EP1127363A1 - Thermal overload relay provided with a spring leaf mechanism - Google Patents
Thermal overload relay provided with a spring leaf mechanismInfo
- Publication number
- EP1127363A1 EP1127363A1 EP99954049A EP99954049A EP1127363A1 EP 1127363 A1 EP1127363 A1 EP 1127363A1 EP 99954049 A EP99954049 A EP 99954049A EP 99954049 A EP99954049 A EP 99954049A EP 1127363 A1 EP1127363 A1 EP 1127363A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- support
- protection relay
- foot
- housing
- 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
Links
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000003831 deregulation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- H01H71/16—Electrothermal mechanisms with bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
- H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
- H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements
Definitions
- the present invention relates to an electromechanical thermal protection relay comprising in a housing elements, such as bimetallic strips, thermally deformable in the event of overcurrent in power current lines, as well as switch contacts associated with power lines and capable of be actuated by a control member which can be biased by the deformed elements.
- the control member acts at a midpoint of a thin and flexible blade which has a foot fixed or supported on the housing and a head cooperating with an element for operating the contacts.
- the force undergone by the blade at its midpoint results in an abrupt displacement of the head from a stable position of rest to a stable position of work, while the blade foot remains substantially in its initial position.
- the blade is designed, produced and mounted so as to be able to blister from one stable position to the other, that is to say to be able to bend suddenly and it has for this purpose, in its middle part and to constitute a range of application for the control member, a finger projecting into an open area.
- a relay of this type is described in document FR-1 274 608.
- the preload necessary for blistering the blade is then produced by the rigid fixing, with tightening, of two branches provided at the foot of the blade. This embodiment is difficult to reproduce and does not allow the positions of the head to be adjusted.
- the object of the invention is to remedy the aforementioned drawbacks and to make the manufacturing characteristics, in particular the adjustment conditions, of a thermal relay of the type described, reliable and reproducible, while giving it a small footprint.
- the base of the flexible blade has a folded extension to apply elastically against a bearing surface of the housing so as to cause the blade to pressurize towards the support.
- the extension may in particular extend from the base of the blade in the direction of the length thereof and be folded, beyond the area of attachment of the rigid support on the blade, in the form of V or of U relative to the general plane of the blade, the free branch of the V or of the U being applied against the bearing surface of the housing.
- the extension may include two symmetrical branches.
- the pivoting fulcrum of the blade support is located along the length of the blade substantially at the level of the range of application of the control member on the blade.
- the adjusting member may have a cam applied to the rigid support of the blade on its side of the pivoting fulcrum, this cam being capable of turning around an axis parallel to the general plane of the blade.
- Figure 1 shows in section a thermal protection relay according to the invention.
- Figure 2 is a perspective view of the blistering elastic blade of the relay
- FIGS. 3 and 4 show the blade respectively in front and side elevation.
- the illustrated electromechanical thermal protection relay comprises an insulating box 10 which offers a front face 10a provided with operating and adjusting members 10b and which contains bimetallic strips not indicated, deformable in the event of overcurrent in power current lines also not shown.
- the housing 10 houses pairs of normally closed (NC) switch contacts 11 and normally open (NO) switch contacts 12, the movable contacts of which are situated at the ends of respective elastic strips 13, 14 which can be controlled by a trigger mechanism 15 in response to the deformation of at least one bimetallic strip.
- the trigger mechanism 15 comprises a control member 16 acting on a flexible blistering blade 20 which will act on the contacts.
- the control member 16 is for example a lever pivoting about an axis X1 and a part of which is formed by a bimetallic strip for compensating for ambient temperature.
- the flexible blade 20 extends in the direction of its length over a distance h and it is symmetrical with respect to a plane Q which defines a main director X2 at rest and X'2 in work.
- the general surface of the blade is slightly curved and will be described hereinafter as a general plan P.
- the blade has a foot 21 supported by means of a support 30 on a surface 17 of the housing, as well as a head 22 and a middle part 23.
- the head 22 of the blade cooperates with a slide 18 for operating the contacts 11, 12 to move it in a direction Y1 parallel to the front face 10a of the housing.
- the middle part 23 of the blade located between the foot 21 and the head 22, is provided with a finger 24, projecting in an openwork region 25.
- the finger 24 constitutes an application range 24a for the control lever 16 , the latter exerting in the event of an overcurrent a force in a direction Y2 parallel to the front face 10a of the housing and contrary to Y1.
- the rigid support 30, in the form of a wafer or the like.
- the plate is arranged on the side of the blade opposite the lever 16 and has at its lower part an attachment zone 31, associated with an attachment range 26 of the base 21 of the blade, and at its upper part a fulcrum 32 to pivot on the fixed surface 17 of the housing.
- the blade 20 or preferably the plate 30 is biased by an adjustment member 34 able to move it along Y1 or Y2.
