EP2544209A3 - Design for a current transformer with an integrated magnetic actuator - Google Patents

Design for a current transformer with an integrated magnetic actuator Download PDF

Info

Publication number
EP2544209A3
EP2544209A3 EP12175543.3A EP12175543A EP2544209A3 EP 2544209 A3 EP2544209 A3 EP 2544209A3 EP 12175543 A EP12175543 A EP 12175543A EP 2544209 A3 EP2544209 A3 EP 2544209A3
Authority
EP
European Patent Office
Prior art keywords
current transformer
split core
magnetic actuator
design
integrated magnetic
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
EP12175543.3A
Other languages
German (de)
French (fr)
Other versions
EP2544209B1 (en
EP2544209A2 (en
Inventor
Jeffrey Annis
Hans Weichert
Sandro Liberto
Beat Villiger
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.)
Rockwell Automation Technologies Inc
Original Assignee
Rockwell Automation Technologies Inc
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
Priority claimed from US13/177,946 external-priority patent/US8456782B2/en
Application filed by Rockwell Automation Technologies Inc filed Critical Rockwell Automation Technologies Inc
Publication of EP2544209A2 publication Critical patent/EP2544209A2/en
Publication of EP2544209A3 publication Critical patent/EP2544209A3/en
Application granted granted Critical
Publication of EP2544209B1 publication Critical patent/EP2544209B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
    • 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
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

A system comprising a magnetic actuator, a current transformer and operational electronics in a dual-coil circuit breaker. The system includes an inline, but non concentric, implementation of the primary and secondary coils to maintain a narrow width suitable for retrofitting in standard industrial rack mounted enclosures. The system further comprises a split core design that is integrated into an upper and lower plate which slide together and are retained by a secondary coil bobbin. Typically, the two parts of the split core can be manufactured into net shapes by utilizing a powder metal or metal injection molding process. Moreover, the split core design disclosed herein can reduce costs and time associated with manufacturing and assembly of the current transformer.
EP12175543.3A 2011-07-07 2012-07-09 Design for a current transformer with an integrated magnetic actuator Active EP2544209B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/177,946 US8456782B2 (en) 2009-05-08 2011-07-07 Cost effective design for a current transformer with an integrated magnetic actuator

Publications (3)

Publication Number Publication Date
EP2544209A2 EP2544209A2 (en) 2013-01-09
EP2544209A3 true EP2544209A3 (en) 2014-01-22
EP2544209B1 EP2544209B1 (en) 2019-09-04

Family

ID=47008266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12175543.3A Active EP2544209B1 (en) 2011-07-07 2012-07-09 Design for a current transformer with an integrated magnetic actuator

Country Status (2)

Country Link
EP (1) EP2544209B1 (en)
CN (1) CN103123860B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10317998B2 (en) * 2017-06-26 2019-06-11 Microsoft Technology Licensing, Llc Flexible magnetic actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760309A (en) * 1972-06-22 1973-09-18 Robertshaw Controls Co Adjustable actuating level current sensing relay
US3932791A (en) * 1973-01-22 1976-01-13 Oswald Joseph V Multi-range, high-speed A.C. over-current protection means including a static switch
US6034858A (en) * 1996-11-07 2000-03-07 Schneider Electric Sa Current transformer, trip device and circuit breaker comprising such a transformer
US20100332046A1 (en) * 2009-05-08 2010-12-30 Rockwell Automation Technologies, Inc. Current transformer with integrated actuator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566320A (en) * 1969-06-05 1971-02-23 Heinemann Electric Co Electromagnetic device having a dual coil for independent tripping thereof
KR100591251B1 (en) * 2005-04-12 2006-06-21 김명대 Iron core, molding for forming and mounting iron core and mounting method thereof
CN2798266Y (en) * 2005-04-19 2006-07-19 荣峰电子股份有限公司 Structure capable of elastic regulating for choke coil
CN101552091B (en) * 2008-12-31 2012-05-30 王向群 Metal powder injection molding inductor and processing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760309A (en) * 1972-06-22 1973-09-18 Robertshaw Controls Co Adjustable actuating level current sensing relay
US3932791A (en) * 1973-01-22 1976-01-13 Oswald Joseph V Multi-range, high-speed A.C. over-current protection means including a static switch
US6034858A (en) * 1996-11-07 2000-03-07 Schneider Electric Sa Current transformer, trip device and circuit breaker comprising such a transformer
US20100332046A1 (en) * 2009-05-08 2010-12-30 Rockwell Automation Technologies, Inc. Current transformer with integrated actuator

Also Published As

Publication number Publication date
EP2544209B1 (en) 2019-09-04
CN103123860A (en) 2013-05-29
CN103123860B (en) 2016-12-21
EP2544209A2 (en) 2013-01-09

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