GB602738A - Improvements relating to electrical measuring instruments - Google Patents
Improvements relating to electrical measuring instrumentsInfo
- Publication number
- GB602738A GB602738A GB451045A GB451045A GB602738A GB 602738 A GB602738 A GB 602738A GB 451045 A GB451045 A GB 451045A GB 451045 A GB451045 A GB 451045A GB 602738 A GB602738 A GB 602738A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- voltage
- tube
- depression
- button
- 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
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
602,738. Resistance measurements. ENGLISH ELECTRIC CO., Ltd., DOUGHTY, E. H., and WARDLE, L. G. Feb. 22, 1945. No. No. 4510. [Class 37] In an arrangement for measuring a small current passing through a high resistance, e.g. the leakage current through an insulator R1, a selected known resistance R2 is connected in series with R1 across a high voltage source T1, T2. On depression of a push-button B, the voltage drop across resistance R2 is connected in series opposition with a measured source of voltage P2 across the grid resistance R4 of a " magic eye " tube V2 which is normally in a " partially-open '' condition. P2 is adjusted until the depression of button B causes no change in the condition of the tube V2 when the voltage across R2 is the same as that taken from potentiometer P2. Hence, the current through resistance R1 is known and its resistance may be calculated. A neon tube V1 is arranged to shunt R2 in case of the breakdown of the high resistance R1. Condensers C1, C2 are smoothing condensers used when the direct current sources are derived from rectifiers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB451045A GB602738A (en) | 1945-02-22 | 1945-02-22 | Improvements relating to electrical measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB451045A GB602738A (en) | 1945-02-22 | 1945-02-22 | Improvements relating to electrical measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB602738A true GB602738A (en) | 1948-06-02 |
Family
ID=9778562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB451045A Expired GB602738A (en) | 1945-02-22 | 1945-02-22 | Improvements relating to electrical measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB602738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970325A (en) * | 2017-05-15 | 2017-07-21 | 中国大唐集团科学技术研究院有限公司华东分公司 | The generator manually wound insulation reversal connection ray detection device and method measured in high potential |
-
1945
- 1945-02-22 GB GB451045A patent/GB602738A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970325A (en) * | 2017-05-15 | 2017-07-21 | 中国大唐集团科学技术研究院有限公司华东分公司 | The generator manually wound insulation reversal connection ray detection device and method measured in high potential |
| CN106970325B (en) * | 2017-05-15 | 2024-04-02 | 中国大唐集团科学技术研究院有限公司华东分公司 | Generator handbag insulation reverse wiring inspection device and method for high potential measurement |
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