EP0373271A1 - Déclencheur électromagnétique à circuit shunt - Google Patents

Déclencheur électromagnétique à circuit shunt Download PDF

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Publication number
EP0373271A1
EP0373271A1 EP88311881A EP88311881A EP0373271A1 EP 0373271 A1 EP0373271 A1 EP 0373271A1 EP 88311881 A EP88311881 A EP 88311881A EP 88311881 A EP88311881 A EP 88311881A EP 0373271 A1 EP0373271 A1 EP 0373271A1
Authority
EP
European Patent Office
Prior art keywords
electro
magnetic
magnetic field
trip device
shunt trip
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
EP88311881A
Other languages
German (de)
English (en)
Other versions
EP0373271B1 (fr
Inventor
Dante Bagalini
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.)
Circuit Breakers Ind Ltd
Original Assignee
Circuit Breakers Ind Ltd
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 Circuit Breakers Ind Ltd filed Critical Circuit Breakers Ind Ltd
Priority to EP88311881A priority Critical patent/EP0373271B1/fr
Priority to AT88311881T priority patent/ATE93987T1/de
Priority to DE88311881T priority patent/DE3883772T2/de
Publication of EP0373271A1 publication Critical patent/EP0373271A1/fr
Application granted granted Critical
Publication of EP0373271B1 publication Critical patent/EP0373271B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Definitions

  • THIS INVENTION relates to an electro-magnetic shunt trip device. More particularly, it relates to such devices which utilise flux transfer to trip.
  • an electro-magnetic shunt trip device which includes a first member that is of a ferro-magnetic material and which is slidably displaceable between a normal position and a tripped position; a first urging means for urging the first member towards its normal position; a second member that is also of a ferro-magnetic material and which is slidably displaceable towards and away from the first member, the second member being manually displaceable towards and at least into close proximity to the first member; a second urging means for urging the first and second member away from one another with movement of the first member away from the second member being towards its tripped position; a first stop means for limiting movement of the second member away from the first member; a second stop means for limiting movement of the first member away from the second member; a magnetic path defining means for defining a magnetic path which passes through both the first and second members; a first magnetic field generating means for generating a magnetic field in the magnetic path; and an electrically
  • the second urging means when sufficient current passes through the second magnetic field generating means, to generate a reverse magnetic field which decreases the magnetic force holding the first and second members together to a suffi­cient extent, the second urging means will force the first and second members apart, and when the second member engages the stop means, the first member is then displaced, against the force exerted thereon by the first urging means, into its tripped position. It will thus be appreciated that the second urging means exerts a greater force on the first member, when the first and second members are not held together magnetically, than the force exerted on the first member by the first urging means.
  • the second member is manually displaced towards the first member with the first member moving away, with a separation between the two members and when the first member reaches its limit as set by the second stop means, the separation between the first and second member will decrease and they will come into contact, or sufficiently close together, for the magnetic forces to hold them together.
  • the device may include a movable operating member which engages the first member.
  • the first urging means may then act on this operating member which in turn acts on the first member. Movement of the operating member may be limited, so that when it reaches its limit, further movement of the first member is also limited.
  • the first magnetic field generating means may be a primary magnet or an electro-magnet.
  • first and second members are aligned and are linearly displaceable.
  • an electro-magnetic shunt trip device is designated generally by the reference numeral 10.
  • the device 10 comprises a frame 12 formed by a body member 13 and a yoke 15.
  • the body member 13 has an aperture 17 and the yoke has apertures 19 and 21 which are aligned with one another and the aperture 17.
  • the aligned apertures define a passageway 14 within which a first member, in the form of a plunger 16 of a ferro-magnetic material is slidably displaceable between a normal position and a tripped position.
  • the device 10 includes a first urging means in the form of a tension spring 18 for urging the first member towards its normal position.
  • the spring 18 has a first end 18.1 secured to the frame 12, and a second end 18.2 secured to an operating member in the form of an arm 20, the arm 20 being in abutment with the plunger 16.
  • the operating member is pivotally mounted on the frame 12 and pivots about a pivot point 22. Pivoting of the operating member away from the plunger 16 is limited by a response component such as a switch (not shown).
  • the device 10 further includes a second member in the form of a plunger 24 which is also of a ferro-magnetic material, and which is displaceable towards and away from the first plunger 16. As shown, the plungers 16 and 24 are aligned, and are linearly displaceable with respect to each other. The plunger 24 is displaceable relative to the plunger 16 against the action of an urging means in the form of a compression spring 26. A reset button 28 of a synthetic plastics material is secured to the plunger 24 and projects beyond the frame 12 to be engageable by an operator of the device 10.
  • a first magnetic field generating means in the form of a permanent magnet 30 is mounted in the yoke 15 and is in the form of two bar magnets, one on one side and one on the other side of the passageway 14 in which the plunger 16 is slidably displaceable.
  • An electrically operable second magnetic field genera­ting means in the form of an electro-magnet 32 also is mounted in the yoke 15.
  • This electro-magnet 32 is in the form of a bobbin with a coil wound thereon.
  • the bobbin has a central bore that is aligned with the passage way 14, so that the plunger 24 moves therein. The plunger 24 is thus displaceable through the central bore of the electro-magnet 32.
  • a boss 34 is mounted on the frame 12.
  • the boss 34 defines a stop means in the form of a shoulder formation 36 for limiting displacement of the plunger 24 in a direction away from the plunger 16.
  • the magnetic field generated by the electro-magnet 32 is of a polarity opposite to that of the magnetic field generated by the permanent magnet 30.
  • the second plunger 24 is urged towards the first plunger 16 from the position shown in Figure 1 to the position shown in Figure 2 in which the plungers 16 and 24 are in contact.
  • the magnetic field generated by the permanent magnet 30 produces lines of flux which reclose through mating faces of the plungers 16 and 24. This produces an attractive force which is greater that the repelling force provided by the spring 26, thereby retaining the device 10 in its reset position.
  • the electro-magnet 32 produces a magnetic field of a polarity opposite to that of the field generated by the magnet 30.
  • Movement of the operating member 20 is limited by a response switch or the like (not shown), so that when the plunger 24 is manually displaced to reset the device 10, the and the spring 26 is compressed.
  • a device 10 in accordance with the invention can accor­dingly be used to unlatch a circuit breaker, to activate or deactivate a micro-switch, or to operate an indicating flag. Further, it will be appreciated that when there is sufficient current passing through the electro-magnet 32 to cause the plungers 24 and 16 to be repelled, holding the reset button 28 so that the plunger 24 is in abutting engagement with the plunger 16 will not prevent the releasing of the shunt trip.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Impact Printers (AREA)
EP88311881A 1988-12-15 1988-12-15 Déclencheur électromagnétique à circuit shunt Expired - Lifetime EP0373271B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP88311881A EP0373271B1 (fr) 1988-12-15 1988-12-15 Déclencheur électromagnétique à circuit shunt
AT88311881T ATE93987T1 (de) 1988-12-15 1988-12-15 Elektromagnetischer ausloeser mit hebenschluss.
DE88311881T DE3883772T2 (de) 1988-12-15 1988-12-15 Elektromagnetischer Auslöser mit Hebenschluss.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88311881A EP0373271B1 (fr) 1988-12-15 1988-12-15 Déclencheur électromagnétique à circuit shunt

