GB672045A - Improvements relating to electricity meters - Google Patents
Improvements relating to electricity metersInfo
- Publication number
- GB672045A GB672045A GB233450A GB233450A GB672045A GB 672045 A GB672045 A GB 672045A GB 233450 A GB233450 A GB 233450A GB 233450 A GB233450 A GB 233450A GB 672045 A GB672045 A GB 672045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- coils
- voltage
- star point
- responsively
- 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
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/36—Induction meters, e.g. Ferraris meters
- G01R11/40—Induction meters, e.g. Ferraris meters for polyphase operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
672,045. Supply meters. MEASUREMENT, Ltd. Jan. 4, 1951 [Jan. 30, 1950], No. 2334/50. Class 37. [Also in Group XXXVII] In a polyphase electricity meter, Fig. 2, a voltage-coil fault detector lamp d is connected between the star point e of -the voltage coils a, b, c and the neutral line N. In the event of an open-circuited voltage coil the lamp d will light up responsively to an out-of-balance. current flow between the star point e and neutral line N. To test the. continuity of lamp d a push-button is operated to close. contacts g and open contacts f whereby voltage coil c is transferred from the star point e to the neutral N and the lamp d if sound will then light up responsively to the vector sum of the currents in coils a and b. In a modification, Fig. 1, the continuity of the lamp d is tested by utilizing a dummy impedance z and a pushbutton s across one of the coils. A protective resistor r is incorporated in parallel with the lamp d as shown, Fig. 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB233450A GB672045A (en) | 1950-01-30 | 1950-01-30 | Improvements relating to electricity meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB233450A GB672045A (en) | 1950-01-30 | 1950-01-30 | Improvements relating to electricity meters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672045A true GB672045A (en) | 1952-05-14 |
Family
ID=9737711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB233450A Expired GB672045A (en) | 1950-01-30 | 1950-01-30 | Improvements relating to electricity meters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB672045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1079193B (en) * | 1953-06-25 | 1960-04-07 | Merlein & Gerin Sa Ets | Device for measuring and monitoring the insulation status of an ungrounded three-phase system |
| WO2010081280A1 (en) * | 2009-01-13 | 2010-07-22 | 中国计量科学研究院 | Three-phase electric energy measurement apparatus |
-
1950
- 1950-01-30 GB GB233450A patent/GB672045A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1079193B (en) * | 1953-06-25 | 1960-04-07 | Merlein & Gerin Sa Ets | Device for measuring and monitoring the insulation status of an ungrounded three-phase system |
| WO2010081280A1 (en) * | 2009-01-13 | 2010-07-22 | 中国计量科学研究院 | Three-phase electric energy measurement apparatus |
| US8823359B2 (en) | 2009-01-13 | 2014-09-02 | National Institute Of Metrology P.R. China | Three-phase electric energy measurement apparatus |
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