GB735755A - Improvements in and relating to the protection of electrical circuits - Google Patents

Improvements in and relating to the protection of electrical circuits

Info

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
Application number
GB776552A
Inventor
Eric Harry Burnage Martin
John Ansley Watson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB776552A priority Critical patent/GB735755A/en
Publication of GB735755A publication Critical patent/GB735755A/en
Expired legal-status Critical Current

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.
GB776552A 1952-03-26 1952-03-26 Improvements in and relating to the protection of electrical circuits Expired GB735755A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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