Schweitzer Engineering Laboratories SEL-351S - Residual Ground Instantaneous;Definite-Time Overcurrent Elements; Settings Ranges; Accuracy; Pickup and Reset Time Curves

3-12 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20010112
SEL-351S Instruction Manual
Residual Ground Instantaneous/Definite-Time Overcurrent Elements
)RXUOHYHOVRIUHVLGXDOJURXQGLQVWDQWDQHRXVGHILQLWHWLPHRYHUFXUUHQWHOHPHQWVDUHDYDLODEOH
7ZRDGGLWLRQDOOHYHOVRIUHVLGXDOJURXQGLQVWDQWDQHRXVRYHUFXUUHQWHOHPHQWV/HYHOVDQGDUH
DOVRDYDLODEOH7KHGLIIHUHQWOHYHOVDUHHQDEOHGZLWKWKH(*HQDEOHVHWWLQJDVVKRZQLQ
)LJXUHDQG)LJXUH
/HYHOHOHPHQW*6LQ)LJXUHLVXVHGLQGLUHFWLRQDOFRPSDULVRQEORFNLQJVFKHPHVVHH
'LUHFWLRQDO&RPSDULVRQ%ORFNLQJ'&%/RJLFLQ6HFWLRQ7ULSDQG7DUJHW/RJLF$OOWKH
RWKHUUHVLGXDOJURXQGLQVWDQWDQHRXVGHILQLWHWLPHRYHUFXUUHQWHOHPHQWVDUHDYDLODEOHIRUXVHLQ
DQ\WULSSLQJRUFRQWUROVFKHPH
7RXQGHUVWDQGWKHRSHUDWLRQRI)LJXUHDQG)LJXUHIROORZWKHH[SODQDWLRQJLYHQIRU
)LJXUH)LJXUHDQG)LJXUHLQWKHSUHFHGLQJ3KDVH,QVWDQWDQHRXV'HILQLWH7LPH
2YHUFXUUHQW(OHPHQWVVXEVHFWLRQVXEVWLWXWLQJUHVLGXDOJURXQGFXUUHQW,
*
,
*
 ,

 ,
$
,
%
,
&

IRUSKDVHFXUUHQWVDQGVXEVWLWXWLQJOLNHVHWWLQJVDQG5HOD\:RUGELWV
Settings Ranges
6HWWLQJUDQJHIRUSLFNXSVHWWLQJV*3WKURXJK*3
$VHFRQGDU\ $QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
$VHFRQGDU\ $QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
6HWWLQJUDQJHIRUGHILQLWHWLPHVHWWLQJV*'WKURXJK*'
F\FOHVLQF\FOHVWHSV
6HWWLQJUDQJHIRUGHILQLWHWLPHVHWWLQJ*6'XVHGLQ'&%ORJLF
F\FOHVLQF\FOHVWHSV
Accuracy
3LFNXS $VHFRQGDU\DQGRIVHWWLQJ$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
$VHFRQGDU\DQGRIVHWWLQJ$QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
7LPHU F\FOHVDQGRIVHWWLQJ
7UDQVLHQW2YHUUHDFK RIVHWWLQJ
Pickup and Reset Time Curves
6HH)LJXUHDQG)LJXUH