ES2005836A6 - Device and method of protecting circuits against changes in operating conditions. - Google Patents

Device and method of protecting circuits against changes in operating conditions.

Info

Publication number
ES2005836A6
ES2005836A6 ES8602881A ES8602881A ES2005836A6 ES 2005836 A6 ES2005836 A6 ES 2005836A6 ES 8602881 A ES8602881 A ES 8602881A ES 8602881 A ES8602881 A ES 8602881A ES 2005836 A6 ES2005836 A6 ES 2005836A6
Authority
ES
Spain
Prior art keywords
ptc
solder joint
operating conditions
ptc device
against changes
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
ES8602881A
Other languages
Spanish (es)
Inventor
Peter D Thompson
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.)
Elmwood Sensors Ltd
Elmwood Sensors Inc
Original Assignee
Elmwood Sensors Ltd
Elmwood Sensors Inc
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 Elmwood Sensors Ltd, Elmwood Sensors Inc filed Critical Elmwood Sensors Ltd
Publication of ES2005836A6 publication Critical patent/ES2005836A6/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Fuses (AREA)

Abstract

A device for protecting against excess current comprises a positive temperature coefficient (PTC) device and a tension spring connected by a solder joint adjacent the PTC device. Electrical current passes in series through the spring and the PTC device. Under normal operating conditions, the PTC device is in thermal equilibrium with its surroundings. If the current rises to a fault condition, the power dissipated in the PTC device increases rapidly and the temperature rises to cause melting of the solder joint. Because of the very rapid temperature rise, substantially immediate isolation is assured through the solder joint.
ES8602881A 1985-11-01 1986-11-03 Device and method of protecting circuits against changes in operating conditions. Expired ES2005836A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858527024A GB8527024D0 (en) 1985-11-01 1985-11-01 Excess current protection device

Publications (1)

Publication Number Publication Date
ES2005836A6 true ES2005836A6 (en) 1989-04-01

Family

ID=10587621

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8602881A Expired ES2005836A6 (en) 1985-11-01 1986-11-03 Device and method of protecting circuits against changes in operating conditions.

Country Status (5)

Country Link
EP (1) EP0247080A1 (en)
AU (1) AU6592486A (en)
ES (1) ES2005836A6 (en)
GB (1) GB8527024D0 (en)
WO (1) WO1987002835A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219304C2 (en) * 1992-06-12 1994-03-31 Roederstein Kondensatoren Reliable overcurrent protection component with a small footprint and simple construction
DE19528100C2 (en) * 1995-08-01 1998-03-26 Inter Control Koehler Hermann Thermal fuse
FR2827077B1 (en) * 2001-07-06 2003-09-05 Alstom FULLY-CUT FUSE HAVING A POLYMER CURRENT-LIMITING ELEMENT HEATING A THERMAL FUSE LINK
JP4119159B2 (en) * 2002-04-25 2008-07-16 タイコ エレクトロニクス レイケム株式会社 Temperature protection element
JP4410056B2 (en) * 2004-08-04 2010-02-03 内橋エステック株式会社 Thermosensor, thermoprotector, and method of manufacturing thermosensor
US7345570B2 (en) * 2005-08-02 2008-03-18 Uchihashi Estec Co., Ltd. Thermoprotector
KR101844086B1 (en) * 2010-01-05 2018-03-30 큐로 메디컬 인크. Medical heating device and method with self-limiting electrical heating element
US10658833B2 (en) 2016-03-23 2020-05-19 Solaredge Technologies Ltd. Conductor temperature detector
US11062588B2 (en) 2016-03-23 2021-07-13 Solaredge Technologies Ltd. Conductor temperature detector
CN107764430B (en) * 2016-08-18 2022-06-28 太阳能安吉科技有限公司 Conductor temperature detector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342015B2 (en) * 1973-08-20 1976-09-09 Danfoss A/S, Nordborg (Dänemark) PROTECTIVE DEVICE FOR A STARTING ARRANGEMENT FOR SINGLE-PHASE ASYNCHRONOUS MOTORS
DE2349445A1 (en) * 1973-10-02 1975-04-10 John Myrddin Morgan Temp. regulator and overload protection system - has PTC thermistor and melting fuse allowing spring contacts to open if thermistor fails
DE2604185C3 (en) * 1976-02-04 1982-02-25 Brown, Boveri & Cie Ag, 6800 Mannheim Overtemperature protection device for an electronic switch
DE3030337A1 (en) * 1980-08-11 1982-03-18 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Overload protection circuit for electromotor - uses heat dissipated by parallel resistor to melt solder holding supply spring closed

Also Published As

Publication number Publication date
EP0247080A1 (en) 1987-12-02
WO1987002835A1 (en) 1987-05-07
AU6592486A (en) 1987-05-19
GB8527024D0 (en) 1985-12-04

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20000204