Date Code 20010215
Maintenance and Testing
7-21
SEL-321-5 Instruction Manual
6WHS
7KH33RYHUFXUUHQWHOHPHQWVRSHUDWHEDVHGXSRQWKHPDJQLWXGHRIWKHYHFWRU
GLIIHUHQFHEHWZHHQDQ\WZRSKDVHFXUUHQWV8VLQJWKHFXUUHQWFRQQHFWLRQVVKRZQLQ
%&
LVWZLFHWKHPDJQLWXGHRIWKHDSSOLHGFXUUHQW7KLV
LVLOOXVWUDWHGE\WKHIROORZLQJHTXDWLRQV
7(67
%&
%
%&
&
%
%&
&
%
7(67
,
,
,
,
,
,
,
,
,
,
¼
=
¼
=
-
=
-
=
=
(TXDWLRQ
:LWKD33VHWWLQJRI$33SLFNVXSZKHQ,
7(67
LVJUHDWHUWKDQ$
6WHS
7XUQRQWKHFXUUHQWWHVWVRXUFHDQGVORZO\LQFUHDVHWKHPDJQLWXGHRIFXUUHQWDSSOLHG
XQWLOWKH33HOHPHQWDVVHUWVFDXVLQJ287WRFORVH7KLVVKRXOGRFFXUZKHQ
FXUUHQWDSSOLHGLVDSSUR[LPDWHO\$
1RWH
$V\RXSHUIRUPWKLVWHVWRWKHUSURWHFWLRQHOHPHQWVPD\DVVHUWFDXVLQJWKHUHOD\WR
FORVHRWKHURXWSXWFRQWDFWVDQGDVVHUWUHOD\WDUJHWV7KLVLVQRUPDODQGLVQRWDFDXVH
IRUFRQFHUQ
Negative-Sequence Directional Element
7KH6(/5HOD\LQFOXGHVDGLUHFWLRQDOHOHPHQWWKDWRSHUDWHVEDVHGXSRQWKHFDOFXODWHG
PDJQLWXGHDQGDQJOHRIQHJDWLYHVHTXHQFHLPSHGDQFHDSSOLHGWRWKHUHOD\7KHUHDUHWZR
PHWKRGVRIWHVWLQJWKHHOHPHQW7KHILUVWXVLQJDVLQJOHYROWDJHDQGFXUUHQWDQGWKHVHFRQG
XVLQJWKUHHYROWDJHVDQGRQHFXUUHQW([DPSOHVRIERWKPHWKRGVDUHSURYLGHGEHORZIROORZLQJ
DQH[SODQDWLRQRIWKHHTXDWLRQVZKLFKGHILQHWKHHOHPHQW
Negative-Sequence Directional Element Based Upon Negative-Sequence Impedance
7KH6(/5HOD\FDOFXODWHVWKHPDJQLWXGHDQGDQJOHRIQHJDWLYHVHTXHQFHYROWDJHDQG
FXUUHQWDSSOLHGWRWKHUHOD\)URPWKDWLQIRUPDWLRQWKHUHOD\FDOFXODWHVWKHPDJQLWXGHRI
QHJDWLYHVHTXHQFHLPSHGDQFHWKDWOLHVFROOLQHDUWRWKHOLQHSRVLWLYHVHTXHQFHLPSHGDQFH7KH
HTXDWLRQGHILQLQJWKDWIXQFWLRQLVVKRZQEHORZ
,
@
,
$1*
=
9
>
5H
F
=
¼
µ
¼
(TXDWLRQ
:KHUH 5HLQGLFDWHVWKHUHDOSDUWRIWKHWHUPLQEUDFNHWVIRULQVWDQFH5H>$M%@ $
LQGLFDWHVWKHFRPSOH[FRQMXJDWHRIWKHH[SUHVVLRQLQSDUHQWKHVHV$M%
$M%
7KHUHVXOWRI(TXDWLRQLVDQLPSHGDQFHPDJQLWXGHYDOXHWKDWYDULHVZLWKWKHPDJQLWXGHDQG
DQJOHRIDSSOLHGFXUUHQW$QH[DPSOHLOOXVWUDWHVWKLVRSHUDWLRQ
&RQVLGHUWKHUHVXOWRIDSSO\LQJWKHIROORZLQJYROWDJHDQGFXUUHQWVLJQDOVWR(TXDWLRQ
RQGDU\
VHF
$
,
RQGDU\
VHF
9
9
$1*
=
-
µ
=
µ
=
=
µ
Summary of Contents for SEL-321-5
Page 6: ......
Page 8: ......
Page 16: ......
Page 70: ...2 50 Specifications Date Code 20010215 SEL 321 5 Instruction Manual LJXUH RJLF 6 PERO HJHQG ...
Page 88: ...2 68 Specifications Date Code 20010215 SEL 321 5 Instruction Manual LJXUH 9ROWDJH OHPHQW RJLF ...
Page 106: ......
Page 152: ......
Page 158: ......
Page 252: ......
Page 253: ...SEL DIRECTION AND POLARITY CHECK FORM ...
Page 254: ......
Page 255: ...SEL DIRECTION AND POLARITY CHECK FORM ...
Page 256: ......
Page 260: ......
Page 318: ......
Page 322: ......
Page 326: ......
Page 328: ......
Page 330: ......
Page 334: ......
Page 336: ......
Page 338: ......
Page 344: ......