DK521978A - RATIO POWER PROTECTION SWITCH RESPONDING TO AC POWER FLOW COMPONENTS AND TO SMOOTH POWER CURRENT ERRORS - Google Patents

RATIO POWER PROTECTION SWITCH RESPONDING TO AC POWER FLOW COMPONENTS AND TO SMOOTH POWER CURRENT ERRORS

Info

Publication number
DK521978A
DK521978A DK521978A DK521978A DK521978A DK 521978 A DK521978 A DK 521978A DK 521978 A DK521978 A DK 521978A DK 521978 A DK521978 A DK 521978A DK 521978 A DK521978 A DK 521978A
Authority
DK
Denmark
Prior art keywords
power
protection switch
flow components
smooth
ratio
Prior art date
Application number
DK521978A
Other languages
Danish (da)
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 DK521978A publication Critical patent/DK521978A/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)
DK521978A 1977-11-28 1978-11-23 RATIO POWER PROTECTION SWITCH RESPONDING TO AC POWER FLOW COMPONENTS AND TO SMOOTH POWER CURRENT ERRORS DK521978A (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
DK521978A true DK521978A (en) 1979-05-29

Family

ID=19728781

Family Applications (1)

Application Number Title Priority Date Filing Date
DK521978A DK521978A (en) 1977-11-28 1978-11-23 RATIO POWER PROTECTION SWITCH RESPONDING TO AC POWER FLOW COMPONENTS AND TO SMOOTH POWER CURRENT ERRORS

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
EP0635922B1 (en) * 1993-06-25 1997-03-05 Siemens Aktiengesellschaft Fault current acquiring device having 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
DE2860672D1 (en) 1981-08-06
EP0002225B1 (en) 1981-04-29
EP0002225A1 (en) 1979-06-13
IT7830140A0 (en) 1978-11-24
JPS5482677A (en) 1979-07-02
IT1100368B (en) 1985-09-28
ZA786695B (en) 1979-10-31
LU78600A1 (en) 1979-06-13
ES475484A1 (en) 1979-04-01

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