G-2
Setting SEL
OGIC
®
Control Equations
Date Code 20010307
SEL-351-0, -1, -2, -3, -4 Instruction Manual
,IWKHPD[LPXPSKDVHFXUUHQWLVDERYHWKHOHYHORIWKHSKDVHWLPHRYHUFXUUHQWSLFNXSVHWWLQJ
33SKDVHWLPHRYHUFXUUHQWHOHPHQW37LVHLWKHUWLPLQJRQLWVFXUYHRULVDOUHDG\WLPHGRXW
Phase Time-Overcurrent Element 51PT Time-Out Indication
,ISKDVHWLPHRYHUFXUUHQWHOHPHQW37LVQRWWLPHGRXWRQLWVFXUYH5HOD\:RUGELW37LVLQ
WKHIROORZLQJVWDWH
37
ORJLFDO
,ISKDVHWLPHRYHUFXUUHQWHOHPHQW37LVWLPHGRXWRQLWVFXUYH5HOD\:RUGELW37LVLQWKH
IROORZLQJVWDWH
37
ORJLFDO
Phase Time-Overcurrent Element 51PT Reset Indication
,ISKDVHWLPHRYHUFXUUHQWHOHPHQW37LVQRWIXOO\UHVHW5HOD\:RUGELW35LVLQWKH
IROORZLQJVWDWH
35
ORJLFDO
,ISKDVHWLPHRYHUFXUUHQWHOHPHQWLVIXOO\UHVHW5HOD\:RUGELW35LVLQWKHIROORZLQJVWDWH
35
ORJLFDO
,ISKDVHWLPHRYHUFXUUHQWHOHPHQW37LVQRWIXOO\UHVHWWKHHOHPHQWLVHLWKHU
7LPLQJRQLWVFXUYH
$OUHDG\WLPHGRXW
,VWLPLQJWRUHVHWRQHF\FOHUHVHWRUHOHFWURPHFKDQLFDOHPXODWLRQ²VHH
VHWWLQJ356
Relay Word Bit Application Examples—Phase Time-Overcurrent Element 51PT
&RPPRQXVHVIRU5HOD\:RUGELWV337DQG35
3
WHVWLQJHJDVVLJQWRDQRXWSXWFRQWDFWIRUSLFNXSWHVWLQJ
WULSXQODWFKORJLFVHH6(/
2*,&
FRQWUROHTXDWLRQXQODWFKWULSVHWWLQJ8/75H[DPSOH
ODWHULQWKLVVHFWLRQ
37 WULSORJLFVHH6(/
2*,&
FRQWUROHTXDWLRQWULSVHWWLQJ75H[DPSOHODWHULQWKLV
VHFWLRQ
35 XVHGLQWHVWLQJHJDVVLJQWRDQRXWSXWFRQWDFWIRUUHVHWLQGLFDWLRQ
Other Relay Word Bits
7KHSUHFHGLQJH[DPSOHZDVIRUDSKDVHWLPHRYHUFXUUHQWHOHPHQWGHPRQVWUDWLQJ5HOD\:RUGELW
RSHUDWLRQIRUSLFNXSWLPHRXWDQGUHVHWFRQGLWLRQV2WKHU5HOD\:RUGELWVHJWKRVHIRU
GHILQLWHWLPHRYHUFXUUHQWHOHPHQWVYROWDJHHOHPHQWVIUHTXHQF\HOHPHQWVEHKDYHVLPLODUO\LQ
WKHLUDVVHUWLRQRUGHDVVHUWLRQWRORJLFDORUORJLFDOUHVSHFWLYHO\7KHWLPHRYHUFXUUHQW
HOHPHQWVOLNHWKHSUHFHGLQJSKDVHWLPHRYHUFXUUHQWHOHPHQWH[DPSOHDUHUDWKHUXQLTXHEHFDXVH
WKH\KDYHD5HOD\:RUGELWHJ35WKDWDVVHUWVIRUWKHUHVHWVWDWHRIWKHHOHPHQW