Schweitzer Engineering Laboratories SEL-351S - SECTION 3: OVERCURRENT, VOLTAGE, SYNCHRONISM CHECK, FREQUENCY, AND POWER ELEMENTS; INSTANTANEOUS;DEFINITE-TIME OVERCURRENT ELEMENTS

Date Code 20010112 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements 3-1
SEL-351S Instruction Manual
SECTION 3: OVERCURRENT, VOLTAGE, SYNCHRONISM
CHECK, FREQUENCY, AND POWER ELEMENTS
INSTANTANEOUS/DEFINITE-TIME OVERCURRENT ELEMENTS
Phase Instantaneous/Definite-Time Overcurrent Elements
)RXUOHYHOVRISKDVHLQVWDQWDQHRXVGHILQLWHWLPHRYHUFXUUHQWHOHPHQWVDUHDYDLODEOH7ZRDGGL
WLRQDOOHYHOVRISKDVHLQVWDQWDQHRXVRYHUFXUUHQWHOHPHQWV/HYHOVDQGDUHDOVRDYDLODEOH7KH
GLIIHUHQWOHYHOVDUHHQDEOHGZLWKWKH(3HQDEOHVHWWLQJDVVKRZQLQ)LJXUH)LJXUHDQG
)LJXUH
/HYHOHOHPHQW36LQ)LJXUHLVXVHGLQGLUHFWLRQDOFRPSDULVRQEORFNLQJVFKHPHVVHH
'LUHFWLRQDO&RPSDULVRQ%ORFNLQJ'&%/RJLFLQ6HFWLRQ7ULSDQG7DUJHW/RJLF$OOWKH
RWKHUSKDVHLQVWDQWDQHRXVGHILQLWHWLPHRYHUFXUUHQWHOHPHQWVDUHDYDLODEOHIRUXVHLQDQ\WULSSLQJ
RUFRQWUROVFKHPH
Settings Ranges
6HWWLQJUDQJHIRUSLFNXSVHWWLQJV33WKURXJK33
$VHFRQGDU\ $QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
$VHFRQGDU\ $QRPLQDOSKDVHFXUUHQWLQSXWV,$,%,&
6HWWLQJUDQJHIRUGHILQLWHWLPHVHWWLQJV3'WKURXJK3'
F\FOHVLQF\FOHVWHSV
6HWWLQJUDQJHIRUGHILQLWHWLPHVHWWLQJ36'XVHGLQWKH'&%ORJLF
F\FOHVLQF\FOHVWHSV
Accuracy
3LFNXS $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