GB2018522A - Transformer - Google Patents

Transformer

Info

Publication number
GB2018522A
GB2018522A GB7912278A GB7912278A GB2018522A GB 2018522 A GB2018522 A GB 2018522A GB 7912278 A GB7912278 A GB 7912278A GB 7912278 A GB7912278 A GB 7912278A GB 2018522 A GB2018522 A GB 2018522A
Authority
GB
United Kingdom
Prior art keywords
core
conductors
turns
transformer
insulated
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
GB7912278A
Other versions
GB2018522B (en
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB2018522A publication Critical patent/GB2018522A/en
Application granted granted Critical
Publication of GB2018522B publication Critical patent/GB2018522B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers
    • 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
    • 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
    • H01F38/38—Instruments transformers for polyphase ac
    • 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
    • H01F2038/305—Constructions with toroidal magnetic core
    • 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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H01H2083/148—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer with primary windings formed of rigid copper conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

A transformer, particularly for use as a core balance, or differential, transformer for use in earth fault circuit breakers, has a core about which there are disposed interconnected individual turns of insulated solid conductors. The turns 2 at different potentials are soldered or welded together at staggered points 4 on the outside surface of the core so as to enable substantially inflexible, lacquer insulated, conductors to be used for the turns without introducing mechanical stresses on the core which happens when such conductors are wound on a core and which cause impairment of the mechanical properties of the core. <IMAGE>
GB7912278A 1978-04-10 1979-04-06 Transformer Expired GB2018522B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19787810616U DE7810616U1 (en) 1978-04-10 1978-04-10 SUMMARY CURRENT CONVERTER, IN PARTICULAR FOR FAULT CURRENT CIRCUIT BREAKERS

Publications (2)

Publication Number Publication Date
GB2018522A true GB2018522A (en) 1979-10-17
GB2018522B GB2018522B (en) 1982-10-06

Family

ID=6690326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7912278A Expired GB2018522B (en) 1978-04-10 1979-04-06 Transformer

Country Status (4)

Country Link
DE (1) DE7810616U1 (en)
FR (1) FR2423043A1 (en)
GB (1) GB2018522B (en)
IT (1) IT1112047B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081561B (en) * 1959-01-08 1960-05-12 Purrmann & Herr G M B H Current or voltage transformer with two-part primary connection bar
GB1166827A (en) * 1965-12-21 1969-10-08 English Electric Co Ltd Inductive Devices having Toroidal Magnetic Cores
DE1563332A1 (en) * 1966-04-22 1970-01-29 Siemens Ag Summation current transformer for residual current circuit breaker
DE2503691A1 (en) * 1975-01-30 1976-08-05 Bbc Brown Boveri & Cie Transformer with toroidal ferromagnetic core - has separate windings of strip wire conductor in insulating foils
DE2659772A1 (en) * 1976-12-31 1978-07-06 Siemens Ag SUMMARY CURRENT CONVERTER, IN PARTICULAR FOR FAULT CURRENT CIRCUIT BREAKERS
DE2717417C2 (en) * 1977-04-20 1986-01-30 Condor-Werk Gebr. Frede KG Elektro- und Maschinenfabrik, 4722 Ennigerloh Method and device for the production of the primary winding of summation current transformers in multi-phase execution

Also Published As

Publication number Publication date
GB2018522B (en) 1982-10-06
IT7921530A0 (en) 1979-04-03
FR2423043A1 (en) 1979-11-09
IT1112047B (en) 1986-01-13
DE7810616U1 (en) 1979-09-20
FR2423043B1 (en) 1982-02-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930406