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GB1123200A - Detection of faults in electrical induction furnaces - Google Patents

Detection of faults in electrical induction furnaces

Info

Publication number
GB1123200A
GB1123200A GB53172/65A GB5317265A GB1123200A GB 1123200 A GB1123200 A GB 1123200A GB 53172/65 A GB53172/65 A GB 53172/65A GB 5317265 A GB5317265 A GB 5317265A GB 1123200 A GB1123200 A GB 1123200A
Authority
GB
United Kingdom
Prior art keywords
coil
cover
relay
turns
indicator
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
GB53172/65A
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.)
ALLMAENNA SVENSKA ELECTRISKA A
Original Assignee
ALLMAENNA SVENSKA ELECTRISKA A
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 ALLMAENNA SVENSKA ELECTRISKA A filed Critical ALLMAENNA SVENSKA ELECTRISKA A
Publication of GB1123200A publication Critical patent/GB1123200A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H05B6/24—Crucible furnaces
    • H05B6/28—Protective systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)

Abstract

1,123,200. Protective arrangements. ALLMANNA SVENSKA ELEKTRISKA A.B. 15 Dec., 1965 [16 Dec., 1964], No. 53172/65. Heading H2K. To protect against short circuits between the turns 12 . . . 15 of a coil of an induction furnace 11, the coil turns are wholly or partly surrounded by a conducting sheath or cover 17 which is insulated from the coil between its ends. At one end the sheath or cover is directly connected by 18 to the corresponding end of the coil and at the other end is connected through a relay 20 and/or a fault indicator 19 to the other end of the coil. Normally there is substantially no potential across the relay and/or the indicator, but when a fault occurs, short circuiting of turns of the cover results in unbalance between the voltages across the coil and cover and the relay and/or indicator are energized.
GB53172/65A 1964-12-16 1965-12-15 Detection of faults in electrical induction furnaces Expired GB1123200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15196/64A SE313129B (en) 1964-12-16 1964-12-16

Publications (1)

Publication Number Publication Date
GB1123200A true GB1123200A (en) 1968-08-14

Family

ID=20300294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53172/65A Expired GB1123200A (en) 1964-12-16 1965-12-15 Detection of faults in electrical induction furnaces

Country Status (5)

Country Link
US (1) US3414660A (en)
DE (1) DE1565284B2 (en)
FR (1) FR1469037A (en)
GB (1) GB1123200A (en)
SE (1) SE313129B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780250A (en) * 1971-11-02 1973-12-18 Chisso Corp Apparatus for heating the surface of constructions
SE372870B (en) * 1973-05-18 1975-01-13 Asea Ab
US4486641A (en) * 1981-12-21 1984-12-04 Ruffini Robert S Inductor, coating and method
US5418811A (en) * 1992-04-08 1995-05-23 Fluxtrol Manufacturing, Inc. High performance induction melting coil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801791A (en) * 1930-03-05 1931-04-21 Westinghouse Electric & Mfg Co Induction-furnace protective circuits
US2614200A (en) * 1950-08-11 1952-10-14 Western Electric Co Leak detector for immersion heaters
US2990542A (en) * 1958-04-11 1961-06-27 Ajax Magnethermic Corp Protective device for induction furnaces
US3185894A (en) * 1960-08-17 1965-05-25 Asea Ab Means for indicating faults in the crucible of induction melting furnaces
GB1031932A (en) * 1962-04-09 1966-06-02 Asea Ab A protective device for a super-conductor

Also Published As

Publication number Publication date
FR1469037A (en) 1967-02-10
DE1565284B2 (en) 1971-10-07
US3414660A (en) 1968-12-03
DE1565284A1 (en) 1970-01-15
SE313129B (en) 1969-08-04

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