GB1555214A - Protection device for ac motor circuit - Google Patents

Protection device for ac motor circuit

Info

Publication number
GB1555214A
GB1555214A GB4297/77A GB429777A GB1555214A GB 1555214 A GB1555214 A GB 1555214A GB 4297/77 A GB4297/77 A GB 4297/77A GB 429777 A GB429777 A GB 429777A GB 1555214 A GB1555214 A GB 1555214A
Authority
GB
United Kingdom
Prior art keywords
protection device
motor circuit
motor
circuit
protection
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
GB4297/77A
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.)
Schneider Electric USA Inc
Original Assignee
Square D Co
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
Priority claimed from US05/654,423 external-priority patent/US4048663A/en
Application filed by Square D Co filed Critical Square D Co
Publication of GB1555214A publication Critical patent/GB1555214A/en
Expired legal-status Critical Current

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
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • 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
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
    • 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
    • H02H3/08—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 current
    • H02H3/083—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 current for three-phase systems
    • 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
    • H02H3/08—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 current
    • H02H3/093—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 current with timing means
    • 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
GB4297/77A 1976-02-02 1977-02-02 Protection device for ac motor circuit Expired GB1555214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/654,423 US4048663A (en) 1977-10-10 1976-02-02 Solid state overload relay transformer circuit

Publications (1)

Publication Number Publication Date
GB1555214A true GB1555214A (en) 1979-11-07

Family

ID=24624784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4297/77A Expired GB1555214A (en) 1976-02-02 1977-02-02 Protection device for ac motor circuit

Country Status (6)

Country Link
AU (1) AU515384B2 (en)
DE (1) DE2704337A1 (en)
FR (1) FR2339979A1 (en)
GB (1) GB1555214A (en)
IT (1) IT1085308B (en)
ZA (1) ZA77581B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920055A1 (en) * 1979-05-18 1980-11-27 Barmag Barmer Maschf Motor control system for multiple textile machines - uses summing device between selected phase connections and three phase supply
FR2544352B2 (en) * 1982-12-30 1986-01-24 Esswein Sa LAUNDRY WASHING MACHINE WITH VARIABLE LAUNDRY DEPENDING ON THE RESISTANT TORQUE OPPOSING THE DRUM DRIVE MOTOR
DE3362234D1 (en) * 1982-03-26 1986-04-03 Esswein Sa Clothes washer with a reduced-power motor for driving the drum
DE10148815A1 (en) * 2001-10-02 2003-04-10 Abb Patent Gmbh Method and device for current value determination using a current transformer which works in the area of core saturation
DE102020125923A1 (en) 2020-10-04 2022-04-07 EPA GmbH Absorption filter and method for producing one

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1961686B2 (en) * 1969-12-02 1979-05-31 Siemens Ag, 1000 Berlin Und 8000 Muenchen Overcurrent protection relay circuit for AC network - uses current transformer and full wave rectifier to produce measured and supply voltage from opposite half cycles
DE2150948B2 (en) * 1971-10-13 1975-04-03 Josef Dumser Schaltanlagenbau, 6745 Offenbach Temp.-independent current limiter for three-phase supplies - compares phase-line signal evaluators output with remotely-set reference
GB1459176A (en) * 1972-11-01 1976-12-22 Square D Co Overcurrent protective apparatus for a power circuit
US3846675A (en) * 1973-01-30 1974-11-05 Westinghouse Electric Corp Molded case circuit breakers utilizing saturating current transformers
US3875464A (en) * 1973-10-10 1975-04-01 Westinghouse Electric Corp Solid state overload relay

Also Published As

Publication number Publication date
AU515384B2 (en) 1981-04-02
FR2339979B1 (en) 1984-02-03
AU2951477A (en) 1979-04-26
FR2339979A1 (en) 1977-08-26
DE2704337A1 (en) 1977-08-04
IT1085308B (en) 1985-05-28
ZA77581B (en) 1977-12-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee