EP0803881B1 - Hochspannungsstrombegrenzer auf Polymerbasis - Google Patents

Hochspannungsstrombegrenzer auf Polymerbasis Download PDF

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Publication number
EP0803881B1
EP0803881B1 EP97400880A EP97400880A EP0803881B1 EP 0803881 B1 EP0803881 B1 EP 0803881B1 EP 97400880 A EP97400880 A EP 97400880A EP 97400880 A EP97400880 A EP 97400880A EP 0803881 B1 EP0803881 B1 EP 0803881B1
Authority
EP
European Patent Office
Prior art keywords
polymer
elements
matrix
conductors
limiter according
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.)
Expired - Lifetime
Application number
EP97400880A
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English (en)
French (fr)
Other versions
EP0803881A1 (de
Inventor
Van Doan Pham
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D SA
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Filing date
Publication date
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Publication of EP0803881A1 publication Critical patent/EP0803881A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/13—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current responsive

Definitions

  • the present invention relates to a current limiter high voltage polymer.
  • the polymer elements small and mostly thin, have legs welded on each of their faces and of which the end is welded to a collector.
  • This device which requires a large number of soldering or electrical connections, is not very economical and not robust enough.
  • each element has a capacity relatively high clean. This results in an ability important per floor, from which it results a possibility of unbalance the voltage distribution between the stages.
  • An object of the present invention is to design a polymer current limiter with a robust structure, requiring only a very small number of soldering or electrical connections, and having a global capacity low.
  • the subject of the invention is a current limiter with high-voltage polymer comprising, per phase, a pole fast circuit breaker, a protective circuit breaker pole semi-rapid and a set of polymer-based elements of very low resistivity loaded with carbon black mounted in series and parallel, characterized in that the elements have a carbon-loaded polymer matrix having an elongated shape and having inside two parallel metallic conductors.
  • the matrix has an oblong section.
  • the matrix is surrounded by a sheath in insulating material.
  • the material of the sheath is a fluoropolymer.
  • the two conductors of an element lead to the same end out of the matrix and a group of elements in series consists of an assembly of elements arranged side by side and in contact two by two by the short side of their lateral surface, and connected by connections arranged on the same side of the assembly.
  • the two conductors of an element lead out of the matrix respectively at opposite ends and that a group of elements in series consists of an assembly elements arranged side by side and in contact two by two by the large side of their lateral surface and connected by connections arranged alternately on both sides of the assembly.
  • the electrical resistivity of the carbon black charged polymer is about 1 ⁇ xcm.
  • the length of an element is around 1000 mm.
  • the distance between the conductors parallels of an element is of the order of 10 mm.
  • reference 1 designates an element to polymer used in the production of the the invention.
  • This element includes two conductors parallel, 2 and 3, preferably tinned copper, under braid or rod form. These conductors are coated in a matrix 4 of polymer (polyethylene) loaded with black of carbon; the matrix is protected by an insulating sheath 5, for example in fluoropolymer, ensuring good hold mechanical and dielectric; the matrix is closed to both ends by insulating plugs 6 and 7.
  • the conductors have, inside the matrix, a length L and are separated by a distance e. At one end of the element, conductors 2 and 3 pass through the plug end (plug 7 in Fig. 1).
  • the electrical resistivity of the black charged polymer of carbon is approximately 1 ⁇ xcm for a compound comprising 50% by weight of polymer and 50% by weight of carbon black.
  • the matrix has a preferably oblong section, this which reduces the size of the device.
  • Fig. 2 shows a limiter pole according to the invention, inserted on a phase 1 of the line to be protected.
  • the limiter pole includes a circuit breaker pole fast D arranged in series in line l and, in parallel on the terminals of this circuit breaker, an assembly comprising series a semi-fast circuit breaker d and a plurality of polymer elements of the type described above, connected in series, and referenced P1 to P4.
  • the elements are arranged side by side, and in contact two by two by the short side of their insulating surface.
  • the elements P1 to P4 are connected in series by metallic connections C1 to C3 which are located all on the same side. In the two conductors of the same element, the currents flow in opposite directions.
  • All elements P1 to P4 are assembled rigidly by insulating strips B1, B2.
  • the set is preferably placed in an insulating enclosure not shown, filled with a dielectric gas such as nitrogen at atmospheric pressure, and provided with bushings of current.
  • a limiter for a nominal voltage line at 24 kV will include 20 groups of elements in parallel, each group being formed of twenty polymer elements in series.
  • circuit breaker D opens very quickly. The current goes out in circuit breaker D and derives in the set of elements P1 to P4.
  • the current causes very rapid heating (one to two milliseconds for example) of the polymer elements whose ohmic resistance, beyond a certain threshold of temperature, for example 110 ° C, increases by a factor that can reach 100. This sudden increase in resistance of the group of polymer elements makes it possible to limit the fault current.
  • the residual current is cut by the circuit breaker d which opens for example 20 ms after the appearance of the fault.
  • Fig. 3 shows how the implementation is carried out parallel of two groups G1 and G2 of 4 elements P1 to P4 and Q1 to Q4.
  • Fig.4 illustrates an alternative embodiment in which the currents in the two conductors of each polymer element have the same meaning.
  • the two conductors of an element lead respectively out of the matrix at opposite ends.
  • Fig. 4 shows a assembly of 4 elements P'1, P'2, P'3, P'4 arranged side by side and in contact two by two by the long side of their lateral surface.
  • the connections C'1, C'2, C'3 are not on the same side but alternated.
  • References B'1 and B'2 designate insulating assembly strips.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Push-Button Switches (AREA)
  • Cable Accessories (AREA)

