GB1455845A - Ground fault protection system - Google Patents

Ground fault protection system

Info

Publication number
GB1455845A
GB1455845A GB963573A GB963573A GB1455845A GB 1455845 A GB1455845 A GB 1455845A GB 963573 A GB963573 A GB 963573A GB 963573 A GB963573 A GB 963573A GB 1455845 A GB1455845 A GB 1455845A
Authority
GB
United Kingdom
Prior art keywords
neutral
level detector
line
conductor
ground fault
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
GB963573A
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.)
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
Priority to GB963573A priority Critical patent/GB1455845A/en
Priority to CA192,694A priority patent/CA1005119A/en
Priority to ZA00741087A priority patent/ZA741087B/xx
Priority to FR7406491A priority patent/FR2219555B1/fr
Priority to IT67542/74A priority patent/IT1009180B/it
Publication of GB1455845A publication Critical patent/GB1455845A/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)
GB963573A 1973-02-27 1973-02-27 Ground fault protection system Expired GB1455845A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB963573A GB1455845A (en) 1973-02-27 1973-02-27 Ground fault protection system
CA192,694A CA1005119A (en) 1973-02-27 1974-02-15 Ground fault protective system including an impedance responsive oscillator
ZA00741087A ZA741087B (en) 1973-02-27 1974-02-19 Ground fault protective system
FR7406491A FR2219555B1 (enrdf_load_stackoverflow) 1973-02-27 1974-02-26
IT67542/74A IT1009180B (it) 1973-02-27 1974-03-06 Sistema di protezione contro guasto a terra

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
GB1455845A true GB1455845A (en) 1976-11-17

Family

ID=9875805

Family Applications (1)

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

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
FR2219555A1 (enrdf_load_stackoverflow) 1974-09-20
CA1005119A (en) 1977-02-08
ZA741087B (en) 1975-01-29
IT1009180B (it) 1976-12-10
FR2219555B1 (enrdf_load_stackoverflow) 1982-03-19

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Legal Events

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