Schweitzer Engineering Laboratories SEL-351S - Convert “Equivalent” Phase Overcurrent Element Settings to Negative-Sequence€Overcurrent Element Settings (Guideline 4)

Date Code 20010112 Setting Negative-Sequence Overcurrent Elements F-5
SEL-351S Instruction Manual

)LJXUH)3KDVHWR3KDVH)DXOW&RRUGLQDWLRQ
(3SLFNXS $EHORZPD[IHHGHUORDG,
)

&RQVLGHUDEOHLPSURYHPHQWLQVHQVLWLYLW\DQGVSHHGRIRSHUDWLRQIRUSKDVHWRSKDVHIDXOWVLV
DFKLHYHGZLWKWKH(3HOHPHQW7KH(3HOHPHQWSLFNXSRI$KDVWZLFHWKHVHQVLWLYLW\RI
WKH)HOHPHQWSLFNXSRI$7KH(3HOHPHQWVSHHGRIRSHUDWLRQIRUSKDVHWRSKDVHIDXOWV
EHORZDERXW$LVIDVWHUWKDQWKDWIRUWKH)HOHPHQW
Convert “Equivalent” Phase Overcurrent Element Settings to Negative-
Sequence Overcurrent Element Settings (Guideline 4)
7KH³HTXLYDOHQW´SKDVHRYHUFXUUHQWHOHPHQW(3HOHPHQWLQ)LJXUH)FRQYHUWVWRWUXH
QHJDWLYHVHTXHQFHRYHUFXUUHQWHOHPHQWVHWWLQJV4)LQ)LJXUH)E\DSSO\LQJWKHHTXDWLRQ
JLYHQLQ*XLGHOLQH7KHWLPHGLDOOHYHUDQGFXUYHW\SHRIWKHHOHPHQWUHPDLQWKHVDPHLIWKH
HOHPHQWLVDGHILQLWHWLPHHOHPHQWWKHWLPHGHOD\UHPDLQVWKHVDPH