FR2386175A1 - Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary - Google Patents

Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary

Info

Publication number
FR2386175A1
FR2386175A1 FR7709918A FR7709918A FR2386175A1 FR 2386175 A1 FR2386175 A1 FR 2386175A1 FR 7709918 A FR7709918 A FR 7709918A FR 7709918 A FR7709918 A FR 7709918A FR 2386175 A1 FR2386175 A1 FR 2386175A1
Authority
FR
France
Prior art keywords
electrical device
isolating transformer
transformer secondary
overvoltage protection
variable resistors
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
FR7709918A
Other languages
French (fr)
Other versions
FR2386175B1 (en
Inventor
Gerard Ebersohl
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.)
Cegelec SA
Delle Alsthom SA
Original Assignee
Cegelec SA
Delle Alsthom 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 Cegelec SA, Delle Alsthom SA filed Critical Cegelec SA
Priority to FR7709918A priority Critical patent/FR2386175A1/en
Publication of FR2386175A1 publication Critical patent/FR2386175A1/en
Application granted granted Critical
Publication of FR2386175B1 publication Critical patent/FR2386175B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
    • H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

The over-voltage protection for an electrical device (34) with an input isolating transformer (40) uses symmetrical variable resistances (43, 44) in parallel with the transformer secondary winding (42) and between one of the secondary conductors and an earth contact. The electrical device (34) is isolated from the local earth (50) and is coupled to the earth contact (33) via a direct line (52). The isolating transformer (40) has a primary winding (41) divided into several separate parts by open screens at the potential of the points separating the two parts.
FR7709918A 1977-04-01 1977-04-01 Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary Granted FR2386175A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7709918A FR2386175A1 (en) 1977-04-01 1977-04-01 Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7709918A FR2386175A1 (en) 1977-04-01 1977-04-01 Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary

Publications (2)

Publication Number Publication Date
FR2386175A1 true FR2386175A1 (en) 1978-10-27
FR2386175B1 FR2386175B1 (en) 1981-01-30

Family

ID=9188917

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7709918A Granted FR2386175A1 (en) 1977-04-01 1977-04-01 Line overvoltage protection for electrical device - has symmetrical variable resistors coupled to isolating transformer secondary

Country Status (1)

Country Link
FR (1) FR2386175A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050966A1 (en) * 1980-10-24 1982-05-05 ONEAC Corporation Protection circuit for a power distribution system
EP0072146A1 (en) * 1981-08-04 1983-02-16 Yelland Engineering (Proprietary) Limited Electric switching surge protection
FR2514547A1 (en) * 1981-10-12 1983-04-15 Soule Sa Lightning protector for overhead distribution line transformer - includes voltage balancing spark gaps linking medium and low voltage circuits
EP0078985A1 (en) * 1981-11-09 1983-05-18 General Electric Company Internal voltage grading and transient voltage protection for power transformer windings
FR2523779A1 (en) * 1982-03-22 1983-09-23 Berdanos Guy ISOLATED BINARY TRANSMISSION DEVICE BY ELECTRIC LINE
EP0163907A1 (en) * 1984-05-04 1985-12-11 Siemens Aktiengesellschaft High-tension transformer winding with regulated voltage distribution

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050966A1 (en) * 1980-10-24 1982-05-05 ONEAC Corporation Protection circuit for a power distribution system
EP0072146A1 (en) * 1981-08-04 1983-02-16 Yelland Engineering (Proprietary) Limited Electric switching surge protection
US4494163A (en) * 1981-08-04 1985-01-15 Yelland Engineering (Proprietary) Ltd. Electric switching surge protection
FR2514547A1 (en) * 1981-10-12 1983-04-15 Soule Sa Lightning protector for overhead distribution line transformer - includes voltage balancing spark gaps linking medium and low voltage circuits
EP0078985A1 (en) * 1981-11-09 1983-05-18 General Electric Company Internal voltage grading and transient voltage protection for power transformer windings
FR2523779A1 (en) * 1982-03-22 1983-09-23 Berdanos Guy ISOLATED BINARY TRANSMISSION DEVICE BY ELECTRIC LINE
WO1983003500A1 (en) * 1982-03-22 1983-10-13 Guy Berdanos Insulated device for the transmission of binary information through an electric line
US4719530A (en) * 1982-03-22 1988-01-12 Guy Berdanos Lightning protection system for a remote control circuit utilizing an isolation transformer
EP0163907A1 (en) * 1984-05-04 1985-12-11 Siemens Aktiengesellschaft High-tension transformer winding with regulated voltage distribution

Also Published As

Publication number Publication date
FR2386175B1 (en) 1981-01-30

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Legal Events

Date Code Title Description
ST Notification of lapse