GB1394455A - Ground fault detectors - Google Patents

Ground fault detectors

Info

Publication number
GB1394455A
GB1394455A GB3466572A GB3466572A GB1394455A GB 1394455 A GB1394455 A GB 1394455A GB 3466572 A GB3466572 A GB 3466572A GB 3466572 A GB3466572 A GB 3466572A GB 1394455 A GB1394455 A GB 1394455A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuit
voltage
earth fault
fault current
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
GB3466572A
Other languages
English (en)
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.)
Westinghouse Electric 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 GB1394455A publication Critical patent/GB1394455A/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
    • H02H3/26—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
    • H02H3/347—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 using summation current transformers
    • 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
    • H02H3/027—Details with automatic disconnection after a predetermined time

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
GB3466572A 1971-08-30 1972-07-25 Ground fault detectors Expired GB1394455A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17588071A 1971-08-30 1971-08-30
US17611471A 1971-08-30 1971-08-30

Publications (1)

Publication Number Publication Date
GB1394455A true GB1394455A (en) 1975-05-14

Family

ID=26871657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3466572A Expired GB1394455A (en) 1971-08-30 1972-07-25 Ground fault detectors

Country Status (4)

Country Link
JP (1) JPS4839943A (enrdf_load_stackoverflow)
AU (1) AU467752B2 (enrdf_load_stackoverflow)
DE (1) DE2242216A1 (enrdf_load_stackoverflow)
GB (1) GB1394455A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385155B (de) * 1984-08-10 1988-02-25 Schrack Elektronik Ag Schaltungsanordnung zur steuerung einer netz-schalteinrichtung
CN112034283A (zh) * 2020-08-19 2020-12-04 重庆尚翔电气技术有限公司 检测和定位铝电解槽接地故障的装置及其系统和工艺

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023630U (enrdf_load_stackoverflow) * 1973-06-27 1975-03-17
JPS54152938U (enrdf_load_stackoverflow) * 1978-04-15 1979-10-24
US4163848A (en) * 1978-08-08 1979-08-07 Ciba-Geigy Corporation Process for the production of 2-alkyl- or cycloalkyl-4-methyl-6-hydroxypyrimidines
US4935516A (en) * 1988-01-29 1990-06-19 Ube Industries, Ltd. Process for preparing 4-hydroxypyrimidine
CN106597190B (zh) * 2016-11-21 2023-07-18 中车大连电力牵引研发中心有限公司 接地检测电路及方法
AU2020440805B2 (en) * 2020-04-03 2023-11-02 Hitachi Energy Ltd Electric switching device
CN113889971B (zh) * 2021-09-22 2024-10-15 贵州天义电器有限责任公司 一种三相负载不平衡电流保护gfi继电器电路

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385155B (de) * 1984-08-10 1988-02-25 Schrack Elektronik Ag Schaltungsanordnung zur steuerung einer netz-schalteinrichtung
CN112034283A (zh) * 2020-08-19 2020-12-04 重庆尚翔电气技术有限公司 检测和定位铝电解槽接地故障的装置及其系统和工艺
CN112034283B (zh) * 2020-08-19 2023-04-07 重庆尚翔电气技术有限公司 检测和定位铝电解槽接地故障的装置及其系统和工艺

Also Published As

Publication number Publication date
JPS4839943A (enrdf_load_stackoverflow) 1973-06-12
DE2242216A1 (de) 1973-03-08
AU4476672A (en) 1974-02-07
AU467752B2 (en) 1975-12-11

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Legal Events

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