Sel SEL-351A - FREQUENCY ELEMENTS

Date Code 20010307 Overcurrent, Voltage, Synchronism Check, and Frequency Elements 3-45
SEL-351A Instruction Manual
Synchronism Check Applications for Automatic Reclosing and Manual Closing
5HIHUWR&ORVH/RJLFDQG5HFORVH6XSHUYLVLRQ/RJLFLQ6HFWLRQ&ORVHDQG5HFORVH/RJLF
)RUH[DPSOHVHW$1* GHJUHHVDQGXVHWKHUHVXOWDQWV\QFKURQLVPFKHFNHOHPHQWLQWKH
UHFORVLQJUHOD\ORJLFWRVXSHUYLVHDXWRPDWLFUHFORVLQJ
HJ&/6 $ VHH)LJXUH
6HW$1* DQGXVHWKHUHVXOWDQWV\QFKURQLVPFKHFNHOHPHQWLQPDQXDOFORVHORJLFWR
VXSHUYLVHPDQXDOFORVLQJIRUH[DPSOHDVVHUW,1WRLQLWLDWHPDQXDOFORVH
HJ&/ ,1$ VHH)LJXUH
,QWKLVH[DPSOHWKHDQJXODUGLIIHUHQFHDFURVVWKHFLUFXLWEUHDNHUFDQEHJUHDWHUIRUDPDQXDOFORVH
GHJUHHVWKDQIRUDQDXWRPDWLFUHFORVHGHJUHHV
$VLQJOHRXWSXWFRQWDFWHJ287 &/26(FDQSURYLGHWKHFORVHIXQFWLRQIRUERWK
DXWRPDWLFUHFORVLQJDQGPDQXDOFORVLQJVHH)LJXUHORJLFRXWSXW
FREQUENCY ELEMENTS
6L[IUHTXHQF\HOHPHQWVDUHDYDLODEOH(QDEOHWKHGHVLUHGQXPEHURIIUHTXHQF\HOHPHQWVZLWKWKH
(HQDEOHVHWWLQJ
 ( 1QRQHWKURXJK
DVVKRZQLQ)LJXUH)UHTXHQF\LVGHWHUPLQHGIURPWKHYROWDJHFRQQHFWHGWRYROWDJH
WHUPLQDOV9$1
Frequency Element Settings

)LJXUH8QGHUYROWDJH%ORFNIRU)UHTXHQF\(OHPHQWV