GB392942A - Improvements in or relating to earthing reactances - Google Patents
Improvements in or relating to earthing reactancesInfo
- Publication number
- GB392942A GB392942A GB3284831A GB3284831A GB392942A GB 392942 A GB392942 A GB 392942A GB 3284831 A GB3284831 A GB 3284831A GB 3284831 A GB3284831 A GB 3284831A GB 392942 A GB392942 A GB 392942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- reactance
- coils
- leg
- coil
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
- G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
- G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
- G10K1/063—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated the sounding member being a bell
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
392,942. Protective arrangements. HANSELL, J. B., 121, Eccles Old Road, Pendleton, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Nov. 26, 1931, No. 32848. [Class 38 (iv).] An arrangement for earthing the neutral point of a polyphase system comprises a single - phase reactance coil connected between the neutral point 2 and earth, and an auxiliary reactance 10 which can be connected at will across a secondary winding 6 interlinking the magnetic circuit of the reactance coil 1, or across part of this reactance coil itself. The windings 6, 10 are tapped so that the ratio of the turns connected may be varied while the actual number of turns between the neutral point and earth remains constant. The windings 1, 6 may be connected in series as shown in Fig. 3. The coils 1, 6, 10 may be carried on a common core structure, for example a four-legged core having two inner legs provided with air gaps and two outer legs of half the sectional area of the inner legs, the coils 1, 6 being arranged on one of the inner legs and the coil 10 on the other. 'Alternatively a three-legged core may have the coils 1, 6 on one leg of the core, which leg is provided with air gaps, the winding 10 being wound on a second leg. In a modification, the auxiliary reactance coil 10 may be wound on a magnetic core with air gaps and arranged as a structure separate from the core of the reactance 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL74059D NL74059C (en) | 1931-11-26 | ||
| GB3284831A GB392942A (en) | 1931-11-26 | 1931-11-26 | Improvements in or relating to earthing reactances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3284831A GB392942A (en) | 1931-11-26 | 1931-11-26 | Improvements in or relating to earthing reactances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB392942A true GB392942A (en) | 1933-05-26 |
Family
ID=10344895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3284831A Expired GB392942A (en) | 1931-11-26 | 1931-11-26 | Improvements in or relating to earthing reactances |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB392942A (en) |
| NL (1) | NL74059C (en) |
-
0
- NL NL74059D patent/NL74059C/xx active
-
1931
- 1931-11-26 GB GB3284831A patent/GB392942A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL74059C (en) |
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