JPS54147446A - Protective device for higher harmonic filter - Google Patents

Protective device for higher harmonic filter

Info

Publication number
JPS54147446A
JPS54147446A JP5594578A JP5594578A JPS54147446A JP S54147446 A JPS54147446 A JP S54147446A JP 5594578 A JP5594578 A JP 5594578A JP 5594578 A JP5594578 A JP 5594578A JP S54147446 A JPS54147446 A JP S54147446A
Authority
JP
Japan
Prior art keywords
filters
signals
auxiliary
frequency band
bus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5594578A
Other languages
Japanese (ja)
Other versions
JPS6048973B2 (en
Inventor
Kenichi Akiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5594578A priority Critical patent/JPS6048973B2/en
Publication of JPS54147446A publication Critical patent/JPS54147446A/en
Publication of JPS6048973B2 publication Critical patent/JPS6048973B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Filters And Equalizers (AREA)

Abstract

PURPOSE: To enable one to detect any small trouble and to protect the device exactly by comparing two signals, which are detected from currents flowing in the main circuit and auxiliary filters and are proportional to currents in the resonance frequency band of the respective filters, with each other.
CONSTITUTION: The auxiliary filters 8a to 10a of low voltage, which are designed such that these are corresponding to the main circuit filters 8 to 10 respectively and resonant in the same degrees, are connected to the main filter bus 7 through the auxiliary transformer 14 and auxiiary bus 15. Also the currents flowing in the respective filters, for example, 8 and 8a, are fed to the regulatable output devices 20, 20a, which convert the secondary current into an arbitrary output signal and regulate it, through the current transformers 19, 19a. Only signals of the n-th degree frequency band by which both filters resonate are taken in the band-pass filter 21, the fetched signals are compared with each other, and the protective relay 22 is operated to open the breaker 6 when the difference between both signals is over the setting range. By this way, and small trouble can be exactly detected.
COPYRIGHT: (C)1979,JPO&Japio
JP5594578A 1978-05-11 1978-05-11 Harmonic filter protection device Expired JPS6048973B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5594578A JPS6048973B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5594578A JPS6048973B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Publications (2)

Publication Number Publication Date
JPS54147446A true JPS54147446A (en) 1979-11-17
JPS6048973B2 JPS6048973B2 (en) 1985-10-30

Family

ID=13013205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5594578A Expired JPS6048973B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Country Status (1)

Country Link
JP (1) JPS6048973B2 (en)

Also Published As

Publication number Publication date
JPS6048973B2 (en) 1985-10-30

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