CA1005119A - Ground fault protective system including an impedance responsive oscillator - Google Patents

Ground fault protective system including an impedance responsive oscillator

Info

Publication number
CA1005119A
CA1005119A CA192,694A CA192694A CA1005119A CA 1005119 A CA1005119 A CA 1005119A CA 192694 A CA192694 A CA 192694A CA 1005119 A CA1005119 A CA 1005119A
Authority
CA
Canada
Prior art keywords
system including
ground fault
protective system
fault protective
impedance responsive
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
CA192,694A
Other languages
English (en)
Inventor
Geoffrey Clarke
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
Application filed by Square D Co filed Critical Square D Co
Application granted granted Critical
Publication of CA1005119A publication Critical patent/CA1005119A/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
    • H02H3/33—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 using summation current transformers
    • H02H3/331—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 using summation current transformers responsive to earthing of the neutral conductor
    • 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
    • H02H3/16—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 fault current to earth, frame or mass
    • H02H3/17—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 fault current to earth, frame or mass by means of an auxiliary voltage injected into the installation to be protected

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
CA192,694A 1973-02-27 1974-02-15 Ground fault protective system including an impedance responsive oscillator Expired CA1005119A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB963573A GB1455845A (en) 1973-02-27 1973-02-27 Ground fault protection system

Publications (1)

Publication Number Publication Date
CA1005119A true CA1005119A (en) 1977-02-08

Family

ID=9875805

Family Applications (1)

Application Number Title Priority Date Filing Date
CA192,694A Expired CA1005119A (en) 1973-02-27 1974-02-15 Ground fault protective system including an impedance responsive oscillator

Country Status (5)

Country Link
CA (1) CA1005119A (enrdf_load_stackoverflow)
FR (1) FR2219555B1 (enrdf_load_stackoverflow)
GB (1) GB1455845A (enrdf_load_stackoverflow)
IT (1) IT1009180B (enrdf_load_stackoverflow)
ZA (1) ZA741087B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508979C2 (de) * 1975-03-01 1984-07-12 Günter 4800 Bielefeld Reichensperger Anordnung für einen Schutzschalter mit einer Fehlerstrom-Überwachungseinheit und einer Erdungswiderstand-Überwachungseinheit
US3963963A (en) * 1975-04-22 1976-06-15 Rca Corporation Ground-fault detection system

Also Published As

Publication number Publication date
GB1455845A (en) 1976-11-17
FR2219555A1 (enrdf_load_stackoverflow) 1974-09-20
ZA741087B (en) 1975-01-29
FR2219555B1 (enrdf_load_stackoverflow) 1982-03-19
IT1009180B (it) 1976-12-10

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