GB923292A - Apparatus for detecting earth faults in electric current supply systems - Google Patents

Apparatus for detecting earth faults in electric current supply systems

Info

Publication number
GB923292A
GB923292A GB39113/60A GB3911360A GB923292A GB 923292 A GB923292 A GB 923292A GB 39113/60 A GB39113/60 A GB 39113/60A GB 3911360 A GB3911360 A GB 3911360A GB 923292 A GB923292 A GB 923292A
Authority
GB
United Kingdom
Prior art keywords
voltage
relay
ust
phase relationship
responds
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
GB39113/60A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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 Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB923292A publication Critical patent/GB923292A/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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

923,292. Protective cut-out systems. SIE. MENS-SCHUCKERTWERKE A.G. Nov. 14, 1960 [Nov. 13, 1959], No. 39113/60. Class 38 (5). An earth leakage protection system includes a core-balance transformer W having a secondary winding, the output of which is fed to means which responds to its phase relationship to a control value dependent upon the voltage relationship of a part of the protected system to a conductor extending alongside the main system conductors. As shown in Fig. 1, the relay R responds to the phase relationship between voltages Ust, U 1 , U 2 , the former being proportional to the voltage between an artificial star point and a " protective conductor " SL. In Fig. 3, the voltage Ust is arranged to oscillate a " mechanical contact rectifier" 1 so that the output U of the core-balance transformer is fed to a polarized relay 2 to effect operation in a direction dependent on the phase relationship and so indicate the direction of the fault relative to the transformer. A transistor bridge circuit may be triggered by the voltage Ust (Fig. 4, not shown), or the respective voltages may be converted to squarewave pulses and/or amplified to operate a relay which may cause the main system to be deenergized (e.g. by a short-circuiting switch, Figs. 5 and 6, not shown).
GB39113/60A 1959-11-13 1960-11-14 Apparatus for detecting earth faults in electric current supply systems Expired GB923292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES65832A DE1100152B (en) 1959-11-13 1959-11-13 Arrangement for the selective measurement and disconnection of earth faults in electrical systems, especially in underground mine networks

Publications (1)

Publication Number Publication Date
GB923292A true GB923292A (en) 1963-04-10

Family

ID=7498341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39113/60A Expired GB923292A (en) 1959-11-13 1960-11-14 Apparatus for detecting earth faults in electric current supply systems

Country Status (3)

Country Link
BE (1) BE596965A (en)
DE (1) DE1100152B (en)
GB (1) GB923292A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343080A (en) * 1963-10-07 1967-09-19 Gen Electric Pulsing ground fault detector apparatus
US3356939A (en) * 1964-03-25 1967-12-05 Fed Pacific Electric Co Ground leakage detection apparatus for ungrounded systems including toroidal core detector means
US3735250A (en) * 1970-07-08 1973-05-22 Shibaura Electric Comp Fault detecting apparatus for a capacitor type potential divider having an amplifier
US4054832A (en) * 1975-10-21 1977-10-18 James G. Biddle Company System and method of measurement of insulation qualities of three-phase power equipment
EP2530841B1 (en) * 2011-06-01 2019-05-29 Siemens Healthcare GmbH Device and method for protecting a mains filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077531B (en) * 1980-06-04 1983-06-08 Evans Jacob Donald Fault detection in n-phase system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343080A (en) * 1963-10-07 1967-09-19 Gen Electric Pulsing ground fault detector apparatus
US3356939A (en) * 1964-03-25 1967-12-05 Fed Pacific Electric Co Ground leakage detection apparatus for ungrounded systems including toroidal core detector means
US3735250A (en) * 1970-07-08 1973-05-22 Shibaura Electric Comp Fault detecting apparatus for a capacitor type potential divider having an amplifier
US4054832A (en) * 1975-10-21 1977-10-18 James G. Biddle Company System and method of measurement of insulation qualities of three-phase power equipment
EP2530841B1 (en) * 2011-06-01 2019-05-29 Siemens Healthcare GmbH Device and method for protecting a mains filter

Also Published As

Publication number Publication date
BE596965A (en) 1961-03-01
DE1100152B (en) 1961-02-23

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