GB902822A - Improvements relating to protective arrangements for electrical supply circuits - Google Patents
Improvements relating to protective arrangements for electrical supply circuitsInfo
- Publication number
- GB902822A GB902822A GB149059A GB149059A GB902822A GB 902822 A GB902822 A GB 902822A GB 149059 A GB149059 A GB 149059A GB 149059 A GB149059 A GB 149059A GB 902822 A GB902822 A GB 902822A
- Authority
- GB
- United Kingdom
- Prior art keywords
- source
- circuit
- supply source
- protective
- electrical supply
- 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
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
902,822. Protective arrangements. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. Dec. 17, 1959 [Jan. 15, 1959], No. 1490/59. Class 38 (4). An under or over voltage protective circuit comprises an electronic circuit-breaker device 16 which disconnects a load 13 from a supply source 10 when the source voltage exceeds a determined relationship with a reference source 28. The device 16 may be a transistor which is switched by a two-state electronic circuit comprising valves or transistors 17, 18, 21 arranged to normally maintain the device 16 conducting. The device 16 may alternatively operate a relay with contacts in the load circuit. The source 28 may be a large capacitor fed from the supply source through a high resistance (see Fig. 2, not shown), so that the reference source has a value equal to the average voltage of the supply source. The two state circuit may embody semi-conductor four electrode devices or double base diodes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB149059A GB902822A (en) | 1959-01-15 | 1959-01-15 | Improvements relating to protective arrangements for electrical supply circuits |
| FR815621A FR1245264A (en) | 1959-01-15 | 1960-01-14 | Protection system for electrical circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB149059A GB902822A (en) | 1959-01-15 | 1959-01-15 | Improvements relating to protective arrangements for electrical supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB902822A true GB902822A (en) | 1962-08-09 |
Family
ID=9722915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB149059A Expired GB902822A (en) | 1959-01-15 | 1959-01-15 | Improvements relating to protective arrangements for electrical supply circuits |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1245264A (en) |
| GB (1) | GB902822A (en) |
-
1959
- 1959-01-15 GB GB149059A patent/GB902822A/en not_active Expired
-
1960
- 1960-01-14 FR FR815621A patent/FR1245264A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1245264A (en) | 1960-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB753014A (en) | Semiconductor electric signal translating devices | |
| ES346726A1 (en) | Overload protection circuit | |
| GB1196186A (en) | Controllable Voltage Sources | |
| GB1330287A (en) | Transient voltage protection circuit | |
| GB728740A (en) | Improvements in or relating to trigger circuits | |
| GB792120A (en) | Improvements in circuits employing semi-conductor devices | |
| GB1022964A (en) | Circuit breakers | |
| GB902822A (en) | Improvements relating to protective arrangements for electrical supply circuits | |
| GB916475A (en) | Improvements in or relating to electrical circuits employing semi-conductor devices | |
| GB925027A (en) | A protective circuit arrangement for transistors | |
| GB840907A (en) | Improvements in or relating to quick-acting cut-out devices | |
| GB1062854A (en) | Improvements in circuits for protecting electrical power sources | |
| GB933667A (en) | A transistorized loading circuit | |
| GB994458A (en) | Improvements relating to circuit arrangements employing semi-conductor diodes | |
| GB993904A (en) | Bistable transistor circuit | |
| US3137797A (en) | Electrical switching for selection lines of a memory circuit | |
| GB1000833A (en) | Current limiting networks | |
| GB926762A (en) | An arrangement for controlling switching transistors | |
| GB799881A (en) | Bi-stable transistor circuit | |
| GB896547A (en) | Constant power dissipating transistor circuit | |
| GB872433A (en) | Improvements in or relating to bistable flip-flop circuits and relay circuit arrangements incorporating such circuits | |
| ES275254A1 (en) | Multiple function circuit | |
| GB958573A (en) | Improvements in or relating to switching transistor arrangements for electrical supply circuits | |
| GB907414A (en) | Electric protective circuits | |
| GB900236A (en) | Improvements in protective circuits for transistor equipment |