4-30
Loss-of-Potential, Load Encroachment, and Directional Element Logic
Date Code 20010112
SEL-351S Instruction Manual
50QFP – Forward Directional Negative-Sequence Current Pickup
50QRP – Reverse Directional Negative-Sequence Current Pickup
6HWWLQJ5DQJH
$VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
$VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
7KH4)3VHWWLQJ,
FXUUHQWYDOXHLVWKHSLFNXSIRUWKHIRUZDUGIDXOWGHWHFWRU4)RIWKH
QHJDWLYHVHTXHQFHYROWDJHSRODUL]HGGLUHFWLRQDOHOHPHQWVVHH)LJXUH,GHDOO\WKHVHWWLQJLV
DERYHQRUPDOORDGXQEDODQFHDQGEHORZWKHORZHVWH[SHFWHGQHJDWLYHVHTXHQFHFXUUHQW
PDJQLWXGHIRUXQEDODQFHGIRUZDUGIDXOWV
7KH453VHWWLQJ,
FXUUHQWYDOXHLVWKHSLFNXSIRUWKHUHYHUVHIDXOWGHWHFWRU45RIWKH
QHJDWLYHVHTXHQFHYROWDJHSRODUL]HGGLUHFWLRQDOHOHPHQWVVHH)LJXUH,GHDOO\WKHVHWWLQJLV
DERYHQRUPDOORDGXQEDODQFHDQGEHORZWKHORZHVWH[SHFWHGQHJDWLYHVHTXHQFHFXUUHQW
PDJQLWXGHIRUXQEDODQFHGUHYHUVHIDXOWV
50QFP and 50QRP Set Automatically
,IHQDEOHVHWWLQJ( $872VHWWLQJV4)3DQG453DUHVHWDXWRPDWLFDOO\DW
4)3 $VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
453 $VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
4)3 $VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
453 $VHFRQGDU\$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
a2 – Positive-Sequence Current Restraint Factor, I
2
/I
1
6HWWLQJ5DQJH
XQLWOHVV
5HIHUWR)LJXUH
7KHDIDFWRULQFUHDVHVWKHVHFXULW\RIWKHQHJDWLYHVHTXHQFHYROWDJHSRODUL]HGGLUHFWLRQDO
HOHPHQWV,WNHHSVWKHHOHPHQWVIURPRSHUDWLQJIRUQHJDWLYHVHTXHQFHFXUUHQWV\VWHP
XQEDODQFHZKLFKFLUFXODWHVGXHWROLQHDV\PPHWULHV&7VDWXUDWLRQGXULQJWKUHHSKDVHIDXOWVHWF
a2 Set Automatically
,IHQDEOHVHWWLQJ( $872VHWWLQJDLVVHWDXWRPDWLFDOO\DW
D
)RUVHWWLQJD WKHQHJDWLYHVHTXHQFHFXUUHQW,
PDJQLWXGHKDVWREHJUHDWHUWKDQRI
WKHSRVLWLYHVHTXHQFHFXUUHQW,
PDJQLWXGHLQRUGHUIRUWKHQHJDWLYHVHTXHQFHYROWDJHSRODUL]HG
GLUHFWLRQDOHOHPHQWVWREHHQDEOHG
(
)
,
,
¼
>
Summary of Contents for SEL-351S
Page 10: ......
Page 12: ......
Page 32: ......
Page 132: ......
Page 170: ......
Page 174: ......
Page 192: ...5 18 Trip and Target Logic Date Code 20010112 SEL 351S Instruction Manual LJXUH 3277 RJLF ...
Page 197: ...Date Code 20010112 Trip and Target Logic 5 23 SEL 351S Instruction Manual LJXUH 8 RJLF ...
Page 248: ......
Page 330: ......
Page 378: ......
Page 406: ......
Page 486: ......
Page 528: ......
Page 538: ......
Page 546: ......
Page 552: ......
Page 554: ......
Page 568: ......
Page 576: ......
Page 584: ......
Page 618: ......
Page 626: ......