GB2012127A - Fault-current circuit breaker - Google Patents

Fault-current circuit breaker

Info

Publication number
GB2012127A
GB2012127A GB7842549A GB7842549A GB2012127A GB 2012127 A GB2012127 A GB 2012127A GB 7842549 A GB7842549 A GB 7842549A GB 7842549 A GB7842549 A GB 7842549A GB 2012127 A GB2012127 A GB 2012127A
Authority
GB
United Kingdom
Prior art keywords
core
fault
alternating current
secondary winding
threshold
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.)
Granted
Application number
GB7842549A
Other versions
GB2012127B (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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Germany
Publication of GB2012127A publication Critical patent/GB2012127A/en
Application granted granted Critical
Publication of GB2012127B publication Critical patent/GB2012127B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • 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
    • 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
    • H02H3/334—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 to produce an artificial unbalance for other protection or monitoring reasons or remote control
    • H02H3/335—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 to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device
    • 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
    • H02H3/338—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 also responsive to wiring error, e.g. loss of neutral, break

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

An earth-leakage protection system comprises a core-balance transformer with an iron core 5 of low coercive force, and a supply device 1 which applies an alternating current to the secondary winding 8 to premagnetise the core 5. The supply device 1 also supplies an initial charge to an energy store 12 in the form of a capacitor connected to the secondary winding 8. When a fault occurs the voltage across the capacitor 12 rises further, exceeding the threshold of a threshold device 13 and discharging through a tripping device 14 to interrupt the mains supply. The system may be tested by closing a switch 21 to artificially increase the premagnetising alternating current. <IMAGE>
GB7842549A 1977-10-31 1978-10-31 Fault-current circuit breaker Expired GB2012127B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2917377A IT1088165B (en) 1977-10-31 1977-10-31 SAFETY DEVICE FOR ELECTRICAL SYSTEMS, OF THE DIFFERENTIAL TRANSFORMER TYPE WITH RELEASE

Publications (2)

Publication Number Publication Date
GB2012127A true GB2012127A (en) 1979-07-18
GB2012127B GB2012127B (en) 1982-03-24

Family

ID=11226484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7842549A Expired GB2012127B (en) 1977-10-31 1978-10-31 Fault-current circuit breaker

Country Status (3)

Country Link
DE (1) DE2845993A1 (en)
GB (1) GB2012127B (en)
IT (1) IT1088165B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938971A1 (en) * 1979-09-26 1981-04-09 Siemens AG, 1000 Berlin und 8000 München Fault current protection switch with pre-magnetized core
DE3007227A1 (en) * 1980-02-27 1981-10-22 Schupa Elektro-GmbH + Co KG, 5885 Schalksmühle HIGH-SENSITIVE, ALL-CURRENT-SENSITIVE FAULT CURRENT SWITCH
DE3106960A1 (en) * 1981-02-25 1982-09-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Residual current device
DE3230557A1 (en) 1982-08-17 1984-02-23 Siemens AG, 1000 Berlin und 8000 München Fault current protection switch
DE3429381A1 (en) * 1984-08-09 1986-02-20 Siemens AG, 1000 Berlin und 8000 München Differential-current protection circuit breaker
IT1185437B (en) * 1985-10-15 1987-11-12 Elettrocondutture STATIC AMPLIFIER WITH WEAK SIGNALS WITHOUT AUXILIARY POWER SUPPLY
GB9908930D0 (en) * 1999-04-19 1999-06-16 Pbt Limited Active material low power electrical switching mechanism
EP1150412A1 (en) 2000-04-25 2001-10-31 Siemens Aktiengesellschaft Earth fault circuit breaker and method for testing the proper operation of an earth fault circuit breaker

Also Published As

Publication number Publication date
IT1088165B (en) 1985-06-10
GB2012127B (en) 1982-03-24
DE2845993A1 (en) 1979-05-10

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Legal Events

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