ES475710A1 - Method of and apparatus for detecting corona - Google Patents

Method of and apparatus for detecting corona

Info

Publication number
ES475710A1
ES475710A1 ES475710A ES475710A ES475710A1 ES 475710 A1 ES475710 A1 ES 475710A1 ES 475710 A ES475710 A ES 475710A ES 475710 A ES475710 A ES 475710A ES 475710 A1 ES475710 A1 ES 475710A1
Authority
ES
Spain
Prior art keywords
waveguides
electrical discharge
khz
detector
winding
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.)
Expired
Application number
ES475710A
Other languages
Spanish (es)
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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
Priority claimed from US05/858,034 external-priority patent/US4158168A/en
Priority claimed from US05/858,054 external-priority patent/US4158169A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of ES475710A1 publication Critical patent/ES475710A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/404—Protective devices specially adapted for fluid filled transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Testing Relating To Insulation (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Protection Of Transformers (AREA)
  • Elimination Of Static Electricity (AREA)
  • Electrostatic Separation (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

The electrical discharge detection and location system uses acoustic waveguides. The waveguides (44) are designed to be fitted into the housing (22) of the inductive winding. The sound waves picked up from an electrical discharge source in the winding are transmitted to a remote point containing detectors. The detectors (36) produce an electrical signal representative of the electrical discharge. The waveguides have a longitudinal axis having a first end in proximity to the inductive winding. A second end is acoustically coupled to the detector (36). The detector (36) includes a piezoceramic element (94) which can respond to a single frequency e.g. 80 kHz or a wide range of frequencies e.g. 1 kHz-10 MHz.
ES475710A 1977-12-06 1978-12-05 Method of and apparatus for detecting corona Expired ES475710A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/858,034 US4158168A (en) 1977-12-06 1977-12-06 Acoustic waveguides for sensing and locating corona discharges
US05/858,054 US4158169A (en) 1977-12-06 1977-12-06 Corona testing apparatus including acoustic waveguides for transmitting acoustic emissions from electrical apparatus

Publications (1)

Publication Number Publication Date
ES475710A1 true ES475710A1 (en) 1980-03-01

Family

ID=27127438

Family Applications (1)

Application Number Title Priority Date Filing Date
ES475710A Expired ES475710A1 (en) 1977-12-06 1978-12-05 Method of and apparatus for detecting corona

Country Status (6)

Country Link
JP (1) JPS5857056B2 (en)
KR (1) KR820001828B1 (en)
BE (1) BE872510A (en)
ES (1) ES475710A1 (en)
FR (1) FR2402877A1 (en)
NO (1) NO158157C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038458U (en) * 1983-08-24 1985-03-16 三菱電機株式会社 circuit break
JPS6039550U (en) * 1983-08-25 1985-03-19 三菱電機株式会社 circuit break
JPS60107232A (en) * 1983-11-15 1985-06-12 三菱電機株式会社 Circuit breaker
JPS60119052A (en) * 1983-11-30 1985-06-26 三菱電機株式会社 Auxiliary contact unit for circuit switching unit
JPH0142923Y2 (en) * 1984-09-25 1989-12-14
JPS6175047U (en) * 1984-10-23 1986-05-21
JPS6237865U (en) * 1985-08-27 1987-03-06
JPH0430757Y2 (en) * 1987-03-28 1992-07-24
NL1005721C2 (en) 1997-04-03 1998-10-07 Kema Nv Method and device for detecting partial discharges.
FR2786274B1 (en) 1998-11-25 2000-12-29 Alstom Technology METHOD AND DEVICE FOR DETECTION OF AN INTERNAL ARC IN AN ELECTRICAL LINK IN A METAL ENCLOSURE
JP2012154753A (en) * 2011-01-26 2012-08-16 Mitsubishi Electric Corp Discharge generation position estimation device and stationary induction device with the discharge generation position estimation device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402544A (en) * 1943-03-15 1946-06-25 Pacific Electric Mfg Corp High voltage current indicating and insulating means
US3331023A (en) * 1964-03-09 1967-07-11 Sigma Instruments Inc Sensing and measuring device for high voltage power lines
JPS4317445Y1 (en) * 1966-04-04 1968-07-19
US3597683A (en) * 1970-04-24 1971-08-03 Shigebumi Saito Current transformer utilizing an electromagnetic wave, a faraday rotator, circular waveguides, horn antennae, and mode converters to measure current in a high voltage transmission line
CA933646A (en) * 1970-06-16 1973-09-11 Canadian General Electric Company Limited Ultrasonic leak detection
US3728619A (en) * 1971-06-21 1973-04-17 Westinghouse Electric Corp Acoustical corona locator having rotatable and pivotable transducers
US3777189A (en) * 1972-05-04 1973-12-04 Westinghouse Electric Corp Acoustic energy transmission device
US3936348A (en) * 1973-02-05 1976-02-03 Wesley M. Rohrer Method and apparatus for detection of nuclear fuel rod failures

Also Published As

Publication number Publication date
FR2402877B1 (en) 1984-03-02
BE872510A (en) 1979-06-05
NO784052L (en) 1979-06-07
FR2402877A1 (en) 1979-04-06
NO158157B (en) 1988-04-11
JPS5490545A (en) 1979-07-18
NO158157C (en) 1988-07-20
JPS5857056B2 (en) 1983-12-17
KR820001828B1 (en) 1982-10-12

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971201