Date Code 20010112
Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements
3-33
SEL-351S Instruction Manual
)LJXUH&KDQQHO969ROWDJH(OHPHQWV
Accuracy
3LFNXS
9DQG
RIVHWWLQJ
7UDQVLHQW2YHUUHDFK
RIVHWWLQJ
Voltage Element Operation
1RWHWKDWWKHYROWDJHHOHPHQWVLQ7DEOHDQG)LJXUHWKURXJK)LJXUHDUHD
FRPELQDWLRQRI³XQGHUYROWDJH´'HYLFHDQG³RYHUYROWDJH´'HYLFHW\SHHOHPHQWV
8QGHUYROWDJHHOHPHQWV'HYLFHDVVHUWZKHQWKHRSHUDWLQJYROWDJHJRHVEHORZWKHFRUUH
VSRQGLQJSLFNXSVHWWLQJ2YHUYROWDJHHOHPHQWV'HYLFHDVVHUWZKHQWKHRSHUDWLQJYROWDJH
JRHVDERYHWKHFRUUHVSRQGLQJSLFNXSVHWWLQJ
Undervoltage Element Operation Example
5HIHUWR)LJXUHWRSRIWKHILJXUH
3LFNXSVHWWLQJ33LVFRPSDUHGWRWKHPDJQLWXGHVRIWKHLQGLYLGXDOSKDVHYROWDJHV9
$
9
%
DQG
9
&
7KHORJLFRXWSXWVLQ)LJXUHDUHWKHIROORZLQJ5HOD\:RUGELWV
$ ORJLFDOLI9
$
SLFNXSVHWWLQJ33
ORJLFDOLI9
$
SLFNXSVHWWLQJ33
% ORJLFDOLI9
%
SLFNXSVHWWLQJ33
ORJLFDOLI9
%
SLFNXSVHWWLQJ33
& ORJLFDOLI9
&
SLFNXSVHWWLQJ33
ORJLFDOLI9
&
SLFNXSVHWWLQJ33
3 ORJLFDOLIDOOWKUHH5HOD\:RUGELWV$%DQG&DUHDVVHUWHG
$ % DQG&
ORJLFDOLIDWOHDVWRQHRIWKH5HOD\:RUGELWV$%RU&LV
GHDVVHUWHGHJ$
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: ......