- the adjusting member 34 rotates around an axis X3 and offers a cam surface 35 applied to the end 33 of the plate 30 to pivot the plate 30 and with it the flexible blade 20 around the pivot axis X4 defined by the bearing 17 and the fulcrum 32, in order to adjust the position of the head 22 of the blade which cooperates with the slide.
- the adjusting member 34 is easily accessible by opening the housing before fitting a cover (not shown).
- the axes X1, X3, X4 are mutually parallel and are perpendicular to Y1 N2 as well as to the plane of symmetry Q of the blade.
- the foot 21 of the blade 20 is provided with an extension 27 consisting either of a branch, or preferably of two elastic branches 28, 29.
- the extension 27 is directed from the foot along the length of the blade.
- the branches 28, 29 are symmetrical with respect to the Q plane.
- the branches 28, 29 are folded down in a V or U shape by folding, with a fold angle greater than 135 ° and here close to 180 °, and their free end is in support on a bearing 36 of the housing. It can be seen that this configuration of the blade reduces the overall length of the blade while producing the desired pressure of the pivot 32 on the bearing 17.
- the pivot axis X4 is located, in the direction of the height of the blade, substantially at the level of the bearing surface 24a of the finger 24 of the blade, so that the adjustment of the position of the head 22 has a very low impact on the rest position of the lever 16 and therefore on the initial state of the control mechanism.
- the distance e between axis X4 and range 24a can for example be less than 10%; preferably 7%, of the length h of the blade.
- the blade 20 is introduced into the housing between the pivoting support 17 and the bearing surface 36 which pressurizes the support 17; the foot 21 is applied against the adjustment cam 35, while the head is engaged in the slide 18.
- the lever 16 is applied to the pad 24a.
- the operator rotates the member 34 until the desired position is obtained, without disturbing the mechanism 15 thanks to the provisions of the invention.
Landscapes
- Thermally Actuated Switches (AREA)
- Breakers (AREA)
- Springs (AREA)
- Fuses (AREA)
- Vehicle Body Suspensions (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Blinds (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9813974 | 1998-11-05 | ||
FR9813974A FR2785717B1 (en) | 1998-11-05 | 1998-11-05 | THERMAL RELAY WITH SPRING BLADE MECHANISM |
PCT/FR1999/002684 WO2000028560A1 (en) | 1998-11-05 | 1999-11-03 | Thermal overload relay provided with a spring leaf mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1127363A1 true EP1127363A1 (en) | 2001-08-29 |
EP1127363B1 EP1127363B1 (en) | 2002-06-05 |
Family
ID=9532439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99954049A Expired - Lifetime EP1127363B1 (en) | 1998-11-05 | 1999-11-03 | Thermal overload relay provided with a spring leaf mechanism |
Country Status (13)
Country | Link |
---|---|
US (1) | US6507266B1 (en) |
EP (1) | EP1127363B1 (en) |
KR (1) | KR100646677B1 (en) |
CN (1) | CN1192405C (en) |
AT (1) | ATE218747T1 (en) |
AU (1) | AU755469B2 (en) |
BR (1) | BR9915057B1 (en) |
DE (1) | DE69901727T2 (en) |
ES (1) | ES2177333T3 (en) |
FR (1) | FR2785717B1 (en) |
RU (1) | RU2210829C2 (en) |
WO (1) | WO2000028560A1 (en) |
ZA (1) | ZA200103571B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6737599B1 (en) * | 2003-07-29 | 2004-05-18 | Emerson Electric Co. | Motor starting switch |
KR100881365B1 (en) * | 2007-08-07 | 2009-02-02 | 엘에스산전 주식회사 | Trip sensitivity adjusting method for thermal overload protection apparatus |
KR100905021B1 (en) * | 2007-08-07 | 2009-06-30 | 엘에스산전 주식회사 | Thermal overload trip apparatus and trip sensitivity adjusting method for the same |
JP4906881B2 (en) * | 2009-03-27 | 2012-03-28 | 富士電機機器制御株式会社 | Thermal overload relay |
JP4706772B2 (en) * | 2009-03-27 | 2011-06-22 | 富士電機機器制御株式会社 | Thermal overload relay |
US8534717B2 (en) * | 2009-04-30 | 2013-09-17 | Motorola Solutions, Inc. | Interconnect assembly |
CN103187213B (en) * | 2011-12-29 | 2015-03-25 | 上海良信电器股份有限公司 | Movement mechanism of thermal overload relay |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015007A (en) * | 1959-11-19 | 1961-12-26 | Gen Electric Canada | Thermal device |
