GB2018522A - Transformer - Google Patents
TransformerInfo
- 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
Links
- 239000004020 conductor Substances 0.000 abstract 3
- 230000006735 deficit Effects 0.000 abstract 1
- 239000004922 lacquer Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
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>
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)
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 |
-
1978
- 1978-04-10 DE DE19787810616U patent/DE7810616U1/en not_active Expired
-
1979
- 1979-02-28 FR FR7905290A patent/FR2423043A1/en active Granted
- 1979-04-03 IT IT21530/79A patent/IT1112047B/en active
- 1979-04-06 GB GB7912278A patent/GB2018522B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2423043B1 (en) | 1982-02-19 |
GB2018522B (en) | 1982-10-06 |
IT1112047B (en) | 1986-01-13 |
FR2423043A1 (en) | 1979-11-09 |
IT7921530A0 (en) | 1979-04-03 |
DE7810616U1 (en) | 1979-09-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930406 |