FR2400247A1 - Dispositif a tore sensible a un courant electrique - Google Patents

Dispositif a tore sensible a un courant electrique

Info

Publication number
FR2400247A1
FR2400247A1 FR7724583A FR7724583A FR2400247A1 FR 2400247 A1 FR2400247 A1 FR 2400247A1 FR 7724583 A FR7724583 A FR 7724583A FR 7724583 A FR7724583 A FR 7724583A FR 2400247 A1 FR2400247 A1 FR 2400247A1
Authority
FR
France
Prior art keywords
potentiometer
transformer
core
toroidal core
sensitivity range
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.)
Granted
Application number
FR7724583A
Other languages
English (en)
Other versions
FR2400247B1 (fr
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.)
Societe dAppareillage Electrique SAPAREL SA
Original Assignee
Societe dAppareillage Electrique SAPAREL SA
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 Societe dAppareillage Electrique SAPAREL SA filed Critical Societe dAppareillage Electrique SAPAREL SA
Priority to FR7724583A priority Critical patent/FR2400247A1/fr
Publication of FR2400247A1 publication Critical patent/FR2400247A1/fr
Application granted granted Critical
Publication of FR2400247B1 publication Critical patent/FR2400247B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
    • H01F27/427—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for current transformers
    • 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
    • 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
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H01F2038/305—Constructions with toroidal magnetic core
    • 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)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un dispositif à tore sensible à un courant électrique. Le trou central d'un tore est traversé par des conducteurs parcourus par le courant à mesurer ou à détecter, et ce tore porte un enroulement secondaire alimentant un organe de mesure ou de détection, et un enroulement d'atténuation qui peut être mis en court-circuit pour diminuer la sensibilité du dispositif sans changer la plage de valeurs du flux magnétique dans le tore Application aux mesures d'intensité et aux relais à détection différentielle pour la protection des installations électriques.
FR7724583A 1977-08-10 1977-08-10 Dispositif a tore sensible a un courant electrique Granted FR2400247A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724583A FR2400247A1 (fr) 1977-08-10 1977-08-10 Dispositif a tore sensible a un courant electrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724583A FR2400247A1 (fr) 1977-08-10 1977-08-10 Dispositif a tore sensible a un courant electrique

Publications (2)

Publication Number Publication Date
FR2400247A1 true FR2400247A1 (fr) 1979-03-09
FR2400247B1 FR2400247B1 (fr) 1980-04-25

Family

ID=9194427

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724583A Granted FR2400247A1 (fr) 1977-08-10 1977-08-10 Dispositif a tore sensible a un courant electrique

Country Status (1)

Country Link
FR (1) FR2400247A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550403A2 (fr) * 1987-08-07 1993-07-07 Mitsui Petrochemical Industries, Ltd. Appareil pour évaluer l'état d'isolation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550403A2 (fr) * 1987-08-07 1993-07-07 Mitsui Petrochemical Industries, Ltd. Appareil pour évaluer l'état d'isolation
EP0550403A3 (fr) * 1987-08-07 1993-07-14 Mitsui Petrochemical Industries, Ltd. Appareil pour évaluer l'état d'isolation

Also Published As

Publication number Publication date
FR2400247B1 (fr) 1980-04-25

Similar Documents

Publication Publication Date Title
GB1028588A (en) Electro-mechanical transducer
FR2400247A1 (fr) Dispositif a tore sensible a un courant electrique
JPS52151817A (en) Accdc signal transformer with ferromagnetic iron core
GB1152186A (en) Improvements in Electrical Transformers
GB1513038A (en) Electrical transformers of the kind employing a magnetic core
ES470922A1 (es) Dispositivo para detectar la posicion de las barras de regu-lacion para reactor nuclear
GB1010579A (en) Arc welding apparatus
GB918978A (en) Improvements in electrical transformers
FR2321208A1 (fr) Systemes differentiels de protection
ES8305965A1 (es) "una aparato electrico de induccion, particularmente combinacion de transformadores".
DE3067017D1 (en) Measuring arrangement for electric currents
JPS56112108A (en) Branch device
GB1527963A (en) Electrical protection apparatus
GB1095125A (en) Improvements in electrical bridge circuits
JPS5332324A (en) Mould winding
JPS5543484A (en) Position detecting device
GB740467A (en) Improvements in current transformers
ES474971A1 (es) Un circuito de entrada para un receptor de senales en insta-laciones telefonicas
GB1493540A (en) Arrangements for increasing the impedance of transformer windings
JPS6490513A (en) Transformer
JPS54113828A (en) Small current transformer
JPS5629311A (en) On-load voltage regulating transformer
ES361876A1 (es) Metodo para la medicion sin contactos, galvanicamente sepa-rada, del valor absoluto de impedancias.
JPS5261726A (en) Potential current transformer
JPS57198616A (en) Large-current slide type transformer

Legal Events

Date Code Title Description
ST Notification of lapse