ZA805948B - Circuit arrangement for an earth fault current circuit breaker - Google Patents

Circuit arrangement for an earth fault current circuit breaker

Info

Publication number
ZA805948B
ZA805948B ZA00805948A ZA805948A ZA805948B ZA 805948 B ZA805948 B ZA 805948B ZA 00805948 A ZA00805948 A ZA 00805948A ZA 805948 A ZA805948 A ZA 805948A ZA 805948 B ZA805948 B ZA 805948B
Authority
ZA
South Africa
Prior art keywords
circuit
fault current
current
earth fault
circuit breaker
Prior art date
Application number
ZA00805948A
Inventor
D Harr
R Westermayer
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ZA805948B publication Critical patent/ZA805948B/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
    • H02H3/332—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 with means responsive to dc component in the fault current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

1. Earth fault current circuit breaker, the core of the core balance transformer (4) of which is premagnetised by a quiescent current derived from the system to be monitored by way of a feed circuit (8), wherein a variation of the magnetic flux in the core due to a fault current so changes the electrical resistance of the tripping circuit (9) that there can flow therein a current causing the tripping relay (3) to operate, characterised in that provision is made in the feed circuit (8) or in the tripping circuit (9) for suppressing the first half-cycle of the premagnetising current after restoration of the mains supply.
ZA00805948A 1979-09-26 1980-09-25 Circuit arrangement for an earth fault current circuit breaker ZA805948B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792938971 DE2938971A1 (en) 1979-09-26 1979-09-26 Fault current protection switch with pre-magnetized core

Publications (1)

Publication Number Publication Date
ZA805948B true ZA805948B (en) 1981-09-30

Family

ID=6081906

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00805948A ZA805948B (en) 1979-09-26 1980-09-25 Circuit arrangement for an earth fault current circuit breaker

Country Status (8)

Country Link
EP (1) EP0026357B1 (en)
JP (1) JPS5698328A (en)
AT (1) ATE3486T1 (en)
DE (1) DE2938971A1 (en)
DK (1) DK402880A (en)
ES (1) ES495334A0 (en)
GR (1) GR70212B (en)
ZA (1) ZA805948B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106960A1 (en) * 1981-02-25 1982-09-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Residual current device
JP3021919U (en) * 1995-04-05 1996-03-12 功 塩谷 Double baggage equipment

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069782B (en) * 1959-11-26
CH252903A (en) * 1949-12-20 1948-01-31 Oerlikon Maschf Earth fault protection device.
US3376477A (en) * 1965-12-06 1968-04-02 Hubbell Inc Harvey Protective circuit
DE2043007A1 (en) * 1970-08-29 1972-03-02 Siemens Ag Residual current circuit breaker
IT1088165B (en) * 1977-10-31 1985-06-10 Elettrocondutture SAFETY DEVICE FOR ELECTRICAL SYSTEMS, OF THE DIFFERENTIAL TRANSFORMER TYPE WITH RELEASE

Also Published As

Publication number Publication date
GR70212B (en) 1982-08-31
EP0026357A1 (en) 1981-04-08
ES8200510A1 (en) 1981-11-01
ATE3486T1 (en) 1983-06-15
EP0026357B1 (en) 1983-05-18
DK402880A (en) 1981-03-27
DE2938971A1 (en) 1981-04-09
ES495334A0 (en) 1981-11-01
JPS5698328A (en) 1981-08-07
JPS6240924B2 (en) 1987-08-31

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