CA2054487A1 - Ptc element - Google Patents

Ptc element

Info

Publication number
CA2054487A1
CA2054487A1 CA2054487A CA2054487A CA2054487A1 CA 2054487 A1 CA2054487 A1 CA 2054487A1 CA 2054487 A CA2054487 A CA 2054487A CA 2054487 A CA2054487 A CA 2054487A CA 2054487 A1 CA2054487 A1 CA 2054487A1
Authority
CA
Canada
Prior art keywords
polymer composition
bodies
parallel
ptc element
pressure
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
CA2054487A
Other languages
French (fr)
Other versions
CA2054487C (en
Inventor
Tomas Hansson
Per-Olof Karlstrom
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.)
ABB AB
Original Assignee
Tomas Hansson
Per-Olof Karlstrom
Asea Brown Boveri Ab
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 SE9003448A external-priority patent/SE9003448L/en
Priority claimed from SE9003814A external-priority patent/SE467513B/en
Application filed by Tomas Hansson, Per-Olof Karlstrom, Asea Brown Boveri Ab filed Critical Tomas Hansson
Publication of CA2054487A1 publication Critical patent/CA2054487A1/en
Application granted granted Critical
Publication of CA2054487C publication Critical patent/CA2054487C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection

Abstract

PTC element comprises at least one body (10), provided with two parallel large surfaces, of an electrically conductive polymer composition with a positive temperature coefficient and two electrodes. At least one of the parallel surfaces on the body, or on one of the bodies, of polymer composition is adapted to make free contact with an electrode (11) or with a parallel surface of another body of electrically conductive polymer composition. A pressure device is provided to exert on the electrodes a pressure directed perpendicular to the parallel surfaces on the body, or bodies, of polymer composition. The pressure device is preferably provided with pressure-exerting devices (15, 16, 17, 17a, 17b) with the ability to be resilient. After changing from a low resistance to a high resistance state, the PTC element returns to the initial resistance state and is thus reusable after having been subjected to short-circuit currents. The parallel surfaces on the body, or the bodies, of polymer composition may be concentric.
CA002054487A 1990-10-30 1991-10-29 Ptc element Expired - Fee Related CA2054487C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9003448-9 1990-10-30
SE9003448A SE9003448L (en) 1990-10-30 1990-10-30 PTC element for overcurrent protection - has surface of body of polymer composition that makes free contact with each other or with associated electrode
SE9003814-2 1990-11-30
SE9003814A SE467513B (en) 1990-11-30 1990-11-30 PTC element

Publications (2)

Publication Number Publication Date
CA2054487A1 true CA2054487A1 (en) 1992-05-01
CA2054487C CA2054487C (en) 1998-02-17

Family

ID=26660895

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002054487A Expired - Fee Related CA2054487C (en) 1990-10-30 1991-10-29 Ptc element

Country Status (7)

Country Link
US (1) US5382938A (en)
EP (1) EP0487920B1 (en)
JP (1) JPH04266001A (en)
AT (1) ATE143169T1 (en)
CA (1) CA2054487C (en)
DE (1) DE69122216T2 (en)
ES (1) ES2094180T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6215388B1 (en) 1996-09-27 2001-04-10 Therm-Q-Disc, Incorporated Parallel connected PTC elements

