Schweitzer Engineering Laboratories SEL-321-3, Instruction Manual

Page: 316 / 404

7-48 Maintenance and Testing Date Code 20010213
SEL-321-3 Instruction Manual
Ground Quadrilateral Distance Element Resistive Reach Test Using Three Voltage
Sources and One Current Source
1RWH 7KLVWHVWUHIHUVGLUHFWO\WRWKH=RQHJURXQGTXDGULODWHUDOGLVWDQFHHOHPHQWEXWPD\
EHDSSOLHGWRDQ\RWKHUIRUZDUGUHDFKLQJJURXQGTXDGULODWHUDOGLVWDQFHHOHPHQW]RQH
7RWHVWUHYHUVHUHDFKLQJ]RQHVVLPSO\DGGƒWRWKHFDOFXODWHGWHVWFXUUHQWSKDVH
DQJOH9HULI\FRUUHFWRSHUDWLRQRIWKH45HOHPHQWIRUWKHWHVWYROWDJHDQGFXUUHQW
VLJQDOVXVLQJ(TXDWLRQLQWKH1HJDWLYH6HTXHQFH'LUHFWLRQDO(OHPHQW7HVW
3URFHGXUH
6WHS ([HF2:6(7FRPPDQGDQGYHULI\WKHIROORZLQJUHOD\VHWWLQJV=0$*
=$1*48$'=',5;*5*/*N0N$7=)DQG4)
7KHH[DPSOHUHOD\VHWWLQJVXVHWKHIROORZLQJVHWWLQJV=0$* W =$1*
ƒ48$'= ',5 );* W 5* W / *
N0 N$ 7 =) W 4) DPSV
VHFRQGDU\
([HFXWHWKH 6(7 FRPPDQGDQGFKDQJHWKHIROORZLQJVHWWLQJV&KDQJH*0+2=WR
148$'=WRDQG(/23IURP<WR1&KDQJLQJWKH*0+2=VHWWLQJSUHYHQWV
WKHUHOD\JURXQGPKRGLVWDQFHHOHPHQWVIURPLQWHUIHULQJZLWKWKHWHVW&KDQJLQJWKH
(/23VHWWLQJSUHYHQWVWKH/RVVRI3RWHQWLDOORJLFIURPEORFNLQJRSHUDWLRQRIWKH
UHOD\GLVWDQFHHOHPHQWVLIWKHWHVWVLJQDOVIXOILOO/RVVRI3RWHQWLDOFRQGLWLRQV
6WHS 6HOHFWDQRXWSXWFRQWDFWWRLQGLFDWHRSHUDWLRQRIWKH=*HOHPHQW,QWKLVH[DPSOH
XVHWKH287RXWSXW
)URP$FFHVV/HYHOH[HFXWHWKH 6(7/Q FRPPDQGWRFRQILJXUH2XWSXWWRFORVH
IRUDVVHUWLRQRIWKH=*HOHPHQW
!!6(7/287(17(5!
6(/RJLFJURXS
287 1$
"=*(17(5!
287 45
"(1'(17(5!
$IWHU\RXW\SH (1'(17(5! WRHQGWKHVHWSURFHGXUHWKHUHOD\GLVSOD\VWKH
FXUUHQWORJLFVHWWLQJV7\SH < (17(5 ! WRDFFHSWWKRVHVHWWLQJV
&RQQHFWRXWSXW287WRWKHVHQVHLQSXWRI\RXUWHVWVHWDQRKPPHWHURUVRPHRWKHU
FRQWDFWVHQVLQJGHYLFH
6WHS &RQQHFWWKHYROWDJHVRXUFHVWRWKH$SKDVH%SKDVHDQG&SKDVHWRQHXWUDOUHOD\
YROWDJHLQSXWV&RQQHFWWKHFXUUHQWVRXUFHWRWKH$SKDVHUHOD\FXUUHQWLQSXW5HIHU
WRWKHYROWDJHDQGFXUUHQWFRQQHFWLRQVVKRZQLQ)LJXUHDVDQH[DPSOH
6WHS 6HOHFWWKHPDJQLWXGHRIWKHWHVWVLJQDOV,
$
DQG9
$
7DEOHVXPPDUL]HVWKHWHVWTXDQWLWLHVIRUWKH=RQH$*JURXQGTXDGULODWHUDO
GLVWDQFHHOHPHQWEDVHGXSRQWKHH[DPSOHUHOD\VHWWLQJV