EP0275772B1 - Gehäuse für elektrische Vorrichtung, insbesondere für Überspannungsableiter, mit einer isolierenden Formumhüllung - Google Patents

Gehäuse für elektrische Vorrichtung, insbesondere für Überspannungsableiter, mit einer isolierenden Formumhüllung Download PDF

Info

Publication number
EP0275772B1
EP0275772B1 EP87402925A EP87402925A EP0275772B1 EP 0275772 B1 EP0275772 B1 EP 0275772B1 EP 87402925 A EP87402925 A EP 87402925A EP 87402925 A EP87402925 A EP 87402925A EP 0275772 B1 EP0275772 B1 EP 0275772B1
Authority
EP
European Patent Office
Prior art keywords
envelope
cylindrical
enclosure
enclosure according
electrode
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
EP87402925A
Other languages
English (en)
French (fr)
Other versions
EP0275772A1 (de
Inventor
Guy St-Jean
André Hamel
Michel Bourdages
Daniel Dumont
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.)
Hydro Quebec
Original Assignee
Hydro Quebec
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 Hydro Quebec filed Critical Hydro Quebec
Priority to AT87402925T priority Critical patent/ATE56321T1/de
Publication of EP0275772A1 publication Critical patent/EP0275772A1/de
Application granted granted Critical
Publication of EP0275772B1 publication Critical patent/EP0275772B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/04—Housings
    • 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
    • H01C7/10—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 voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors

