EP0117788A1 - Magneto-thermische Vorrichtung für Überstromrelais - Google Patents

Magneto-thermische Vorrichtung für Überstromrelais Download PDF

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Publication number
EP0117788A1
EP0117788A1 EP84400206A EP84400206A EP0117788A1 EP 0117788 A1 EP0117788 A1 EP 0117788A1 EP 84400206 A EP84400206 A EP 84400206A EP 84400206 A EP84400206 A EP 84400206A EP 0117788 A1 EP0117788 A1 EP 0117788A1
Authority
EP
European Patent Office
Prior art keywords
core
magneto
thermal device
magnetizable
branch
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
EP84400206A
Other languages
English (en)
French (fr)
Other versions
EP0117788B1 (de
Inventor
Dominique Moreau
Pierre Duchemin
Jean-Pierre Duchemin
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT84400206T priority Critical patent/ATE22505T1/de
Publication of EP0117788A1 publication Critical patent/EP0117788A1/de
Application granted granted Critical
Publication of EP0117788B1 publication Critical patent/EP0117788B1/de
Expired legal-status Critical Current

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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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism

Definitions

  • the invention relates to a magneto-thermal device, capable of producing the opening of a safety switch when the current flowing through it presents either an excessive instantaneous intensity or a less intense intensity but of too long duration;
  • this device comprises a bimetallic strip, a magnetizable yoke with which are associated: on the one hand, an adjustable screwed core which is surrounded by a coil and, on the other hand, an angularly movable pallet around one end of the yoke to cooperate with one end of this core placed substantially at the same level and against a return spring, and locking means associated with this core to ensure the adjustment position.
  • thermal relays Such devices are widely used in devices, commonly called thermal relays, which are intended to monitor the currents flowing in a load, in particular in an electric motor, to interrupt its supply when the current which it consumes takes abnormal values.
  • the respective position of the active end of the core and of the pallet is adjusted by moving an opposite threaded end into a threaded opening in the cylinder head, while blocking the chosen setting is operated using a locking nut which is engaged on this threaded end.
  • Such a known device has the drawback of possible driving of the core at the moment when a locking torque is communicated to the nut; when the thread pitch is fine, such a drive remains weak; but, even in this case, it is not excluded that the locking forces cause a slight lateral displacement of the active end and modify the leakage air gap which exists between it and the end of the cylinder head.
  • the invention therefore proposes to provide a device in accordance with that the constitution of which is mentioned above, but in which measures will be taken so that the core locking means do not modify the lateral position of the active end of the core and ensure the permanence of the adjustment made.
  • the desired result is obtained thanks to the fact that, in a plane perpendicular to the axis of the core and close to the end of the cylinder head serving as a pivot for the pallet, a non-magnetizable flat part is placed in compression radial between the end of the core and a face of the breech branch situated opposite, the radial dimension of this part being slightly greater than the distance which separates this end and this face in the absence of this part.
  • a magneto-thermal device 1, visible in FIG. 1, is for example placed inside a protection device 2, so that a current flowing through a load and between terminals 3 and 4 passes through a relay magnetic 5 and a bimetallic strip 6 placed in series.
  • a movable pallet 33 of this relay and a movable end 6a of this bimetallic strip transmit the displacements or deformations which they undergo (possibly by the intermediary of means ralen weavers 7 or association means 8 common to several identical bimetallic strips) to a member or abrupt tripping mechanism 9 whose release causes the opening of a safety switch 10.
  • the terminals of this switch which do not have shown, are themselves associated with a control circuit capable of establishing or interrupting in a known manner the supply of the load.
  • the relay 5 visible in FIG. 2, comprises a magnetizable yoke 11 having two perpendicular wings 12 and 13, the shortest of which 12 is, in the illustrated embodiment, welded to a support plate 14.
  • an insulating carcass 20 on which is wound, between two cheeks 21, 22 of the carcass, a winding 23.
  • the lower cheek 21 adjacent to the branch 12 supports a conductive part 24 which is associated with the terminal 3 and is soldered to one end 25a of the coil wire.
