GB688720A - Improvements in or relating to an arrangement for breaking direct current high tension circuits - Google Patents
Improvements in or relating to an arrangement for breaking direct current high tension circuitsInfo
- Publication number
- GB688720A GB688720A GB26312/50A GB2631250A GB688720A GB 688720 A GB688720 A GB 688720A GB 26312/50 A GB26312/50 A GB 26312/50A GB 2631250 A GB2631250 A GB 2631250A GB 688720 A GB688720 A GB 688720A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- switch
- valve
- zero
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
Abstract
688,720. Arc-rupturing in switches. SIEMENS & HALSKE AKT.-GES. Oct. 27,1950 [Oct. 29 1949; Aug. 7, 1950], No. 26312/50. Class 38 (v) An arrangement for breaking a high-tension D.C. circuit consists in superimposing on section of the line an alternating current derived from the direct current to cause a periodic resultant current flow through zero, and then in opening the line automatically at zero current by a switch or discharge valve. A D.C. source 1, Fig. 1, supplies through lines 3 a consumer 2. To interrupt the circuit a lowpower switch 4 is opened to divert the load current through a circuit comprising a discharge valve 6, Poulsen arc generator 13, 14, and an inductance 8. The arc generator 13, 14, generates A.C. in an oscillatory circuit 17, 18, upon separation of auxiliary valve 6 is reduced to zero and the valve discharge electrodes 15, 16, whereby the current through the ceases and the circuit interruption is effected. A further valve 7 is preferably provided to prevent premature interruption of the oscillations. The frequency of the A.C. is sufficiently low, e.g. 200 cycles/sec., to permit de-ionisation of the valves and prevent recurrence of the discharge. The inductance 8 prevents interference by the A.C. of the D.C. circuit. To ensure that the switch 4 opens on a low voltage, the valves 6, 7, may have low voltage starting electrodes which are initially connected in circuit through a switch 71. Additional valves 19, Fig. 2, may be provided, which are made conducting only when circuit interruption is required, to separate the oscillatory circuit 17, 18, from the D.C. high tension when switch 4 is open. Valve 7 and one of the valves 19 may be structurally united and have a common cathode 197. In order to limit the D.C. to a value which can be reduced to zero by the A.C., e.g. in the case of a short-circuit, a resistance 20 may be connected in circuit by a switch 21; also the appropriate amount of resistance may be automatically connected in by relays.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE290716X | 1949-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB688720A true GB688720A (en) | 1953-03-11 |
Family
ID=6063784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26312/50A Expired GB688720A (en) | 1949-10-29 | 1950-10-27 | Improvements in or relating to an arrangement for breaking direct current high tension circuits |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH290716A (en) |
| FR (1) | FR1028127A (en) |
| GB (1) | GB688720A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1175319B (en) * | 1961-09-28 | 1964-08-06 | Siemens Ag | Switches with contacts connected in series |
| US3237030A (en) * | 1962-09-28 | 1966-02-22 | Dynamics Controls Corp | Radio noise-free switch |
| US3293496A (en) * | 1962-02-14 | 1966-12-20 | Bbc Brown Boveri & Cie | Switching device for interruption of alternating current |
-
1950
- 1950-10-23 CH CH290716D patent/CH290716A/en unknown
- 1950-10-27 GB GB26312/50A patent/GB688720A/en not_active Expired
- 1950-10-30 FR FR1028127D patent/FR1028127A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1175319B (en) * | 1961-09-28 | 1964-08-06 | Siemens Ag | Switches with contacts connected in series |
| US3293496A (en) * | 1962-02-14 | 1966-12-20 | Bbc Brown Boveri & Cie | Switching device for interruption of alternating current |
| US3237030A (en) * | 1962-09-28 | 1966-02-22 | Dynamics Controls Corp | Radio noise-free switch |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1028127A (en) | 1953-05-19 |
| CH290716A (en) | 1953-05-15 |
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