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
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/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
    • 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 (en) 1977-11-28 1977-11-28 Fault current protection switch

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 (en)
JP (1) JPS5482677A (en)
DE (1) DE2860672D1 (en)
DK (1) DK521978A (en)
ES (1) ES475484A1 (en)
IT (1) IT1100368B (en)
LU (1) LU78600A1 (en)
ZA (1) ZA786695B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383906B (en) * 1985-04-16 1987-09-10 Cti Ges Zur Pruefung Elektrote Fault current protection switch for fault change and fault current
ES2098821T3 (en) * 1993-06-25 1997-05-01 Siemens Ag INSTALLATION OF FAULT CURRENT DETECTION WITH HIGH SENSITIVITY.
DE4429007A1 (en) * 1994-08-16 1996-02-22 Siemens Ag Residual current circuit breaker with energy storage circuit
ITBG20030033A1 (en) * 2003-05-20 2004-11-21 Abb Service Srl ELECTRIC PROTECTION DEVICE AGAINST DIFFERENTIAL CURRENTS.
JP6429153B2 (en) * 2015-04-22 2018-11-28 パナソニックＩｐマネジメント株式会社 Shut-off device

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 (en) * 1968-12-03 1971-03-31 Weber Ag Fabrik Elektrotechn A Device for monitoring current differences in an electrical system
DE2062694B2 (en) * 1970-09-08 1975-05-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Residual current circuit breaker
US3710135A (en) * 1971-01-15 1973-01-09 Technical Management Services Alternating and direct current transformer using harmonic modulator
FR2321208A1 (en) * 1975-08-11 1977-03-11 Saparel Detection of leakage current to earth - uses differential current transformer whose core is saturated by leakage current

Also Published As

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

Similar Documents

Publication Publication Date Title
JPS5344884A (en) Circuit breaker
JPS5385377A (en) Circuit breaker
GB2008872B (en) Ground fault circuit interrupter
GB2026244B (en) Circuit breaker tripping
JPS5450885A (en) Multipole circuit breaker
AU508152B2 (en) Circuit breaker
JPS52109170A (en) Circuit breaker
ZA786695B (en) Earth-leakage circuit breaker responding to a.c.fault currents,d.c.components and smooth d.c.fault currents
GB2012127B (en) Fault-current circuit breaker
GB1546745A (en) Circuit breakers
JPS52136368A (en) Circuit breaker
DE2862181D1 (en) Gas-blast circuit breaker
JPS5454280A (en) Multipole circuit breaker
ATA224778A (en) FAULT CURRENT CIRCUIT BREAKER
JPS531874A (en) Circuit breaker
JPS531868A (en) Circuit breaker
AU2306177A (en) Circuit breaker
JPS5335140A (en) Circuit breaker tripping unit
YU57778A (en) Medium-voltage circuit interrupter
JPS5362183A (en) Doubleepole circuit breaker
JPS52129978A (en) Circuit breaker
JPS5357473A (en) Current limiting type circuit breaker
CH612036A5 (en) Gas-blast circuit breaker
JPS5324543A (en) Enclosed type switchboard
JPS534867A (en) Circuit breaker