FR1274608A (en) * | 1960-09-14 | 1961-10-27 | Realisations Mecaniques S E R | Snap-action tripping device and contactor device including application |
CH537088A (en) * | 1972-09-26 | 1973-05-15 | Sprecher & Schuh Ag | Snap-action switch for a thermal release, especially for motor protection |
US4118610A (en) * | 1974-11-16 | 1978-10-03 | Ranco Incorporated | Snap action switch blades |
US4250367A (en) * | 1978-07-14 | 1981-02-10 | Ranco Incorporated | Snap action switch blades |
JPH069432Y2 (en) * | 1986-10-17 | 1994-03-09 | 三菱電機株式会社 | Thermal overcurrent relay |
US4908594A (en) * | 1987-07-14 | 1990-03-13 | Fuji Electric Co., Ltd. | Thermal overload relay |
JPH071665B2 (en) * | 1988-09-20 | 1995-01-11 | 富士電機株式会社 | Inversion spring mechanism of thermal overload relay |
DE3840064A1 (en) * | 1988-11-28 | 1990-05-31 | Kloeckner Moeller Elektrizit | Thermal relay having a switching rocker |
JP2606348B2 (en) * | 1989-02-13 | 1997-04-30 | 富士電機株式会社 | Operation display for thermal overload relay |
US5021762A (en) * | 1990-08-03 | 1991-06-04 | Robertshaw Controls Company, Inc. | Thermal cycling switch |
DE4032942A1 (en) * | 1990-10-17 | 1992-04-23 | Ego Elektro Blanc & Fischer | DEVICE FOR CONTROLLING AN ENVIRONMENTAL INFLUENCE ON DEVICES |
JPH0574306A (en) * | 1991-09-13 | 1993-03-26 | Matsushita Electric Works Ltd | Overcurrent relay |
US5191310A (en) * | 1992-07-09 | 1993-03-02 | Eaton Corporation | Adjustable cycling switch for electric range |
JPH08293241A (en) * | 1995-04-25 | 1996-11-05 | Matsushita Electric Works Ltd | Overcurrent relay |
JP3298428B2 (en) * | 1996-05-22 | 2002-07-02 | 富士電機株式会社 | Inverted spring contact switching mechanism and thermal overload relay |
US5877670A (en) * | 1997-02-07 | 1999-03-02 | Sehlhorst; Scott B. | Heat motor operated load regulating switch assembly and knob attachment therefor |
US5847636A (en) * | 1997-02-07 | 1998-12-08 | Sehlhorst; Scott B. | Heat motor operated load regulating switch assembly |
US5790010A (en) * | 1997-02-11 | 1998-08-04 | Schwab; Pierre P. | Means for actuating a snap-acting M-blade |
US6108010A (en) * | 1997-07-18 | 2000-08-22 | International Business Machines Corp. | Method and system for a true-scale motion path editor |
DE19833983A1 (en) * | 1998-07-29 | 2000-02-03 | Ego Elektro Geraetebau Gmbh | Method of manufacturing an electrical switching device and electrical switching device |
-
1998
- 1998-11-05 FR FR9813974A patent/FR2785717B1/en not_active Expired - Fee Related
-
1999
- 1999-11-03 EP EP99954049A patent/EP1127363B1/en not_active Expired - Lifetime
- 1999-11-03 AT AT99954049T patent/ATE218747T1/en not_active IP Right Cessation
- 1999-11-03 AU AU10510/00A patent/AU755469B2/en not_active Ceased
- 1999-11-03 BR BRPI9915057-3A patent/BR9915057B1/en not_active IP Right Cessation
- 1999-11-03 DE DE69901727T patent/DE69901727T2/en not_active Expired - Lifetime
- 1999-11-03 ES ES99954049T patent/ES2177333T3/en not_active Expired - Lifetime
- 1999-11-03 CN CNB998129143A patent/CN1192405C/en not_active Expired - Fee Related
- 1999-11-03 US US09/808,000 patent/US6507266B1/en not_active Expired - Lifetime
- 1999-11-03 RU RU2001115089/09A patent/RU2210829C2/en not_active IP Right Cessation
- 1999-11-03 WO PCT/FR1999/002684 patent/WO2000028560A1/en active IP Right Grant
- 1999-11-03 KR KR1020017005630A patent/KR100646677B1/en not_active IP Right Cessation
-
2001
- 2001-05-03 ZA ZA200103571A patent/ZA200103571B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO0028560A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2177333T3 (en) | 2002-12-01 |
CN1325536A (en) | 2001-12-05 |
FR2785717B1 (en) | 2000-12-08 |
BR9915057B1 (en) | 2015-02-24 |
KR20010089401A (en) | 2001-10-06 |
RU2210829C2 (en) | 2003-08-20 |
AU755469B2 (en) | 2002-12-12 |
FR2785717A1 (en) | 2000-05-12 |
WO2000028560A1 (en) | 2000-05-18 |
EP1127363B1 (en) | 2002-06-05 |
DE69901727T2 (en) | 2002-10-31 |
DE69901727D1 (en) | 2002-07-11 |
ATE218747T1 (en) | 2002-06-15 |
KR100646677B1 (en) | 2006-11-17 |
ZA200103571B (en) | 2002-05-03 |
US6507266B1 (en) | 2003-01-14 |
CN1192405C (en) | 2005-03-09 |
AU1051000A (en) | 2000-05-29 |
BR9915057A (en) | 2001-08-07 |
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