GB272020A - Improvements in apparatus for the control of dynamo electric machines - Google Patents
Improvements in apparatus for the control of dynamo electric machinesInfo
- Publication number
- GB272020A GB272020A GB1193626A GB1193626A GB272020A GB 272020 A GB272020 A GB 272020A GB 1193626 A GB1193626 A GB 1193626A GB 1193626 A GB1193626 A GB 1193626A GB 272020 A GB272020 A GB 272020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- circuit
- overload
- spring
- switching
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
Landscapes
- Motor And Converter Starters (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
272,020. English Electric Co., Ltd., and Bolton, R. A. R. May 7, 1926. Switching systems.-A rotary converter, transformer &c. 1 supplying a circuit 2, is relieved of a 20 to 100 per cent overload when hot by the switching in of an additional machine, by the inclusion of a resistance in the load circuit, or by the switching out of the machine itself. A current transformer 4 supplies a liquid thermal device 6, having characteristic similar to the machine, so that, when' the machine heats up, a member 14 rises, firstly compressing a, spring 37 and thereafter releasing a, pivoted catch 29, so that a contact 25 is moved to bridge fixed contacts 9. Similarly, when the device cools down, the member 14 is forced down by a spring 41; spring 38 and catch 30 functioning to give a quick break. An overload relay 8 is included in series with the contacts 9 in the current 10, so that only upon the occurrence of a predetermined overload when the machine is hot, is the circuit 10 completed to cause the starting up of another machine, or the inclusion of a resistance in the circuit 2. Undue heating causes the switch 26 to open, to effect the shutting down of the machine 1. Excessive overloads, such as due to short circuits, are dealt with by another overload device 'having an high setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1193626A GB272020A (en) | 1926-05-07 | 1926-05-07 | Improvements in apparatus for the control of dynamo electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1193626A GB272020A (en) | 1926-05-07 | 1926-05-07 | Improvements in apparatus for the control of dynamo electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB272020A true GB272020A (en) | 1927-06-09 |
Family
ID=9995349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1193626A Expired GB272020A (en) | 1926-05-07 | 1926-05-07 | Improvements in apparatus for the control of dynamo electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB272020A (en) |
-
1926
- 1926-05-07 GB GB1193626A patent/GB272020A/en not_active Expired
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