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US5933311A (en) * 1998-04-02 1999-08-03 Square D Company Circuit breaker including positive temperature coefficient resistivity elements having a reduced tolerance
JP2001504983A (en) * 1997-08-25 2001-04-10 スクウエアー ディー カンパニー Current limiting circuit breaker with PTC (positive temperature coefficient resistivity) element and arc extinguishing ability
US5886860A (en) * 1997-08-25 1999-03-23 Square D Company Circuit breakers with PTC (Positive Temperature Coefficient resistivity
IL121703A0 (en) * 1997-09-03 1998-02-22 Body Heat Ltd Fabrication of PTC heating devices
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US6373372B1 (en) 1997-11-24 2002-04-16 General Electric Company Current limiting device with conductive composite material and method of manufacturing the conductive composite material and the current limiting device
US6128168A (en) 1998-01-14 2000-10-03 General Electric Company Circuit breaker with improved arc interruption function
US6282072B1 (en) 1998-02-24 2001-08-28 Littelfuse, Inc. Electrical devices having a polymer PTC array
US6020802A (en) * 1998-04-02 2000-02-01 Square D Company Circuit breaker including two magnetic coils and a positive temperature coefficient resistivity element
US6606023B2 (en) 1998-04-14 2003-08-12 Tyco Electronics Corporation Electrical devices
US6290879B1 (en) 1998-05-20 2001-09-18 General Electric Company Current limiting device and materials for a current limiting device
US6124780A (en) * 1998-05-20 2000-09-26 General Electric Company Current limiting device and materials for a current limiting device
US6133820A (en) * 1998-08-12 2000-10-17 General Electric Company Current limiting device having a web structure
DE19842008A1 (en) * 1998-09-15 2000-03-16 Moeller Gmbh Contact structure, for PTC type conductive polymers used in electrical switching and protection devices, comprises coated copper contact electrodes heat treated to achieve low elasticity modulus
DE19842006A1 (en) * 1998-09-15 2000-03-16 Moeller Gmbh Contact structure, for PTC type conductive polymers used in electrical switching and protection devices, comprises a polymer sheet sandwiched between highly flexible metal contact electrodes
US6582647B1 (en) 1998-10-01 2003-06-24 Littelfuse, Inc. Method for heat treating PTC devices
US5963121A (en) * 1998-11-11 1999-10-05 Ferro Corporation Resettable fuse
US6157528A (en) 1999-01-28 2000-12-05 X2Y Attenuators, L.L.C. Polymer fuse and filter apparatus
US6144540A (en) * 1999-03-09 2000-11-07 General Electric Company Current suppressing circuit breaker unit for inductive motor protection
US6157286A (en) * 1999-04-05 2000-12-05 General Electric Company High voltage current limiting device
US6640420B1 (en) * 1999-09-14 2003-11-04 Tyco Electronics Corporation Process for manufacturing a composite polymeric circuit protection device
US6854176B2 (en) * 1999-09-14 2005-02-15 Tyco Electronics Corporation Process for manufacturing a composite polymeric circuit protection device
US6323751B1 (en) 1999-11-19 2001-11-27 General Electric Company Current limiter device with an electrically conductive composite material and method of manufacturing
US6429533B1 (en) * 1999-11-23 2002-08-06 Bourns Inc. Conductive polymer device and method of manufacturing same
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US6388553B1 (en) 2000-03-02 2002-05-14 Eaton Corproation Conductive polymer current-limiting fuse
US6628498B2 (en) 2000-08-28 2003-09-30 Steven J. Whitney Integrated electrostatic discharge and overcurrent device
US7193831B2 (en) * 2000-10-17 2007-03-20 X2Y Attenuators, Llc Energy pathway arrangement
WO2002033798A1 (en) * 2000-10-17 2002-04-25 X2Y Attenuators, Llc Amalgam of shielding and shielded energy pathways and other elements for single or multiple circuitries with common reference node
US6411191B1 (en) 2000-10-24 2002-06-25 Eaton Corporation Current-limiting device employing a non-uniform pressure distribution between one or more electrodes and a current-limiting material
EP1213728A3 (en) * 2000-11-27 2005-10-26 Eaton Corporation Current-limiting device
DE60134493D1 (en) * 2000-12-12 2008-07-31 Japan Science & Tech Agency STEERING MECHANISM FOR ELECTRIC VEHICLE
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JP5228211B2 (en) * 2003-07-02 2013-07-03 タイコエレクトロニクスジャパン合同会社 Composite PTC element
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6215388B1 (en) 1996-09-27 2001-04-10 Therm-Q-Disc, Incorporated Parallel connected PTC elements

Also Published As

Publication number Publication date
DE69122216T2 (en) 1997-04-30
EP0487920B1 (en) 1996-09-18
EP0487920A1 (en) 1992-06-03
US5382938A (en) 1995-01-17
DE69122216D1 (en) 1996-10-24
CA2054487C (en) 1998-02-17
ATE143169T1 (en) 1996-10-15
JPH04266001A (en) 1992-09-22
ES2094180T3 (en) 1997-01-16

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