ZA741087B - Ground fault protective system - Google Patents

Ground fault protective system

Info

Publication number
ZA741087B
ZA741087B ZA00741087A ZA741087A ZA741087B ZA 741087 B ZA741087 B ZA 741087B ZA 00741087 A ZA00741087 A ZA 00741087A ZA 741087 A ZA741087 A ZA 741087A ZA 741087 B ZA741087 B ZA 741087B
Authority
ZA
South Africa
Prior art keywords
ground fault
protective system
fault protective
ground
protective
Prior art date
Application number
ZA00741087A
Inventor
G Clarke
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
Publication of ZA741087B publication Critical patent/ZA741087B/en

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)
ZA00741087A 1973-02-27 1974-02-19 Ground fault protective system ZA741087B (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
ZA741087B true ZA741087B (en) 1975-01-29

Family

ID=9875805

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00741087A ZA741087B (en) 1973-02-27 1974-02-19 Ground fault protective system

Country Status (5)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508979C2 (en) * 1975-03-01 1984-07-12 Günter 4800 Bielefeld Reichensperger Arrangement for a circuit breaker with a fault current monitoring unit and an earthing resistance monitoring unit
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
CA1005119A (en) 1977-02-08
IT1009180B (en) 1976-12-10
FR2219555B1 (en) 1982-03-19
FR2219555A1 (en) 1974-09-20

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