EP0866484A3 - Magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material - Google Patents

Magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material Download PDF

Info

Publication number
EP0866484A3
EP0866484A3 EP97203780A EP97203780A EP0866484A3 EP 0866484 A3 EP0866484 A3 EP 0866484A3 EP 97203780 A EP97203780 A EP 97203780A EP 97203780 A EP97203780 A EP 97203780A EP 0866484 A3 EP0866484 A3 EP 0866484A3
Authority
EP
European Patent Office
Prior art keywords
shape
memory material
element made
magnetothermal
low voltage
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.)
Withdrawn
Application number
EP97203780A
Other languages
German (de)
French (fr)
Other versions
EP0866484A2 (en
Inventor
Silvia Volponi
Cesare Guida
Alberto Abisso
Elio Jacovino
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 Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP0866484A2 publication Critical patent/EP0866484A2/en
Publication of EP0866484A3 publication Critical patent/EP0866484A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/145—Electrothermal mechanisms using shape memory materials

Abstract

The present invention relates to a magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material which comprises a coil traversed by current and operationally interconnected with a magnetic trip device for instantaneously breaking the flow of current for short-circuit and a thermal trip device for breaking the flow of current for overload.The aforesaid thermal trip device consists of an element made from a shape-memory material.The novel feature of the invention consists in the fact that the aforesaid shape-memory material exhibits a temperature of transition between the martensite phase and the austenite phase of greater than 90°C and a thermal shock resistance temperature of greater than 600°C.
EP97203780A 1996-12-03 1997-12-03 Magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material Withdrawn EP0866484A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI962530 1996-12-03
IT96MI002530A IT1286425B1 (en) 1996-12-03 1996-12-03 LOW VOLTAGE MAGNETOTHERMAL SWITCH WITH SENSITIVE ELEMENT MADE OF SHAPE MEMORY MATERIAL

Publications (2)

Publication Number Publication Date
EP0866484A2 EP0866484A2 (en) 1998-09-23
EP0866484A3 true EP0866484A3 (en) 1999-03-10

Family

ID=11375332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203780A Withdrawn EP0866484A3 (en) 1996-12-03 1997-12-03 Magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material

Country Status (2)

Country Link
EP (1) EP0866484A3 (en)
IT (1) IT1286425B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ831100A0 (en) 2000-06-22 2000-07-13 Alcatel Bi-stable microswitch including shape memory alloy latch
EP1305809A1 (en) * 2000-08-04 2003-05-02 Siemens Aktiengesellschaft Switching device with a component consisting of a shape memory alloy and with means for heating the same; and corresponding joining technique
CA2577536A1 (en) * 2004-11-22 2006-06-01 Abb Patent Gmbh Switching device having an electromagnetic release
DE102010014280B4 (en) 2010-04-08 2021-11-25 Eto Magnetic Gmbh Overcurrent switching device
US8830026B2 (en) 2010-12-30 2014-09-09 General Electric Company Shape memory alloy actuated circuit breaker
CN114792613B (en) * 2022-03-30 2023-07-25 中群电气有限公司 Overload quick recovery circuit breaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061914A (en) * 1989-06-27 1991-10-29 Tini Alloy Company Shape-memory alloy micro-actuator
EP0484805A1 (en) * 1990-11-05 1992-05-13 Johnson Service Company High transformation temperature shape memory alloy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061914A (en) * 1989-06-27 1991-10-29 Tini Alloy Company Shape-memory alloy micro-actuator
EP0484805A1 (en) * 1990-11-05 1992-05-13 Johnson Service Company High transformation temperature shape memory alloy

Also Published As

Publication number Publication date
ITMI962530A1 (en) 1998-06-03
ITMI962530A0 (en) 1996-12-03
EP0866484A2 (en) 1998-09-23
IT1286425B1 (en) 1998-07-08

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