JPS54147448A - Protective device for higher harmonic filter - Google Patents

Protective device for higher harmonic filter

Info

Publication number
JPS54147448A
JPS54147448A JP5594778A JP5594778A JPS54147448A JP S54147448 A JPS54147448 A JP S54147448A JP 5594778 A JP5594778 A JP 5594778A JP 5594778 A JP5594778 A JP 5594778A JP S54147448 A JPS54147448 A JP S54147448A
Authority
JP
Japan
Prior art keywords
harmonic
filter
detected
harmonic filter
band
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
JP5594778A
Other languages
Japanese (ja)
Other versions
JPS6048975B2 (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 JP5594778A priority Critical patent/JPS6048975B2/en
Publication of JPS54147448A publication Critical patent/JPS54147448A/en
Publication of JPS6048975B2 publication Critical patent/JPS6048975B2/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 an abnormal resonance with another system device and to protect the device exactly by comparing two signals, which are detected from currents flowing in the harmonic source and filter circuit and are proportional to currents in the resonance frequency band of the respective filters, with each other.
CONSTITUTION: The harmonic filter 10 consists of the resistance 7, reactor 8 and capacitor 9, the instrument transformer 11 which detects a load current containing a harmonic, instrument transformer 12 which detects a current flowing in the harmonic filter 10 are arranged, the band-pass filters 13, 14 which pass only harmonic companents through are connected to the respective transformers 11, 12. The harmonic components passes through both the band-pass filters 13, 14 are compared with each other, the protective relay 15 is operated to open the breaker 6 when the difference between both components is over the setting value. By this way, any smaller trouble can be detected early and exactly, an abnormal resonance of harmonic filter with other systen instruments can be detected too.
COPYRIGHT: (C)1979,JPO&Japio
JP5594778A 1978-05-11 1978-05-11 Harmonic filter protection device Expired JPS6048975B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5594778A JPS6048975B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5594778A JPS6048975B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Publications (2)

Publication Number Publication Date
JPS54147448A true JPS54147448A (en) 1979-11-17
JPS6048975B2 JPS6048975B2 (en) 1985-10-30

Family

ID=13013262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5594778A Expired JPS6048975B2 (en) 1978-05-11 1978-05-11 Harmonic filter protection device

Country Status (1)

Country Link
JP (1) JPS6048975B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024138U (en) * 1983-07-19 1985-02-19 株式会社明電舎 Abnormality detection device in harmonic suppression equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024138U (en) * 1983-07-19 1985-02-19 株式会社明電舎 Abnormality detection device in harmonic suppression equipment

Also Published As

Publication number Publication date
JPS6048975B2 (en) 1985-10-30

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