Definitions

  • the present invention relates to an electrical device box of the type comprising an outer casing made of molded insulating material.
  • the present invention relates more particularly but not exclusively to a cylindrical arrester housing of this type.
  • the surge arrester is an electrical device that is connected in parallel with another electrical device and which has the function of reducing the overvoltages that may occur at the terminals of the latter.
  • the surge arrester therefore makes it possible to reduce the level of insulation of the electrical appliance and consequently its production cost. More specifically, the arrester is normally an open circuit which becomes a closed circuit parallel to the protected device as soon as a significant overvoltage appears across its terminals.
  • the surge arresters currently available on the market and which are used in electrical energy transport or distribution networks are largely made up of a porcelain shell having the general appearance of a cylindrical tube sometimes closed at one end and which has inside a column of varistors in the form of pellets.
  • the varistors are electrically active elements made up of metal oxide or else silicon carbide, and whose impedance varies non-linearly under the effect of an overvoltage so as to provide adequate protection.
  • the varistors are permanently short-circuited and this results in an electric arc inside the enclosure which generates explosive overpressures as well as temperatures exceeding the melting point of all known metals.
  • pressure relief valves In order to avoid the explosion of the lightning protection enclosures following an internal short circuit, pressure relief valves have been designed in the past, which transfer the electric arc outside using diaphragms and nozzles d 'orientation of hot gases, so as to eliminate internal overpressures.
  • the present invention therefore proposes to replace the use of porcelain, which has the various drawbacks discussed above, in particular but not exclusively by the use of a synthetic insulator of the type described above in the manufacture of an envelope. insulating molded for surge arrester, and more generally in the manufacture of an insulating envelope molded for an electrical device.
  • the envelope is made of an insulating material capable of withstanding a high mechanical tension, and molded on the internal jacket and around the anchoring means, so that the internal wall is integrated into the envelope and the anchoring means are firmly fixed to the insulating material constituting the external envelope.
  • the outer shell is made of an insulating material capable of withstanding a high mechanical tension.
  • This envelope is molded on the inner jacket and around the electrode and the first and second anchoring means, so that the inner jacket and the electrode are integrated into the cylindrical envelope, and that the first and second means d anchorages are firmly attached to the insulating material constituting the outer casing.
  • the insulating material constituting the envelope of the housing according to the invention can be, as already mentioned, a synthetic insulator in particular of concrete-epoxy, concrete-polymer or other type.
  • a synthetic insulator in particular of concrete-epoxy, concrete-polymer or other type.
  • the aggregate is sand and the binder is epoxy, while in the case of polymer concrete, the aggregate is inter alia sand and the binder is a synthetic resin .
  • the insulating material constituting the envelope which can in particular be constituted by a synthetic insulator, makes it possible to construct lightning arresters of electrical energy distribution networks totally resistant to explosions and envelope breakage, at a cost comparable to conventional distribution surge arresters which are liable to explosion.
  • the arrester housing comprises an outer insulating jacket 1 which has the general shape of a vertical cylindrical tube.
  • the casing 1 comprises a closed lower end and an open upper end.
  • the casing 1 is made of an insulating material, in particular a synthetic insulator of the concrete-epoxy, concrete-polymer or other type.
  • This envelope 1 is molded on an internal jacket 2 and around an electrode 3 and anchors for bolts 4 and 5. In this way, the internal wall 2 and the electrode 3 are integrated into the envelope 1, while that the anchors 4 and 5 are firmly fixed to the insulating material constituting the casing 1 since the latter is capable of withstanding a high mechanical tension.
  • the inner wall of the envelope 1 and therefore the inner jacket 2 have the shape of a truncated cone which defines an angle 6 suitable for easily removing the interior mold when the molding of the envelope 1 is completed.
  • the angle 6 of the truncated cone also facilitates the expansion of the gases produced by an electric arc occurring inside the housing of FIG. 1 towards an upper pressure limiting mechanism, which will be explained in more detail in the description which follows.
  • the outer profile of the casing 1 defines a plurality of annular fins such as 7.
  • the fins 7 provide dielectric maintenance of the casing 1 under rain and pollution conditions. Obviously, these fins 7 also contribute to increasing the mechanical resistance of the envelope to internal pressures.
  • the angles 8 and 9 of the fins 7 allow the external mold to be easily removed following the molding of the envelope 1.
  • the electrode 3 has a main portion internal to the housing and centered on the vertical geometric axis 10 thereof.
  • the electrode 3 further comprises an extension which crosses the casing 1 radially and which extends up to a certain distance outside the casing 1 which is suitable for making an external electrical connection and for attracting and receiving the electric arc as will be described below.
  • FIGS. 2 to 5 illustrate a surge arrester using the housing described above with reference to Figure 1 of the drawings.
  • the casing 1 is mounted on a mechanical support 12 using three bolts 13 inserted in the three anchors 4.
  • Figure 3 shows precisely the position of the three anchors 4 and associated bolts 13.
  • bulges such as 14 are provided around each of the anchors 4.
  • the outer profile of the casing 1 lower than the electrode 3 is designed so as to ensure adequate dielectric rigidity between the electrode 3 and the conductive parts associated with the mechanical support 12 over the distances 15, 16 and 17 while minimizing the volume required of the insulating material in the manufacture of the casing 1, and consequently the mass and the cost of the arrester.
  • the external profile of the casing 1 lower than the electrode 3 comprises the lower fin 7 ', a flange 18 and a recess 19 identified in Figure 2 of the drawings.
  • the arrester further comprises a column of varistors such as 20 each having the shape of a patch, this column being centered on the geometric axis 10.
