GB271443A - Improvements relating to indicating systems for dynamo-electric machines adapted to be connected to a common bus-bar - Google Patents
Improvements relating to indicating systems for dynamo-electric machines adapted to be connected to a common bus-barInfo
- Publication number
- GB271443A GB271443A GB12079/27A GB1207927A GB271443A GB 271443 A GB271443 A GB 271443A GB 12079/27 A GB12079/27 A GB 12079/27A GB 1207927 A GB1207927 A GB 1207927A GB 271443 A GB271443 A GB 271443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switches
- relay
- bar
- closed
- lamp
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
271,443. British Thomson-Houston Co., Ltd., (Assignees of Finney, A. C.). May 21, 1926, [Convention date]. Protective arrangements.-A green lamp 27 is illuminated when none of the alternating current generators 3 - - 6 is connected to the bus-bar 7, and a red lamp 22 is illuminated when two or more of the generators are connected by their associated switches 13 - - 16 to this bus-bar. The generators are connected to the supply bus-bar 9 through switches 8, only one phase being shown, and the bus-bar 7 is the earthed neutral, it being desirable to have not more than one generator connected thereto because of the possibility of circulating currents, especially those of triple frequency. When all the switches 13 - - 16 are open, the associated series connected contacts 12 are bridged and the lamp 27 is illuminated from a supply 23. Closure of any switch breaks the circuit, and completes another at the associated contacts 17 through a resistance 26 and coil 19 of a differential relay, but the current through this coil is insufficient to cause movement of the relay. However, if two or more of the switches 13 -- 16 are closed, then a corresponding number of resistances 26 are connected in parallel, and consequently the current through the coil 19 is increased sufficiently to cause closure of the relay contacts 20, 21 and the illumination of the lamp 22. In a modification the contacts 12 are omitted and the relay is provided with centering springs, so that with no switches closed, one relay contact is closed to illuminate the green lamp and' also ring a bell, with two switches closed the relay is centred, and with more than two another contact is closed to illuminate the red lamp and ring another bell.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US271443XA | 1926-05-21 | 1926-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB271443A true GB271443A (en) | 1927-08-04 |
Family
ID=21835954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12079/27A Expired GB271443A (en) | 1926-05-21 | 1927-05-05 | Improvements relating to indicating systems for dynamo-electric machines adapted to be connected to a common bus-bar |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB271443A (en) |
-
1927
- 1927-05-05 GB GB12079/27A patent/GB271443A/en not_active Expired
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