Download Print this page

Siemens SIPROTEC 7SA511 Instruction Manual page 166

Numerical distance protection relay

Advertisement

6$
9
=RQH 
VHFRQGDU\
1
FW
;
ô ;
VHF
1
YW


=RQH 
SULPDU\ 
;

;

SULP

 8  

 8
=RQH 
VHFRQGDU\
1
FW
;
ô ;
VHF
SULP
1
YW

ô  8 ô  $

=RQH 
SULPDU\ 
>
;

;

SULP
D
>

 8  


 8

 8
=RQH 
VHFRQGDU\
1
FW
;
ô ;
VHF
SULP
1
YW

ô  8 ô  $

5HVLVWDQFH VHWWLQJ
)RU UHVLVWDQFH VHWWLQJ LQ UHODWLRQ WR RYHUKHDG OLQHV
FRQVLGHUDWLRQ RI WKH DUF UHVLVWDQFH LV PRVW LPSRU
WDQW ,Q FDEOH QHWZRUNV DQ H[WHQVLYH DUF LV QRW SRVVL
EOH WKXV WKH HIIHFWLYH UHVLVWDQFH RI WKH FDEOH LWVHOI
QRUPDOO\ SOD\V WKH PRUH LPSRUWDQW UROH :LWK YHU\
VKRUW FDEOH OHQJWKV KRZHYHU LW PXVW EH HQVXUHG
WKDW WKH UHVLVWDQFH RI DQ DUF DW WKH WHUPLQDOV DW WKH
FORVHXS FDEOH HQG LV FRYHUHG E\ WKH UHVLVWDQFH
ZKLFK LV VHW IRU WKH ILUVW ]RQH
,QGHSHQGHQW ]RQHV = = DQG =  DGGUHVV EORFN 
   
' , 6 7  3 5 2 7 
, 1 ' ( 3 ( 1 ' 

,
1
ô
SULP
$
ô  8 ô  $
 8
$
XS WR = RI WKH QH[W OLQH E
 
;

D
E
 8

,
1
ô
$
 8
$
XS WR = RI WKH QH[W OLQH E
@
 
;

;


E 
F
 8 

@
,
1
ô
$
 8
$
= 2 1 ( 6
,Q WKLV H[DPSOH IRU SKDVHSKDVH DUFV DQ DUF YROW
DJH GURS RI PD[  N9 LV DVVXPHG :LWK DQ DV
VXPHG PLQLPXP VKRUW FLUFXLW FXUUHQW RI  $ WKLV
FRUUHVSRQGV WR  8 SULPDU\ )RU WKH UHVLVWDQFH VHW
WLQJ RI WKH ILUVW ]RQH WKLV UHVXOWV LQ
5
5
SULP
OLQH
 8
1
FW
5
ô 5
VHF
1
YW


 8
2QO\ KDOI RI WKH DUF UHVLVWDQFH YDOXH ZDV XVHG EH
FDXVH LW LV DGGLWLYH WR WKH ORRS LPSHGDQFH DQG RQO\
KDOI VKRXOG EH DGGHG WR WKH LPSHGDQFH SHU SKDVH
)RU HDUWK IDXOWV D VHSDUDWH UHVLVWDQFH WROHUDQFH FDQ
EH VHW ,I DQ DUF UHVLVWDQFH RI  8 DQG D UHVLVWDQFH RI
 8 IRU WKH WRZHU IRRWLQJ HDUWK SDWK DUH DVVXPHG
WKLV WKHQ OHDGV WR
5(
5
SULP
OLQH
 8
 8
1
FW
5(
ô 5(
VHF
1
YW


 8
7KLV YDOXH JLYHV DQ DGHTXDWH FOHDUDQFH WR WKH PLQL
PXP ORDG LPSHGDQFH 7KH SRZHU VZLQJ SRO\JRQ
FDQ EH LJQRUHG IRU WKH SKDVHHDUWK IDXOWV EHFDXVH
WKH SRZHU VZLQJ GHWHFWLRQ ZRUNV RQO\ ZLWK SKDVH
SKDVH PHDVXUHPHQW
127( 7KH VHWWLQJ YDOXHV 5 IRU HDFK ]RQH VKRXOG LI
SRVVLEOH QRW H[FHHG  WLPHV WKH VHW ;YDOXH
%HJLQQLQJ RI EORFN
k'LVWDQFH SURWHFWLRQ LQGHSHQGHQW ]RQHV = =
DQG =l
2SHUDWLQJ LQVWUXFWLRQV

ô 5
DUF


ô  8  8

,
1
ô
SULP
$
ô  8 ô  $
$
5
5
DUF
WRZHU
 8
 8
,
1
ô
SULP
$
ô  8 ô  $
$
&*&

Advertisement

loading