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 secondaryInfo
- 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
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.
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)
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 |
-
1977
- 1977-04-01 FR FR7709918A patent/FR2386175A1/en active Granted
Cited By (9)
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 |