EP0866484A2 - 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 PDFInfo
- Publication number
- EP0866484A2 EP0866484A2 EP97203780A EP97203780A EP0866484A2 EP 0866484 A2 EP0866484 A2 EP 0866484A2 EP 97203780 A EP97203780 A EP 97203780A EP 97203780 A EP97203780 A EP 97203780A EP 0866484 A2 EP0866484 A2 EP 0866484A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- shape
- memory material
- magnetothermal
- circuit breaker
- 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- Withdrawn
Links
Images
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
Landscapes
- Thermally Actuated Switches (AREA)
- Semiconductor Memories (AREA)
- Hall/Mr Elements (AREA)
Abstract
Description
Claims (9)
- A magnetothermal low voltage circuit breaker with sensitive element made from shape-memory material comprising 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 said thermal trip device consisting of an element made from shape-memory material, characterised in that the said 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.
- A magnetothermal low voltage circuit breaker according to claim 1, characterised in that the shape-memory material is an alloy containing hafnium.
- A magnetothermal low voltage circuit breaker according to any of the preceding claims, characterised in that the said shape-memory material is an alloy containing nickel, titanium and hafnium.
- A magnetothermal low voltage circuit breaker according to one or more of the preceding claims, characterised in that the said shape-memory material is an alloy containing nickel from 30 to 51% titanium from 20 to 66.5% and hafnium from 35 to 40%.
- A magnetothermal low voltage circuit breaker according to one or more of the preceding claims, characterised in that the said thermal trip device comprises a strip made from the said shape-memory material and able to modify its shape so that a portion of it acts on the trigger mechanism of the said magnetothermal circuit breaker.
- A magnetothermal low voltage circuit breaker according to one or more of the preceding claims, characterised in that the said thermal trip device made from shape-memory material acts on an actuator which can engage with the trigger mechanism, the said thermal trip device being able to adopt a first configuration in which it latches the said actuator, and a second configuration in which it unlatches the said actuator.
- A magnetothermal low voltage circuit breaker according to claim 6, characterised in that the said thermal trip device comprises a shape memory alloy retention device which, in a first contracted configuration, latches the said actuator, and in a second expanded configuration, in unlatches the said actuator.
- A magnetothermal low voltage circuit breaker according to one or more of the preceding claims, characterised in that it comprises a mechanism for restoring the shape typical of the rest condition of the thermal trip device made from the said shape-memory material, said mechanism being incorporated within the resetting mechanism of the circuit breaker.
- A magnetothermal low voltage circuit breakers according to one or more of the preceding claims, characterised in that it comprises a mechanism for restoring the original shape of the thermal trip device made from shape-memory material, said mechanism being obtained from a 2-way shape-memory material able to restore its typical shape under rest conditions upon the return to the temperature corresponding to the martensite phase.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT96MI002530A IT1286425B1 (en) | 1996-12-03 | 1996-12-03 | LOW VOLTAGE MAGNETOTHERMAL SWITCH WITH SENSITIVE ELEMENT MADE OF SHAPE MEMORY MATERIAL |
ITMI962530 | 1996-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0866484A2 true EP0866484A2 (en) | 1998-09-23 |
EP0866484A3 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) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002013220A1 (en) * | 2000-08-04 | 2002-02-14 | Siemens Aktiengesellschaft | Switching device with a component consisting of a shape memory alloy and with means for heating the same; and corresponding joining technique |
US6603386B2 (en) | 2000-06-22 | 2003-08-05 | Alcatel | Bi-stable microswitch including shape memory alloy latch |
WO2006056335A1 (en) * | 2004-11-22 | 2006-06-01 | Abb Patent Gmbh | Switching equipment comprising an electromagnetic trip device |
DE102010014280A1 (en) * | 2010-04-08 | 2011-10-13 | Eto Magnetic Gmbh | Overcurrent switching device |
EP2472548A1 (en) * | 2010-12-30 | 2012-07-04 | General Electric Company | Shape memory alloy actuated circuit breaker |
CN114792613A (en) * | 2022-03-30 | 2022-07-26 | 中群电气有限公司 | Overload quick recovery circuit breaker |
Citations (2)
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 |
-
1996
- 1996-12-03 IT IT96MI002530A patent/IT1286425B1/en active IP Right Grant
-
1997
- 1997-12-03 EP EP97203780A patent/EP0866484A3/en not_active Withdrawn
Patent Citations (2)
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 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6603386B2 (en) | 2000-06-22 | 2003-08-05 | Alcatel | Bi-stable microswitch including shape memory alloy latch |
WO2002013220A1 (en) * | 2000-08-04 | 2002-02-14 | Siemens Aktiengesellschaft | Switching device with a component consisting of a shape memory alloy and with means for heating the same; and corresponding joining technique |
WO2006056335A1 (en) * | 2004-11-22 | 2006-06-01 | Abb Patent Gmbh | Switching equipment comprising an electromagnetic trip device |
DE102010014280A1 (en) * | 2010-04-08 | 2011-10-13 | Eto Magnetic Gmbh | Overcurrent switching device |
US8860534B2 (en) | 2010-04-08 | 2014-10-14 | Eto Magnetic Gmbh | Overcurrent switching device |
DE102010014280B4 (en) | 2010-04-08 | 2021-11-25 | Eto Magnetic Gmbh | Overcurrent switching device |
EP2472548A1 (en) * | 2010-12-30 | 2012-07-04 | General Electric Company | Shape memory alloy actuated circuit breaker |
CN102568955A (en) * | 2010-12-30 | 2012-07-11 | 通用电气公司 | Shape memory alloy actuated circuit breaker |
US8830026B2 (en) | 2010-12-30 | 2014-09-09 | General Electric Company | Shape memory alloy actuated circuit breaker |
CN102568955B (en) * | 2010-12-30 | 2016-01-20 | 通用电气公司 | The circuit breaker of shape memory alloy actuated |
CN114792613A (en) * | 2022-03-30 | 2022-07-26 | 中群电气有限公司 | Overload quick recovery circuit breaker |
CN114792613B (en) * | 2022-03-30 | 2023-07-25 | 中群电气有限公司 | Overload quick recovery circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
IT1286425B1 (en) | 1998-07-08 |
ITMI962530A1 (en) | 1998-06-03 |
EP0866484A3 (en) | 1999-03-10 |
ITMI962530A0 (en) | 1996-12-03 |
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Legal Events
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