  • the column of varistors 20 is retained in place by means of a spring.
  • mechanical support 21 suitably mounted between the internal portion of the electrode 3 and the varistor column 20, and using the arrester closing device.
  • the internal portion of the electrode 3 comprises an upper part of reduced horizontal section which makes it possible to hold the spring 21.
  • a connector 23 parallel to the mechanical holding spring 21 establishes electrical contact between the underside of the column of varistors 20 and the electrode 3.
  • the device for closing the arrester which consists of a pressure limiting mechanism, firstly comprises an annular cover 24 which is electrically conductive and securely fixed to the casing 1 by means of three bolts 25 associated with the three anchors 5.
  • three holes 26 drilled through the cover 24 to allow its attachment to the casing 1 using the anchors 5 and bolts 25 are provided with an upper recess such as 27 so that the head of the bolts 25 does not exceed the upper surface of the cover 24 so as not to interfere with the fitting of the other elements of the pressure limiting mechanism which are described below.
  • Figures 4 and 5 clearly show the position of the three holes 26, the three bolts 25, and therefore the three anchors 5. More specifically, the anchors 5 are separated from each other d '' an angle of 120 ° to the vertical axis 10.
  • An annular rubber seal 28 (see Figure 2) seals against humidity between the cover 24 and the casing 1.
  • the cover 24 defines an annular corner 29 in which is positioned a centering and holding piece 30 of the varistor column 20.
  • the upper pad 20 ′ (varistor) rests on the piece 30 so that the varistor column 20 can be kept centered thanks to the compressive force exerted by the spring 21.
  • the centering and holding part 30 has a central opening 30 ', and three peripheral passages 31 allowing the escape of gases when an overpressure occurs inside the arrester housing.
  • Figure 4 shows several holes 32 each provided with a thread and which are formed in the cover 24. These holes are used for fixing screws 33 ( Figure 5) provided for fixing on the top of the arrester a diaphragm 34 and a hot gas exhaust nozzle 35.
  • the diaphragm 34 is usually made of a sheet of plastic or of thin aluminum, and is mounted between the circular lower contour 35 ′ of the nozzle 35, and the cover 24.
  • An annular seal 36 of rubber or other elastic material (FIG. 2) seals against humidity between the diaphragm 34 and the cover 24.
  • the cover 24 finally comprises, as illustrated in FIG. 4, a cylindrical hole 37 provided with a thread and making it possible to mount the upper electrical terminal 38 of the arrester.
  • the electrode 3 ( Figure 2) extends outside the casing 1 to a distance sufficient to make an electrical connection with the external circuit using an explosive bolt 39 mounted in a hole 11 ( see Figures 1 and 3) made at the free outer end of the extension of the electrode 3.
  • the extension distance of the electrode 3 outside the casing 1 must also be adequate to attract and receive the arc electric transferred from the inside to the outside of the arrester box.
  • the current from the external circuit to which the surge arrester is electrically connected enters via the upper terminal 38 (arrow 40 in Figure 2). It then passes through the cover 24 to which the terminal 38, the part 30 is connected, and is transmitted to the varistor column 20 (see arrows 41, 42 and 43). It then leaves the varistor column 20 to be transmitted to the electrode 3 through the connector 23 (see arrow 44). The current then feeds the circuit connected to the electrode 3 by the bolt 39 (see arrow 45).
  • an internal electric arc 46 occurs and creates an overpressure which perforates the diaphragm 34 thus allowing the hot gases to be evacuated through the passages 31 and the nozzle 35 towards the integrated electrode 3 thus creating an arc 47 between the nozzle 35 which is made of an electrically conductive material and the external extension of the electrode 3.
  • the arc is thus transferred from the interior to the outside of the arrester housing. Such an arc transfer makes it possible to release the interior of the envelope 1 from the pressures and temperatures which could cause it to explode.
  • a steel blade 48 can also be mounted inside the nozzle 35 in order to facilitate the perforation of the diaphragm 34 during the production of a overpressure inside the arrester housing. More specifically, the blade 48 cuts the diaphragm 34 during its deformation due to internal removal.
  • the inner liner 2 can be made of several materials, such a frosted glass liner ensures both the sealing of the casing 1 against humidity and the protection of this casing against breakage by thermal shock due to the contact of the interior electric arc 46. In fact, during the production of the arc 46, the glass will be touched and will break, thereby preventing the envelope 1 from breaking, which could cause it to explode.
  • the circuit connected to the bolt 39 will be separated from the electrode 3.
  • a bolt explosive such as 39 contains a powder charge, the explosion of which is caused by too large a current (current flowing in the electric arc 46 or 47). A sufficient distance will then be created between the external electrical circuit and the electrode 3 to isolate the arrester from earth when the fault current is interrupted by the circuit breaker provided for this purpose in the electrical supply network.
  • the internal electric arc 46 will usually create a permanent conductive path between the part 30 and the electrode 3 so that following the recharging of the external circuit, the upper terminal 38 is connected to the electrode 3 and the normal network voltage is found on this electrode during normal reclosing of the circuit breaker.
  • the envelope 1 of the surge arrester must then provide adequate electrical insulation between the live electrode 3 and the conductive parts associated with the metallic mechanical support 12 which in several cases are connected to earth. This is the reason why, as already mentioned in the present description, the electrical insulation over the distances 15, 16 and 17 of FIG. 2, must be optimized to ensure adequate dielectric strength between the electrode 3 and the conductive parts associated with the support 12.
  • the housing according to the invention makes it possible to produce distribution surge arresters which are totally explosion-proof and casing breakage by thermal shock, and at a lower cost than conventional distribution surge arresters liable to explosion. , as previously mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Insulators (AREA)
  • Organic Insulating Materials (AREA)
  • Motor Or Generator Frames (AREA)
  • Casings For Electric Apparatus (AREA)

