GB735755A - Improvements in and relating to the protection of electrical circuits - Google Patents
Improvements in and relating to the protection of electrical circuitsInfo
- Publication number
- GB735755A GB735755A GB776552A GB776552A GB735755A GB 735755 A GB735755 A GB 735755A GB 776552 A GB776552 A GB 776552A GB 776552 A GB776552 A GB 776552A GB 735755 A GB735755 A GB 735755A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- march
- series
- contactor
- relating
- 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
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
Landscapes
- Protection Of Generators And Motors (AREA)
Abstract
735,755. Protective cut-out arrangements. BRITISH THOMSON-HOUSTON CO., Ltd. March 5, 1953 [March 26, 1952], No. 7765/52. Class 38 (5). The winding M of a motor or transformer is protected from overheating by means of a negative temperature coefficient resistor 2A embedded therein and connected in series with a relay coil 2 so as to open contacts 2C in the circuit of the contactor winding 1A. The latter is energized on the depression of a push button 3 and maintained energized by auxiliary contacts 1<SP>1</SP> closed by the contactor. In Fig. 2 (not shown) two or more resistors embedded in different parts of the winding are connected in parallel (or series) with one another to the relay coil. Specification 593,066 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB776552A GB735755A (en) | 1952-03-26 | 1952-03-26 | Improvements in and relating to the protection of electrical circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB776552A GB735755A (en) | 1952-03-26 | 1952-03-26 | Improvements in and relating to the protection of electrical circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB735755A true GB735755A (en) | 1955-08-31 |
Family
ID=9839285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB776552A Expired GB735755A (en) | 1952-03-26 | 1952-03-26 | Improvements in and relating to the protection of electrical circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB735755A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2999188A (en) * | 1958-09-04 | 1961-09-05 | Gen Electric | Fail-safe overload protective system |
US3032690A (en) * | 1959-02-20 | 1962-05-01 | Cutler Hammer Inc | Thermally responsive electrical control systems |
US3036242A (en) * | 1958-06-17 | 1962-05-22 | Westinghouse Electric Corp | Overtemperature protected apparatus |
US3042837A (en) * | 1958-11-17 | 1962-07-03 | Gen Electric | Fail safe overload protective system |
US3065381A (en) * | 1959-11-30 | 1962-11-20 | Westinghouse Electric Corp | Safety control circuits for the motors of hermetically sealed refrigerant compressors |
US3064444A (en) * | 1959-11-30 | 1962-11-20 | Westinghouse Electric Corp | Safety control circuits for the motors of refrigerant compressors |
US3079524A (en) * | 1957-08-21 | 1963-02-26 | Westinghouse Electric Corp | Protector for dynamoelectric machines |
US3156849A (en) * | 1959-03-16 | 1964-11-10 | Texas Instruments Inc | Circuit-breaking apparatus |
US3172011A (en) * | 1959-03-18 | 1965-03-02 | Texas Instruments Inc | Electrical circuit control apparatus |
WO2007003451A1 (en) * | 2005-06-30 | 2007-01-11 | Robert Bosch Gmbh | Protective circuit and method for monitoring the temperature of a dropping resistor |
-
1952
- 1952-03-26 GB GB776552A patent/GB735755A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3079524A (en) * | 1957-08-21 | 1963-02-26 | Westinghouse Electric Corp | Protector for dynamoelectric machines |
US3155878A (en) * | 1957-08-21 | 1964-11-03 | Westinghouse Electric Corp | Protector for dynamoelectric machines |
US3036242A (en) * | 1958-06-17 | 1962-05-22 | Westinghouse Electric Corp | Overtemperature protected apparatus |
US2999188A (en) * | 1958-09-04 | 1961-09-05 | Gen Electric | Fail-safe overload protective system |
US3042837A (en) * | 1958-11-17 | 1962-07-03 | Gen Electric | Fail safe overload protective system |
US3032690A (en) * | 1959-02-20 | 1962-05-01 | Cutler Hammer Inc | Thermally responsive electrical control systems |
US3156849A (en) * | 1959-03-16 | 1964-11-10 | Texas Instruments Inc | Circuit-breaking apparatus |
US3172011A (en) * | 1959-03-18 | 1965-03-02 | Texas Instruments Inc | Electrical circuit control apparatus |
US3065381A (en) * | 1959-11-30 | 1962-11-20 | Westinghouse Electric Corp | Safety control circuits for the motors of hermetically sealed refrigerant compressors |
US3064444A (en) * | 1959-11-30 | 1962-11-20 | Westinghouse Electric Corp | Safety control circuits for the motors of refrigerant compressors |
WO2007003451A1 (en) * | 2005-06-30 | 2007-01-11 | Robert Bosch Gmbh | Protective circuit and method for monitoring the temperature of a dropping resistor |
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