$SSHQGL['0HQX3DUDPHWHUV
6LHPHQV3RZHU7UDQVPLVVLRQ'LVWULEXWLRQ//&
' 0HQX3DUDPHWHUV
' &21),*85(!0HQX/HDGLQJ
DQG/DJJLQJ5HJXODWRUV
7KHIROORZLQJVWHSVZLOOKHOS\RXGHWHUPLQHZKLFKRIWKH
WZR UHJXODWRUV LQ D 'HOWD FRQILJXUDWLRQ LV oOHDGLQJp DQG
ZKLFKLVoODJJLQJpRQDQRSHQGHOWDLQVWDOODWLRQ
'LVDEOH DXWRPDWLF FRQWURORIWDSFKDQJHU6HW5DLVH
/RZHU WDS VZLWFK WR 2)) 6HW 5HPRWH$XWR0DQXDO
VZLWFKRQERWKFRQWUROOHUVWR0DQXDO
8VH WKH&RQILJXUDWLRQ.H\VWR WHPSRUDULO\VHW ERWK
FRQWUROOHUV WR 6\VWHPW\SH :<(7KLVZLOO EHFRU
UHFWHGLQVWHS
$VVXUHWKDWWKHUHLVORDGFXUUHQWRQWKHOLQH/RDGFXU
UHQWPXVWEHRIVXIILFLHQWPDJQLWXGHWRFDXVHDGHIL
QLWHUHVSRQVHRI WKHOLQHGURSFRPSHQVDWLRQFLUFXLW
1RUPDOO\ RI WKH UHJXODWRU VHWWLQJ ZLOO EH DGH
TXDWH
$GMXVWERWKIURQWSDQHOFRQWUROVWRWKHVDPHVHWWLQJV
%DQGZLGWK 9
9ROWDJH/HYHO 9
7LPH'HOD\ 6HFRQGV
5HVLVWDQFH9ROWV 9
5HDFWDQFH9ROWV
6HWWKH5HPRWH$XWR0DQXDOVZLWFKWR$872RQERWK
FRQWUROOHUV
$OORZERWKUHJXODWRUVWRUXQDQGFRPHWRUHVWLQEDQG
7KHUHJXODWRUZKRVHWDSSRVLWLRQLV FORVHVW WR PD[L
PXPLVWKHoODJJLQJpUHJXODWRU7KHRWKHUUHJXODWRULV
WKHoOHDGLQJpUHJXODWRU
1RWH 7KH DPRXQW RI WDSFKDQJH H[FXUVLRQ FDQ EH
PDGHPRUHRUOHVV LIGHVLUHGE\DSSURSULDWH
DGMXVWPHQWRIWKHUHDFWDQFHYROWVVHWWLQJ
8VHWKH&RQILJXUDWLRQNH\VWRVHWWKH6\VWHPW\SHWR
'HOWD/HDGIRUWKHOHDGLQJUHJXODWRUDQGWR'HOWD/DJ
IRUWKHODJJLQJUHJXODWRUDVGHWHUPLQHGLQVWHS
' 5(*8/$725!0HQX/LQH'URS
&RPSHQVDWLRQ
7KHUH DUH VHYHUDO PHWKRGV XVHG WR GHWHUPLQH OLQH GURS
FRPSHQVDWLRQ VHWWLQJV 7KH o/RDG &HQWHUp PHWKRG LV
SUREDEO\WKHPRVWFRPPRQO\XVHGDQGPRVWFOHDUO\LOOXV
WUDWHVWKHSURFHGXUH
8VLQJ NQRZOHGJH RI WKH GLVWULEXWLRQ IHHGHU DQG WKH
WDEOHVEHORZHVWDEOLVKWKHFRQGXFWRUUHVLVWDQFHDQG
UHDFWDQFHSHUPLOHRIIHHGHU
(;$03/(&RQGXFWRU$&655HJXODU)ODW6SDFLQJDW
LQFKHV
5 RKPVPLOH; RKPVPLOH
'HWHUPLQHFRPSHQVDWLRQPXOWLSOLHUNDV
q 6LQJOHSKDVH
q :\H&RQQHFWHG
q 'HOWD&RQQHFWHG
(;$03/(7KHUHJXODWRUVLQYROYHGDUHN9$DW
N9FRQILJXUHGLQDZ\HFRQQHFWHGWKUHHSKDVHEDQN7KH
&7SULPDU\IRUWKLVUHJXODWRULV$
1RWH 0XOWLSOLHUVIRUPDQ\FRPPRQV\VWHPYROWDJHV
DQGUHJXODWRUUDWLQJVDUHLQFOXGHGLQWDEOHV'
DQG'EHORZ
'HWHUPLQHWKH/LQH'URS&RPSHQVDWLRQ6HWWLQJV
5HVLVWLYH&RPSHQVDWLRQ6HWWLQJ N[OLQHOHQJWKPL[
UHVLVWDQFHRKPVPL
5HDFWLYH&RPSHQVDWLRQ6HWWLQJ N[OLQHOHQJWKPL[
UHDFWDQFHRKPVPL
(;$03/(7KHOLQHLVPLOHVORQJ
5HVLVWDQFH6HWWLQJ [[ 9
5HDFWDQFH6HWWLQJ [[ 9
D 24 x 24 x 48
3
30 inches
==
k=2.0x
Current Transformer Rating
Voltage Transformer Ratio
k=1.0x
Current Transformer Rating
Voltage Transformer Ratio
k = 1.73x
Current Transformer Rating
Voltage Transformer Ratio
k=1.0
400
7200