Claims (9)

  1. Hochspannungs-Polymer-Strombegrenzer, der pro Phase einen Pol eines schnellen Trennschalters (D), einen Pol eines mittelschnellen Trennschutzschalters (d) und eine Anordnung von Elementen auf Grundlage von mit Rußschwarz beaufschlagtem Polymer mit sehr geringem spezifischen Widerstand in Reihe und parallel montiert umfasst, dadurch gekennzeichnet, dass die Elemente eine Matrix (4) aus kohlenstoffbeaufschlagtem Polymer mit einer länglichen Form umfassen, die in ihrem Inneren zwei parallele metallische Leiter (2, 3) aufweist.
  2. Begrenzer nach Anspruch 1, dadurch gekennzeichnet, dass die Matrix (4) einen gestreckten Querschnitt hat.
  3. Begrenzer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Matrix (4) von einer Hülse (5) aus isolierendem Material umgeben ist.
  4. Begrenzer nach Anspruch 3, dadurch gekennzeichnet, dass das Material der Hülse (5) ein fluorhaltiges Polymer ist.
  5. Begrenzer nach Anspruch 1, dadurch gekennzeichnet, dass die zwei Leiter (2, 3) eines Elements an einem gleichen Ende aus der Matrix (4) austreten und dass eine Gruppe von in Reihe geschalteten Elementen aus einem Verband von Elementen (P1, P2, P3, P4) besteht, die nebeneinander und paarweise in Kontakt an den kleinen Seiten ihrer seitlichen Oberfläche angeordnet sind und durch an einer gleichen Seite der Anordnung angeordnete Verbindungen (C1, C2, C3) verbunden sind.
  6. Begrenzer nach Anspruch 1, dadurch gekennzeichnet, dass die zwei Leiter (2, 3) eines Elements aus der Matrix (4) an jeweils entgegengesetzten Enden austreten und dass eine Gruppe von in Reihe geschalteten Elementen aus einem Verband von Elementen (P'1, P'2, P'3, P'4) besteht, die nebeneinander und paarweise in Kontakt an den großen Seiten ihrer seitlichen Oberfläche angeordnet sind und durch abwechselnd an beiden Seiten der Anordnung angeordnete Verbindungen (C'1, C`2, C'3) verbunden sind.
  7. Begrenzer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der spezifische elektrische Widerstand des mit Rußschwarz beaufschlagten Polymers ca. 1 Ωxcm beträgt.
  8. Begrenzer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Länge (L) eines Elements ca. 1000 mm beträgt.
  9. Begrenzer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Abstand (e) zwischen den parallelen Leitern (2, 3) eines Elements ca. 10 mm beträgt.
EP97400880A 1996-04-26 1997-04-21 Hochspannungsstrombegrenzer auf Polymerbasis Expired - Lifetime EP0803881B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605304 1996-04-26
FR9605304A FR2748166B1 (fr) 1996-04-26 1996-04-26 Limiteur de courant a polymere a haute tension

