ZA762980B - Phase imbalance detection circuit - Google Patents

Phase imbalance detection circuit

Info

Publication number
ZA762980B
ZA762980B ZA762980A ZA762980A ZA762980B ZA 762980 B ZA762980 B ZA 762980B ZA 762980 A ZA762980 A ZA 762980A ZA 762980 A ZA762980 A ZA 762980A ZA 762980 B ZA762980 B ZA 762980B
Authority
ZA
South Africa
Prior art keywords
detection circuit
phase imbalance
imbalance detection
phase
circuit
Prior art date
Application number
ZA762980A
Other languages
English (en)
Inventor
G Taylor
D Kimmel
W Gary
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 ZA762980B publication Critical patent/ZA762980B/xx

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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • 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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/353—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system involving comparison of phase voltages
ZA762980A 1975-06-02 1976-05-19 Phase imbalance detection circuit ZA762980B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/583,219 US4021703A (en) 1975-06-02 1975-06-02 Phase imbalance detection circuit

Publications (1)

Publication Number Publication Date
ZA762980B true ZA762980B (en) 1977-04-27

Family

ID=24332187

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA762980A ZA762980B (en) 1975-06-02 1976-05-19 Phase imbalance detection circuit

Country Status (14)

Country Link
US (1) US4021703A (xx)
JP (1) JPS5931284B2 (xx)
AU (1) AU500676B2 (xx)
BE (1) BE842349A (xx)
BR (1) BR7603424A (xx)
CA (1) CA1077614A (xx)
CH (1) CH600643A5 (xx)
DE (1) DE2624785A1 (xx)
ES (1) ES448412A1 (xx)
FR (1) FR2313791A1 (xx)
GB (1) GB1552781A (xx)
IT (1) IT1080549B (xx)
SE (1) SE419389B (xx)
ZA (1) ZA762980B (xx)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935309C2 (de) * 1979-08-31 1981-11-26 SIEMENS AG AAAAA, 1000 Berlin und 8000 München Elektromedizinisches Gerät.
US4335413A (en) * 1980-04-15 1982-06-15 Westinghouse Electric Corp. Circuit interrupter with remote indicator and power supply
US4331995A (en) * 1981-02-02 1982-05-25 Diversified Electronics, Inc. Phase unbalance protector
US4347540A (en) * 1981-04-27 1982-08-31 Westinghouse Electric Corp. Solid-state load protection system having ground fault sensing
US4379317A (en) * 1981-04-27 1983-04-05 Westinghouse Electric Corp. Solid-state load protection system having loss of phase sensing
US4414601A (en) * 1981-04-27 1983-11-08 Westinghouse Electric Corp. Solid-state load protection system having a test feature
US4368500A (en) * 1981-04-27 1983-01-11 Westinghouse Electric Corp. Solid-state load protection system having an improved inverse time delay circuit
US4467391A (en) * 1981-12-28 1984-08-21 Refoy Brian G Monitor for an electrically-controlled system
US4833460A (en) * 1987-02-02 1989-05-23 Sabo Thomas E Phasing indicator
FR2613493B1 (fr) * 1987-03-30 1989-06-23 Alsthom Dispositifs de detection de transitions vers l'etat normal dans un bobinage supraconducteur, notamment de generatrice electrique, et de protection d'un tel bobinage
JP2501109B2 (ja) * 1987-07-17 1996-05-29 三菱電機株式会社 エレベ−タの安全装置
US5243489A (en) * 1990-01-29 1993-09-07 General Electric Company Protection circuit for multiple phase power system
US5168236A (en) * 1991-05-20 1992-12-01 Cox & Company, Inc. Fault detection circuit for use in determining the existence of a fault in any one of a plurality of multi-phase loads
US5369541A (en) * 1992-08-13 1994-11-29 Diversified Electronics, Inc. Three-phase unbalance and voltage monitor circuit
DE19919331A1 (de) 1999-04-28 2000-11-02 Ellenberger & Poensgen Unterspannungsauslöser
CN201811997U (zh) 2007-11-13 2011-04-27 艾默生环境优化技术有限公司 三相检测设备
US9063202B2 (en) * 2008-09-15 2015-06-23 Caterpillar Inc. Method and apparatus for detecting phase current imbalance in a power generator
US9488698B2 (en) 2014-11-20 2016-11-08 Caterpillar Global Mining Equipment Llc System and method for detecting diode failures
CN111098808B (zh) * 2019-12-12 2022-06-07 北京经纬恒润科技股份有限公司 基于直流电机纹波控制车身闭合部件的方法及其系统
CN114034902A (zh) * 2021-09-28 2022-02-11 海信（山东）空调有限公司 相电压检测方法、装置、变频空调器及其控制方法及装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123813A (en) * 1964-03-03 Baude
FR972827A (fr) * 1943-06-30 1951-02-05 Cem Comp Electro Mec Perfectionnements aux dispositifs de protection sélective
US3300650A (en) * 1963-04-12 1967-01-24 Automatic Switch Co Power line failure detection system
DE1294528B (de) * 1964-08-28 1969-05-08 Jansky Karl Einrichtung zum Schutz von Drehstromverbrauchern
US3242383A (en) * 1965-07-14 1966-03-22 Henry L Opad Monitoring circuit for detecting phase failure in a multi-phase electric power supply circuit
AT274110B (de) * 1967-12-22 1969-09-10 Elin Union Ag Induktive Einschaltströme von sonstigen Überströmen unterscheidende Schutzeinrichtung
US3575637A (en) * 1969-06-09 1971-04-20 Allen Bradley Co Gate-controlled phase failure protection circuit
US3636541A (en) * 1970-04-09 1972-01-18 Honeywell Inf Systems Loss of phase detector for a polyphase power system
US3846692A (en) * 1972-11-20 1974-11-05 Gen Electric Co Ltd Peak amplitude follower circuit

Also Published As

Publication number Publication date
CA1077614A (en) 1980-05-13
DE2624785C2 (xx) 1988-07-28
ES448412A1 (es) 1977-07-01
JPS51147738A (en) 1976-12-18
IT1080549B (it) 1985-05-16
SE419389B (sv) 1981-07-27
DE2624785A1 (de) 1976-12-16
BE842349A (fr) 1976-11-29
CH600643A5 (xx) 1978-06-30
AU500676B2 (en) 1979-05-31
SE7606099L (sv) 1976-12-03
BR7603424A (pt) 1977-02-15
AU1408576A (en) 1977-11-24
FR2313791A1 (fr) 1976-12-31
US4021703A (en) 1977-05-03
JPS5931284B2 (ja) 1984-08-01
GB1552781A (en) 1979-09-19
FR2313791B1 (xx) 1983-02-04

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