  • the upper cheek 22 has, in a plane PP 'close to the end 19 and substantially perpendicular to the axis XX', see Figures 4 and 5, a groove 26, which is open towards the internal face 27 of the branch 13 and which opens up to the internal bore 28 of the carcass.
  • This groove which is open laterally at least towards one side 29 of the cheek 22, see FIG. 4, receives a non-magnetizable metallic flat part 30 made for example from aluminum, brass or stainless steel.
  • This part which can slide in the groove in the manner of a wedge 32, has a radial dimension "d" greater than the distance separating the face 27 of the cylindrical surface 31 of the core 17 placed opposite, this distance being measured when the part 30 is not mounted.
  • this piece 30 is placed in compression when it is put in place, or that the core 17 is subjected to a stress perpendicular to the axis XX '; an elastic wedging effect of the core 17 is therefore operated in the region where the end 16 and the opening 15 cooperate.
  • the part 30 consequently comprises a bevelled region 34 which is followed first by a notch 35, then by a rectilinear wall 36; this wall and this bevelled region have widths "e" slightly greater than the distance "d"; the engagement of the part 30 is carried out in the direction of the arrow F by producing slight elastic deformations of the core and of the branch 13, until a snap-action of the notch 35 takes place on the surface 31 of the end 18 of the core 17.
  • the magnetizable pallet 33 which has been mentioned above pivots around an edge 37 placed at the end 19 of the branch 13, perpendicular to the axis XX 'and is subjected to a restoring force delivered by a spring 38.
  • the pallet is held and guided in the rest position, on the one hand by means of a tongue 39 which is placed in the axial extension of the branch 13 to pass through an opening 40 in this pallet and, on the other hand, by means of two ears 41, 42 which surround the latter laterally, see FIGS. 3 and 5.
  • the two ears 41, 42 are carried by a cut flat piece 43, which is fixed to the external face 44 of the branch 13, for example using solder points 45; a notch 46, which is located between the ears 41, 42 at the top, is placed lower than the edge 37 and at a level such that no material contact is established with the underside 48 of this pallet.
  • this part 43 has been used to serve as an adjustable support for bimetallic strip 6, thanks to the angled shape which has been given to it.
  • the transverse portion 47 of the part 43 carrying the ears 41, 42 and the welding points 45 is connected to an extension 49 substantially perpendicular by a constricted portion 50.
  • This constricted portion is adjacent to a first bent tab 51 which is connected to the end 25b of the winding passing through a notch 52 of the branch 13 of the cylinder head, while a second bent tab 53, equipped with a finger 54 for hooking the spring 38, is carried by the extension 49.
  • an edge 55 of the extension 49 which is inclined relative to the axis XX ', is placed against the end 56 of a screw 57, of axis parallel to XX', which is engaged in a threaded opening 58 of the wafer 14.
  • This wafer finally comprises fixing means, not shown, which allow it to be rigidly associated with a fixed wall 59 of the device.
  • the position of the upper end 6a of the bimetallic strip 6, which is parallel to the axis XX 'and whose lower end 6b is fixed on the tab 53, can be adjusted in the direction G by virtue of the lateral displacement effected by the edge 55 when the screw 57 is moved along its axis; this movement is made possible by the elastic deformation which the constricted portion 50 can undergo.
  • a first end of a heater 6c is connected to the end 6a of the bimetallic strip, while a second end 6d is connected by a conductor 60 to the terminal 4, see FIGS. 2 and 3.
  • the angular movement of the pallet 33 is communicated, in the direction L, by a pusher 61 coming from one piece with a plastic cap 62 which is fixed on this pallet.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Relay Circuits (AREA)
  • Electronic Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Manufacture Of Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Protection Of Generators And Motors (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP84400206A 1983-02-23 1984-01-31 Magneto-thermische Vorrichtung für Überstromrelais Expired EP0117788B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400206T ATE22505T1 (de) 1983-02-23 1984-01-31 Magneto-thermische vorrichtung fuer ueberstromrelais.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8302909A FR2541508A1 (fr) 1983-02-23 1983-02-23 Dispositif magneto-thermique pour relais de surintensite
FR8302909 1983-02-23

Publications (2)

Publication Number Publication Date
EP0117788A1 true EP0117788A1 (de) 1984-09-05
EP0117788B1 EP0117788B1 (de) 1986-09-24

Family

ID=9286177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400206A Expired EP0117788B1 (de) 1983-02-23 1984-01-31 Magneto-thermische Vorrichtung für Überstromrelais

Country Status (10)

Country Link
US (1) US4535309A (de)
EP (1) EP0117788B1 (de)
JP (1) JPS59160932A (de)
AT (1) ATE22505T1 (de)
BR (1) BR8400792A (de)
CA (1) CA1200267A (de)
DE (2) DE117788T1 (de)
DK (1) DK95784A (de)
ES (1) ES529987A0 (de)
FR (1) FR2541508A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108461362A (zh) * 2017-02-22 2018-08-28 浙江正泰电器股份有限公司 断路器及其装配方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346728A (ja) * 1989-07-13 1991-02-28 Omron Corp 電磁継電器
US5866996A (en) * 1996-12-19 1999-02-02 Siemens Energy & Automation, Inc. Contact arm with internal in-line spring
US5894260A (en) * 1996-12-19 1999-04-13 Siemens Energy & Automation, Inc. Thermal sensing bi-metal trip actuator for a circuit breaker
US5844188A (en) * 1996-12-19 1998-12-01 Siemens Energy & Automation, Inc. Circuit breaker with improved trip mechanism
US6087914A (en) * 1996-12-19 2000-07-11 Siemens Energy & Automation, Inc. Circuit breaker combination thermal and magnetic trip actuator
JP2010009906A (ja) * 2008-06-26 2010-01-14 Fuji Electric Fa Components & Systems Co Ltd サーマルリレー
DE102016105341B4 (de) * 2016-03-22 2022-05-25 Eaton Intelligent Power Limited Schutzschaltgerät

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275959A (en) * 1964-12-15 1966-09-27 Zinsco Electrical Products Circuit breaker with externally adjustable tripping mechanism
GB1401181A (en) * 1971-10-19 1975-07-16 Crabtree & Co Ltd J A Circuit breakers and the like electrical products

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1825312A (en) * 1925-10-17 1931-09-29 Cutler Hammer Inc Circuit controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275959A (en) * 1964-12-15 1966-09-27 Zinsco Electrical Products Circuit breaker with externally adjustable tripping mechanism
GB1401181A (en) * 1971-10-19 1975-07-16 Crabtree & Co Ltd J A Circuit breakers and the like electrical products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108461362A (zh) * 2017-02-22 2018-08-28 浙江正泰电器股份有限公司 断路器及其装配方法
CN108461362B (zh) * 2017-02-22 2020-06-30 浙江正泰电器股份有限公司 断路器的装配方法

Also Published As

Publication number Publication date
US4535309A (en) 1985-08-13
DK95784A (da) 1984-08-24
ATE22505T1 (de) 1986-10-15
JPS59160932A (ja) 1984-09-11
ES8501165A1 (es) 1984-11-01
FR2541508A1 (fr) 1984-08-24
BR8400792A (pt) 1984-09-25
FR2541508B1 (de) 1985-03-22
ES529987A0 (es) 1984-11-01
DK95784D0 (da) 1984-02-23
EP0117788B1 (de) 1986-09-24
DE117788T1 (de) 1984-12-20
DE3460785D1 (en) 1986-10-30
CA1200267A (fr) 1986-02-04

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