Publications (2)

Publication Number Publication Date
EP0803881A1 EP0803881A1 (de) 1997-10-29
EP0803881B1 true EP0803881B1 (de) 1999-08-25

Family

ID=9491631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400880A Expired - Lifetime EP0803881B1 (de) 1996-04-26 1997-04-21 Hochspannungsstrombegrenzer auf Polymerbasis

Country Status (6)

Country Link
US (1) US5977862A (de)
EP (1) EP0803881B1 (de)
AT (1) ATE183849T1 (de)
DE (1) DE69700445T2 (de)
ES (1) ES2135970T3 (de)
FR (1) FR2748166B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008313A1 (de) * 2005-02-17 2006-08-24 Siemens Ag Schaltwiderstand für ein elektrisches Schaltgerät

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US649388A (en) * 1899-06-08 1900-05-08 Westinghouse Electric & Mfg Co Lightning-arrester.
US2769071A (en) * 1953-04-10 1956-10-30 Frank L Ward Bridge balancing devices
US2988722A (en) * 1960-08-16 1961-06-13 Allen Bradley Co High voltage resistor
US3213402A (en) * 1961-03-28 1965-10-19 Tassara Luigi Encapsulated high precision resistor
US3249810A (en) * 1962-11-20 1966-05-03 Westinghouse Electric Corp Circuit interrupting apparatus
US3340382A (en) * 1965-05-03 1967-09-05 Arc O Vec Inc Multi-cell electrical heater
US3543002A (en) * 1968-02-20 1970-11-24 Milletron Inc Quartz heater pack
CH559447A5 (de) * 1973-05-21 1975-02-28 Bbc Brown Boveri & Cie
US4876440A (en) * 1976-12-13 1989-10-24 Raychem Corporation Electrical devices comprising conductive polymer compositions
US4475138A (en) * 1980-04-21 1984-10-02 Raychem Corporation Circuit protection devices comprising PTC element
US4352083A (en) * 1980-04-21 1982-09-28 Raychem Corporation Circuit protection devices
US4400614A (en) * 1980-05-19 1983-08-23 Raychem Corporation PTC Devices and their preparation
FR2506067A1 (fr) * 1981-05-15 1982-11-19 Alsthom Atlantique Disjoncteur a haute tension
US4560524A (en) * 1983-04-15 1985-12-24 Smuckler Jack H Method of manufacturing a positive temperature coefficient resistive heating element
US4859836A (en) * 1983-10-07 1989-08-22 Raychem Corporation Melt-shapeable fluoropolymer compositions
US4780598A (en) * 1984-07-10 1988-10-25 Raychem Corporation Composite circuit protection devices
US4884163A (en) * 1985-03-14 1989-11-28 Raychem Corporation Conductive polymer devices
FI861646L (fi) * 1985-04-19 1986-10-20 Raychem Gmbh Vaermningsanordning.
US4967176A (en) * 1988-07-15 1990-10-30 Raychem Corporation Assemblies of PTC circuit protection devices
US5247277A (en) * 1990-02-14 1993-09-21 Raychem Corporation Electrical devices
JPH0448701A (ja) * 1990-06-15 1992-02-18 Daito Tsushinki Kk 自己復帰形過電流保護素子
US5379022A (en) * 1993-05-03 1995-01-03 Fluke Corporation Thermistor device with extended operating range
US5737160A (en) * 1995-09-14 1998-04-07 Raychem Corporation Electrical switches comprising arrangement of mechanical switches and PCT device

Also Published As

Publication number Publication date
FR2748166A1 (fr) 1997-10-31
ES2135970T3 (es) 1999-11-01
ATE183849T1 (de) 1999-09-15
FR2748166B1 (fr) 1998-06-05
DE69700445T2 (de) 2000-02-24
US5977862A (en) 1999-11-02
DE69700445D1 (de) 1999-09-30
EP0803881A1 (de) 1997-10-29

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