Schweitzer Engineering Laboratories SEL-321-2, Instruction Manual

Page: 185 / 354

Date Code 20010215 Applications 5-15
SEL-321-2 Instruction Manual
Voltage Elements
9ROWDJHHOHPHQWVDUHQRWUHTXLUHGIRUWKLVDSSOLFDWLRQ7KHYROWDJHHOHPHQWVDUHGLVDEOHGE\
VHWWLQJ(92/7 1
(92/7 1
5HOD\(OHPHQWVDQG2WKHU6HWWLQJV$IIHFWHG
5HOD\HOHPHQWV/33%351/DQG3
Time-Step Backup Time Delay Settings
7KHUHOD\SURYLGHVWLPHGHOD\HGSLFNXSWLPHUVIRUWLPHVWHSSHGEDFNXSSURWHFWLRQ6HSDUDWH
WLPHUVDUHSURYLGHGIRUWKH=RQHDQGSKDVHDQGJURXQGGLVWDQFHHOHPHQWV7LPHUVDUH
SURYLGHGIRUDOOIRXUOHYHOVRIWKHUHVLGXDODQGQHJDWLYHVHTXHQFHRYHUFXUUHQWHOHPHQWV7KH
UHVLGXDODQGQHJDWLYHVHTXHQFHRYHUFXUUHQWWLPHGHOD\VDUHLQGHSHQGHQWO\VHW
)RURXUH[DPSOHWKUHH]RQHVRISKDVHDQGJURXQGGLVWDQFHHOHPHQWVDUHVHOHFWHG,QWKLVFDVH
WKH=RQHDQGSKDVHDQGJURXQGGLVWDQFHWLPHGHOD\VPXVWEHVHW=RQHHOHPHQWVPXVW
FRRUGLQDWHZLWKGRZQVWUHDP=RQHHOHPHQWVSOXVGRZQVWUHDPEUHDNHURSHUDWLQJWLPHSOXVD
VDIHW\PDUJLQ$W\SLFDO=RQHSKDVHDQGJURXQGGLVWDQFHWLPHGHOD\VHWWLQJLVF\FOHV
7KH=RQHHOHPHQWLVUHYHUVHUHDFKLQJDQGLVQRWUHTXLUHGIRUEDFNXSSURWHFWLRQ7KH=RQH
HOHPHQWLVVHWIRUD]HURWLPHGHOD\DQGLVQRWVHWLQWKHWULSSLQJPDVN
)RUWKHUHOD\DW%UHDNHU
=3'
=3'
=*'
=*'
5HOD\(OHPHQWVDQG2WKHU6HWWLQJV$IIHFWHG
037037=*7DQG=*7HOHPHQWV
Permissive Overreaching Scheme Logic
)RURXUDSSOLFDWLRQWKHWULSSLQJVFKHPHLVSHUPLVVLYHRYHUUHDFKLQJWUDQVIHUWULS6HWWLQJ(3277
<HQDEOHVWKH3HUPLVVLYH2YHUUHDFKLQJ7UDQVIHU7ULSORJLFDQGVHWWLQJV:LWKWKHSHUPLVVLYH
WULSSLQJORJLFVHOHFWHGQRVHWWLQJVDUHUHTXLUHGIRUWKH'LUHFWLRQDO&RPSDULVRQ%ORFNLQJORJLF
7KH=RQH5HYHUVH%ORFN'HOD\=5%'WLPHUH[WHQGVWKHEORFNVLJQDOLVVXHGE\UHYHUVH
ORRNLQJHOHPHQWVDIWHUDFXUUHQWUHYHUVDORFFXUVDQG=RQHHOHPHQWVGURSRXW=RQHUHOD\
HOHPHQWVGRQRWHQFRPSDVVWKHRULJLQ7KHUHFRPPHQGHGWLPHVHWWLQJIRUWKH=5%'WLPHULV
WKHUHPRWHIDXOWHGWHUPLQDOEUHDNHUWLPHSOXVFRPPXQLFDWLRQVFKDQQHOUHVHWWLPHSOXVUHPRWH
=RQHUHOD\UHVHWWLPH$VVXPHDW\SLFDOEUHDNHURSHUDWLRQWLPHRIWKUHHF\FOHV
FRPPXQLFDWLRQVFKDQQHOUHVHWWLPHRIRQHF\FOHDQGUHPRWH=RQHUHOD\UHVHWWLPHRIRQHF\FOH
7KHVXPRIWKHVHWLPHVJLYHVDFRQVHUYDWLYH=5%'WLPHUVHWWLQJRIF\FOHV