ZA786695B - Earth-leakage circuit breaker responding to a.c.fault currents,d.c.components and smooth d.c.fault currents - Google Patents

Earth-leakage circuit breaker responding to a.c.fault currents,d.c.components and smooth d.c.fault currents

Info

Publication number
ZA786695B
ZA786695B ZA00786695A ZA786695A ZA786695B ZA 786695 B ZA786695 B ZA 786695B ZA 00786695 A ZA00786695 A ZA 00786695A ZA 786695 A ZA786695 A ZA 786695A ZA 786695 B ZA786695 B ZA 786695B
Authority
ZA
South Africa
Prior art keywords
fault currents
earth
smooth
components
circuit breaker
Prior art date
Application number
ZA00786695A
Other languages
English (en)
Inventor
N Gath
Original Assignee
N Gath
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 N Gath filed Critical N Gath
Publication of ZA786695B publication Critical patent/ZA786695B/xx

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/40—Instruments transformers for DC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
ZA00786695A 1977-11-28 1978-11-28 Earth-leakage circuit breaker responding to a.c.fault currents,d.c.components and smooth d.c.fault currents ZA786695B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU78600A LU78600A1 (de) 1977-11-28 1977-11-28 Fehlerstromschutzschalter

Publications (1)

Publication Number Publication Date
ZA786695B true ZA786695B (en) 1979-10-31

Family

ID=19728781

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00786695A ZA786695B (en) 1977-11-28 1978-11-28 Earth-leakage circuit breaker responding to a.c.fault currents,d.c.components and smooth d.c.fault currents

Country Status (8)

Country Link
EP (1) EP0002225B1 (da)
JP (1) JPS5482677A (da)
DE (1) DE2860672D1 (da)
DK (1) DK521978A (da)
ES (1) ES475484A1 (da)
IT (1) IT1100368B (da)
LU (1) LU78600A1 (da)
ZA (1) ZA786695B (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383906B (de) * 1985-04-16 1987-09-10 Cti Ges Zur Pruefung Elektrote Fehlerstromschutzschalter fuer fehlerwechselund fehlergleichstroeme
EP0635922B1 (de) * 1993-06-25 1997-03-05 Siemens Aktiengesellschaft Fehlerstromerfassungseinrichtung mit hoher Empfindlichkeit
DE4429007A1 (de) * 1994-08-16 1996-02-22 Siemens Ag Fehlerstromschutzschalter mit Energiespeicherschaltung
ITBG20030033A1 (it) * 2003-05-20 2004-11-21 Abb Service Srl Dispositivo elettrico di protezione contro correnti differenziali.
JP6429153B2 (ja) * 2015-04-22 2018-11-28 パナソニックＩｐマネジメント株式会社 遮断装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579260A (en) * 1965-07-28 1971-05-18 Lewis J Logan Machine for welding studs to beams
CH505391A (de) * 1968-12-03 1971-03-31 Weber Ag Fabrik Elektrotechn A Einrichtung zur Überwachung von Stromdifferenzen in einer elektrischen Anlage
DE2062694B2 (de) * 1970-09-08 1975-05-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Fehlerstromschutzschalter
US3710135A (en) * 1971-01-15 1973-01-09 Technical Management Services Alternating and direct current transformer using harmonic modulator
FR2321208A1 (fr) * 1975-08-11 1977-03-11 Saparel Systemes differentiels de protection

Also Published As

Publication number Publication date
ES475484A1 (es) 1979-04-01
IT7830140A0 (it) 1978-11-24
DE2860672D1 (en) 1981-08-06
EP0002225A1 (de) 1979-06-13
DK521978A (da) 1979-05-29
LU78600A1 (de) 1979-06-13
IT1100368B (it) 1985-09-28
JPS5482677A (en) 1979-07-02
EP0002225B1 (de) 1981-04-29

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