GB393589A - Improvements in or relating to power factor measuring instruments - Google Patents
Improvements in or relating to power factor measuring instrumentsInfo
- Publication number
- GB393589A GB393589A GB3364131A GB3364131A GB393589A GB 393589 A GB393589 A GB 393589A GB 3364131 A GB3364131 A GB 3364131A GB 3364131 A GB3364131 A GB 3364131A GB 393589 A GB393589 A GB 393589A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- coils
- coil
- power factor
- series
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Abstract
393,589. Power-factor measurements. ELLIOTT BROS. (LONDON), Ltd., Century Works, Lewisham, London, and SHOTTER, G. F., 14, The Ridgeway, Friern Barnet, Middlesex. Dec. 4, 1931, No. 33641. [Class 37.] A power factor meter has a series winding in the field of which move two coils connected to a pointer, one coil being connected across the supply and the other fed with a current displaced 90 degrees from that of the voltage coil, and means for varying the current in the two coils to give zero deflection. The series coil 4 is wound in two portions on projecting poles 2, 3, the coils 8, 9 embracing a fixed core-piece 7. The ends of each coil 8, 9 are connected to opposite ends of a potentiometer resistance 13 and to its slider 19, one of the coils being connected through a resistance 18 and the other through a condenser 21 or reactance. A reversing switch 20 is located in the circuit of coil 9. The resistance 13 is connected across the supply in series with a zero fine-adjusting resistance 16 and a current limiting resistance 17. The resistance 17 may be replaced by a reactance or condenser to reduce the voltage applied to the potentiometer. Each of the coils 8, 9 may be connected to separate potentiometers. The components are carried on the underside of a panel mounted in a casing, the position of the slider after the zero balance being a measure of the power factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3364131A GB393589A (en) | 1931-12-04 | 1931-12-04 | Improvements in or relating to power factor measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3364131A GB393589A (en) | 1931-12-04 | 1931-12-04 | Improvements in or relating to power factor measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB393589A true GB393589A (en) | 1933-06-06 |
Family
ID=10355543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3364131A Expired GB393589A (en) | 1931-12-04 | 1931-12-04 | Improvements in or relating to power factor measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB393589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519071A (en) * | 1948-06-17 | 1950-08-15 | Gen Electric | Hook-on power-factor indicator |
-
1931
- 1931-12-04 GB GB3364131A patent/GB393589A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519071A (en) * | 1948-06-17 | 1950-08-15 | Gen Electric | Hook-on power-factor indicator |
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