GB1021705A - Improvements in circuit protection systems - Google Patents
Improvements in circuit protection systemsInfo
- Publication number
- GB1021705A GB1021705A GB1894364A GB1894364A GB1021705A GB 1021705 A GB1021705 A GB 1021705A GB 1894364 A GB1894364 A GB 1894364A GB 1894364 A GB1894364 A GB 1894364A GB 1021705 A GB1021705 A GB 1021705A
- Authority
- GB
- United Kingdom
- Prior art keywords
- generator
- circuit
- comparator
- regulator circuit
- analogue
- 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
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
- H02H7/065—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors against excitation faults
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
1, 021, 705. Automatic voltage control. MULLARD Ltd. Dec. 3, 1964 [May 6, 1964], No. 18943/64. Heading G3R. [Also in Division H2] A protective arrangement for a generator comprises an analogue of the regulator circuit of the generator, the analogue circuit and the regulator circuit being connected in parallel and each supplying an input to a comparator which produces an output signal if the input signals differ by more than a predetermined amount, the output signal being arranged to trip the generator or to operate fault indication apparatus. As shown, the output of a generator 1 is compared with a reference voltage source 4 in a comparator 5, the resulting error signal being applied over amplifiers 6, 7 to regulate the current in the generator field 2. The error signal is also applied, by way of a current sensing device 21, to a comparator 20, which also receives an input from a circuit 14, 15, 16, 17 which is an analogue of the regulator circuit 4, 5, 6, 7 and which is connected in parallel with the regulator circuit. If a fault should develop in the regulator circuit the inputs to comparator 20 will differ, and the resulting output from 20 will trip the generator. The protective circuit may be duplicated, and the advantages of the system when used in association with generators operating in parallel are discussed in the specification. The system may be used in conjunction with the usual over-voltage, under-voltage, and earth-fault protection circuits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1894364A GB1021705A (en) | 1964-05-06 | 1964-05-06 | Improvements in circuit protection systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1894364A GB1021705A (en) | 1964-05-06 | 1964-05-06 | Improvements in circuit protection systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1021705A true GB1021705A (en) | 1966-03-09 |
Family
ID=10121119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1894364A Expired GB1021705A (en) | 1964-05-06 | 1964-05-06 | Improvements in circuit protection systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1021705A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168211A (en) * | 1984-11-19 | 1986-06-11 | Nissan Motor | Electrical load condition determining apparatus |
-
1964
- 1964-05-06 GB GB1894364A patent/GB1021705A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168211A (en) * | 1984-11-19 | 1986-06-11 | Nissan Motor | Electrical load condition determining apparatus |
US4661717A (en) * | 1984-11-19 | 1987-04-28 | Nissan Motor Co., Ltd. | Load condition determining apparatus |
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