GB615888A - Improvements in and relating to apparatus for detecting short circuited turns in coils for electrical apparatus - Google Patents
Improvements in and relating to apparatus for detecting short circuited turns in coils for electrical apparatusInfo
- Publication number
- GB615888A GB615888A GB18271/44A GB1827144A GB615888A GB 615888 A GB615888 A GB 615888A GB 18271/44 A GB18271/44 A GB 18271/44A GB 1827144 A GB1827144 A GB 1827144A GB 615888 A GB615888 A GB 615888A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- indicator
- under test
- short
- oscillator
- 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
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
615,888. Detecting faults. BRITISH THOMSON-HOUSTON CO., Ltd., DARKE, L., and TITLEY, C. O. Sept. 25, 1944, No. 18271. [Class 37] Short-circuited turns in an electrical coil are detected by arranging the coil in a series resonant circuit fed from a high - frequency source to provide a sensitive state in which the effect of a short-circuit will be great. In Fig. 1, coil L2 forms the grid circuit of a valve T, the anode of which is connected to earth through a coil L1 under test in series with a condenser C. An indicator 1 is connected to a coupling coil L4 which is held near the end of the coil under test L1. Coils L2, L1 have a slight magnetic coupling which is adjusted so that, with a standard coil in position L1, a stable oscillation is obtained as shown by indicator 1. The coil under test is substituted for standard L1 when any short-circuited turns will prevent oscillation. In a modification, Fig. 2, the coil L1 under test is connected in series with a condenser C, across the output of a separate oscillator connected at AA. The oscillator is adjustable as to frequency and amplitude, the output being measured by voltmeter V. Indicator 1 is connected to coupling coil L4. The oscillator is tuned to the resonant frequency of L1, C, with a standard coil in position L1. The reading of indicator 1 is noted with the oscillator voltage V adjusted to some arbitrary level. The coils under test are substituted for the standard coil LI, and any short-circuited turns cause a drop in the reading on indicator 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18271/44A GB615888A (en) | 1944-09-25 | 1944-09-25 | Improvements in and relating to apparatus for detecting short circuited turns in coils for electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18271/44A GB615888A (en) | 1944-09-25 | 1944-09-25 | Improvements in and relating to apparatus for detecting short circuited turns in coils for electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615888A true GB615888A (en) | 1949-01-13 |
Family
ID=10109581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18271/44A Expired GB615888A (en) | 1944-09-25 | 1944-09-25 | Improvements in and relating to apparatus for detecting short circuited turns in coils for electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB615888A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1178939B (en) * | 1962-11-28 | 1964-10-01 | Standard Elektrik Lorenz Ag | Continuity tester with a transistor oscillator |
-
1944
- 1944-09-25 GB GB18271/44A patent/GB615888A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1178939B (en) * | 1962-11-28 | 1964-10-01 | Standard Elektrik Lorenz Ag | Continuity tester with a transistor oscillator |
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