AU510539B2 - Earth leakage detection - Google Patents

Earth leakage detection

Info

Publication number
AU510539B2
AU510539B2 AU26730/77A AU2673077A AU510539B2 AU 510539 B2 AU510539 B2 AU 510539B2 AU 26730/77 A AU26730/77 A AU 26730/77A AU 2673077 A AU2673077 A AU 2673077A AU 510539 B2 AU510539 B2 AU 510539B2
Authority
AU
Australia
Prior art keywords
leakage detection
earth leakage
earth
detection
leakage
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
AU26730/77A
Other versions
AU2673077A (en
Inventor
M Groenenboom
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.)
Hazemeijer BV
Original Assignee
Hazemeijer BV
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
Priority claimed from NL7606316A external-priority patent/NL7606316A/en
Priority claimed from NL7607752A external-priority patent/NL185241C/en
Priority claimed from NL7706317A external-priority patent/NL190969C/en
Application filed by Hazemeijer BV filed Critical Hazemeijer BV
Publication of AU2673077A publication Critical patent/AU2673077A/en
Application granted granted Critical
Publication of AU510539B2 publication Critical patent/AU510539B2/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
    • H02H3/332—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
    • G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
AU26730/77A 1976-06-11 1977-07-04 Earth leakage detection Expired AU510539B2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NL7606316A NL7606316A (en) 1975-07-14 1976-06-11 HAIRSTYLE.
NLNL7607752 1976-07-13
NL7607752A NL185241C (en) 1976-07-13 1976-07-13 FLOW MEASUREMENT SYSTEM.
NLNL7606316 1977-06-08
NL7706317A NL190969C (en) 1976-07-13 1977-06-08 Current measurement system.
NLNL7706317 1977-06-08

Publications (2)

Publication Number Publication Date
AU2673077A AU2673077A (en) 1979-01-11
AU510539B2 true AU510539B2 (en) 1980-07-03

Family

ID=27352011

Family Applications (1)

Application Number Title Priority Date Filing Date
AU26730/77A Expired AU510539B2 (en) 1976-06-11 1977-07-04 Earth leakage detection

Country Status (1)

Country Link
AU (1) AU510539B2 (en)

Also Published As

Publication number Publication date
AU2673077A (en) 1979-01-11

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