GB554135A - Improvements in or relating to arrangements for indicating load variations in alternating current supply systems - Google Patents
Improvements in or relating to arrangements for indicating load variations in alternating current supply systemsInfo
- Publication number
- GB554135A GB554135A GB1633341A GB1633341A GB554135A GB 554135 A GB554135 A GB 554135A GB 1633341 A GB1633341 A GB 1633341A GB 1633341 A GB1633341 A GB 1633341A GB 554135 A GB554135 A GB 554135A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- winding
- arrangements
- relating
- alternating current
- 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
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
554,135. Automatic control systems. STANDARD TELEPHONES & CABLES, Ltd., Mc- WHIRTER, E. M. S., DUNN, R. H., CHAMBERS, C. H., and WARDEN, F. W. Dec. 18, 1941, No. 16333. [Class 38 (iv)] (Also in Group XXXVI] In a means for indicating variations in an A.C. load regardless of variations in supply volts, and employing a transformer with a winding P in series with the load and a shunt winding S normally balanced, as in Specification 547,665, [Group XXXVI], the sense of the variation is indicated by means of a pair of valves V1, V2, the anodes of which are energized in phase with the A.C. supply to the load, whereas the grids are connected to opposite ends of the test winding T and normally biased so the anode current is zero. On load variation, one grid will be positive and the other negative, and one or other relay R1, R2 energized to give the indication or control the current in winding P or S to restore balance. The arrangement is applicable to constant-current control of electric arc furnaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1633341A GB554135A (en) | 1941-12-18 | 1941-12-18 | Improvements in or relating to arrangements for indicating load variations in alternating current supply systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1633341A GB554135A (en) | 1941-12-18 | 1941-12-18 | Improvements in or relating to arrangements for indicating load variations in alternating current supply systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB554135A true GB554135A (en) | 1943-06-22 |
Family
ID=10075397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1633341A Expired GB554135A (en) | 1941-12-18 | 1941-12-18 | Improvements in or relating to arrangements for indicating load variations in alternating current supply systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB554135A (en) |
-
1941
- 1941-12-18 GB GB1633341A patent/GB554135A/en not_active Expired
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