
QR VSHFLDO PHDVXUHV
RU
]RQH = LV YDOLG ZLWK GHOD\ 7
]RQH = LV YDOLG ZLWK GHOD\ 7%
2SHUDWLQJ LQVWUXFWLRQV


Advertisement

loading