Publications (2)

Publication Number Publication Date
EP0373271A1 true EP0373271A1 (fr) 1990-06-20
EP0373271B1 EP0373271B1 (fr) 1993-09-01

Family

ID=8200321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88311881A Expired - Lifetime EP0373271B1 (fr) 1988-12-15 1988-12-15 Déclencheur électromagnétique à circuit shunt

Country Status (3)

Country Link
EP (1) EP0373271B1 (fr)
AT (1) ATE93987T1 (fr)
DE (1) DE3883772T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073549A1 (fr) * 1999-05-31 2000-12-07 Rieter Elitex A.S. Piece a degagement, en particulier piece a degagement pour moyens de coconnage de metier a filer
WO2003049129A1 (fr) * 2001-11-29 2003-06-12 Blp Components Limited Contacteurs
CN1315146C (zh) * 2004-01-08 2007-05-09 吉林永大集团有限公司 一种永磁机构的外置式机械手动分闸装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515258A (en) * 1947-04-08 1950-07-18 Pierce John B Foundation Electromagnet with split core armature
FR1402053A (fr) * 1964-04-28 1965-06-11 Teco Relais ultra-sensible à rémanence, à haute stabilité
FR2033397A1 (fr) * 1969-02-26 1970-12-04 Westinghouse Electric Corp
EP0078324A1 (fr) * 1981-04-30 1983-05-11 Matsushita Electric Works, Ltd. Relais electromagnetique polarise

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515258A (en) * 1947-04-08 1950-07-18 Pierce John B Foundation Electromagnet with split core armature
FR1402053A (fr) * 1964-04-28 1965-06-11 Teco Relais ultra-sensible à rémanence, à haute stabilité
FR2033397A1 (fr) * 1969-02-26 1970-12-04 Westinghouse Electric Corp
EP0078324A1 (fr) * 1981-04-30 1983-05-11 Matsushita Electric Works, Ltd. Relais electromagnetique polarise

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073549A1 (fr) * 1999-05-31 2000-12-07 Rieter Elitex A.S. Piece a degagement, en particulier piece a degagement pour moyens de coconnage de metier a filer
CN100383301C (zh) * 1999-05-31 2008-04-23 里特捷克有限公司 一种在纺纱机上用以释放生头装置的释放元件
WO2003049129A1 (fr) * 2001-11-29 2003-06-12 Blp Components Limited Contacteurs
GB2398427A (en) * 2001-11-29 2004-08-18 Blp Components Ltd Contactors
GB2398427B (en) * 2001-11-29 2005-08-24 Blp Components Ltd Contactors
CN1315146C (zh) * 2004-01-08 2007-05-09 吉林永大集团有限公司 一种永磁机构的外置式机械手动分闸装置

Also Published As

Publication number Publication date
EP0373271B1 (fr) 1993-09-01
ATE93987T1 (de) 1993-09-15
DE3883772T2 (de) 1994-01-27
DE3883772D1 (de) 1993-10-07

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