GB873121A - Improvements in or relating to overtemperature protective systems for electrical apparatus - Google Patents

Improvements in or relating to overtemperature protective systems for electrical apparatus

Info

Publication number
GB873121A
GB873121A GB19503/59A GB1950359A GB873121A GB 873121 A GB873121 A GB 873121A GB 19503/59 A GB19503/59 A GB 19503/59A GB 1950359 A GB1950359 A GB 1950359A GB 873121 A GB873121 A GB 873121A
Authority
GB
United Kingdom
Prior art keywords
relay
circuit
contactor
june
contacts
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
GB19503/59A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB873121A publication Critical patent/GB873121A/en
Expired legal-status Critical Current

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
    • H02H7/08—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 motors
    • H02H7/085—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 motors against excessive load
    • H02H7/0852—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 motors against excessive load directly responsive to abnormal temperature by using a temperature sensor

Landscapes

  • Protection Of Generators And Motors (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

873,121. Protective cut-out arrangements; control of motors. WESTINGHOUSE ELECTRIC CORPORATION. June 8, 1959 [June 17, 1958], No. 19503/59. Classes 38 (3) and 38 (5). A protective system for an apparatus, such as a dynamo-electric machine, comprises a temperature-sensitive resistance element 24 embedded in a current-carrying winding 30 of the apparatus and connected in series with an A.C. supply 48, the operating coil 46 of a D.C. relay 45, and a rectifier 49. The element 24 has a positive temperature coefficient and under normal conditions the relay coil 46 is sufficiently energized to maintain closed its contacts 44 in the circuit of a contactor operating coil 36. In the event of overheating, the resistance of the element 24 increases suddenly causing the relay to open the contactor operating circuit. Should the system fail due to a short-circuit between leads 52, 53, the high impedance of the relay to alternating current results in the opening of the contacts 44 and the opening of the contactor. Specification 865,649 is referred to.
GB19503/59A 1958-06-17 1959-06-08 Improvements in or relating to overtemperature protective systems for electrical apparatus Expired GB873121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US742667A US3036242A (en) 1958-06-17 1958-06-17 Overtemperature protected apparatus

Publications (1)

Publication Number Publication Date
GB873121A true GB873121A (en) 1961-07-19

Family

ID=24985751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19503/59A Expired GB873121A (en) 1958-06-17 1959-06-08 Improvements in or relating to overtemperature protective systems for electrical apparatus

Country Status (3)

Country Link
US (1) US3036242A (en)
FR (1) FR1227669A (en)
GB (1) GB873121A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439226A (en) * 1966-05-12 1969-04-15 American Standard Inc Fail-safe differential temperature control system
GB2275351A (en) * 1993-02-17 1994-08-24 Pitney Bowes Inc Motor speed controller

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209206A (en) * 1962-02-09 1965-09-28 Westinghouse Electric Corp Overtemperature protected apparatus
CA747514A (en) * 1962-04-06 1966-11-29 Westinghouse Electric Corporation Overtemperature protected apparatus
US3205405A (en) * 1962-08-08 1965-09-07 Carrier Corp Over-temperature protection system for a dynamoelectric machine
US3280373A (en) * 1962-09-06 1966-10-18 Carrier Corp Over-temperature protection system having means for simulating the temperature rise rate of a dynamoelectric machine and winding
US3324352A (en) * 1963-06-03 1967-06-06 Tecumseh Products Co Temperature protection circuit
DE1289172B (en) * 1963-06-13 1969-02-13 Licentia Gmbh Arrangement to protect electrical consumers against excess temperatures
US3899726A (en) * 1973-08-31 1975-08-12 Allister Mfg Co Automatic reversing control equipment
EP0068780B1 (en) * 1981-06-22 1986-12-30 Raychem Limited Improvements in or relating to dimensionally-recoverable articles
US10371739B2 (en) * 2015-10-30 2019-08-06 Landis+Gyr Llc Arrangement for detecting a meter maintenance condition using winding resistance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE522731A (en) *
US2150071A (en) * 1934-06-21 1939-03-07 Lincoln Electric Co Dynamo-electric machine control
US2106100A (en) * 1936-10-08 1938-01-18 Gen Electric Circuit controlling means
US2283706A (en) * 1941-05-27 1942-05-19 Gen Electric Protective system and device
US2446474A (en) * 1945-04-18 1948-08-03 Gen Motors Corp Motor protective switching system
US2681429A (en) * 1951-03-20 1954-06-15 John E Long Electrical circuit for discharge tubes
US2758255A (en) * 1951-11-24 1956-08-07 Garrett Corp Polyphase motor protector
GB735755A (en) * 1952-03-26 1955-08-31 British Thomson Houston Co Ltd Improvements in and relating to the protection of electrical circuits
US2721993A (en) * 1952-11-25 1955-10-25 Fox Prod Co Signal means for battery chargers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439226A (en) * 1966-05-12 1969-04-15 American Standard Inc Fail-safe differential temperature control system
GB2275351A (en) * 1993-02-17 1994-08-24 Pitney Bowes Inc Motor speed controller

Also Published As

Publication number Publication date
US3036242A (en) 1962-05-22
FR1227669A (en) 1960-08-22

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