Claims (22)

1. Gehäuse für eine elektrische Vorrichtung, dadurch gekennzeichnet, daß sie umfaßt:
einen äußeren Mantel (1),
eine Innenbuchse (2), die aus einem elektrisch nicht-leitenden Werkstoff besteht und eine Dichtigkeit gegenüber Feuchtigkeit aufweist und einen Schutz gegen Bruch des äußeren Mantels (1) durch thermischen Schock gewährleistet, der durch die im Inneren des Gehäuses erzeugte Wärme verursacht wird, und
Verankerungseinrichtungen (4) zur Befestigung des Gehäuses auf einer mechanischen Halterung (12),
daß der Mantel (1) durch einen Isolierstoff gebildet wird, der eine höhere mechanische Spannung aushalten kann und der auf der Innenbuchse (2) und um die Verankerungseinrichtungen (4) geformt ist, so daß die Innenbuchse (2) fest am Mantel (1) angebracht ist, und die Verankerungseinrichtungen (4) fest am Isolierstoff befestigt sind, der den äußeren Mantel (1) bildet.
2. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß der äußere Mantel (1) zylindrisch ist.
3. Gehäuse nach Anspruch 2, dadurch gekennzeichnet, daß der zylindrische Mantel (1) eine Innenwand aufweist, die die Form eines Kegelstumpfes hat.
4. Gehäuse nach Anspruch 2, dadurch gekennzeichnet, daß der zylindrische Mantel (1) eine geometrische Achse (10) hat und eine Anzahl äußerer ringförmiger Rippen (7) aufweist, von denen jede in einer Ebene liegt, die senkrecht zur geometrischen Achse (10) verläuft.
5. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die Verankerungseinrichtungen eine Anzahl von Verankerungen (4) für Gewindebolzen aufweisen.
6. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß es eine Öffnung und zusätzliche Verankerungseinrichtungen (5) hat, um auf dem Gehäuse eine Verschlußvorrichtung für diese Öffnung zu montieren, und daß der Mantel (1) um die zusätzlichen Verankerungseinrichtungen (5) derart geformt ist, daß diese fest auf dem Isolierstoff befestigt sind, der den äußeren Mantel (1) bildet.
7. Gehäuse nach Anspruch 6, dadurch gekennzeichnet, daß die zusätzlichen Verankerungseinrichtungen eine Anzahl von Verankerungen (5) für Gewindebolzen bilden.
8. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß es ferner eine Elektrode (3) umfaßt, die einen im Inneren des Gehäuses liegenden Hauptabschnitt und eine Verlängerung aufweist, die sich ausgehend vom inneren Hauptabschnitt durch den äußeren Mantel (1) bis zum Außenbereich des Gehäuses erstreckt, und daß der Mantel (1) derart um die Elektrode (3) geformt ist, daß diese fest mit dem äußeren Mantel (1) verbunden ist.
9. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß der Werkstoff, der den äußeren Mantel (1) bildet, einen synthetischen Isolierstoff umfaßt.
10. Gehäuse nach Anspruch 9, dadurch gekennzeichnet, daß der synthetische Isolierstoff Beton-Epoxid umfaßt.
11. Gehäuse nach Anspruch 9, dadurch gekennzeichnet, daß der synthetische Isolierstoff Beton-Polymeres umfaßt.
12. Zylindrisches Gehäuse für einen Überspannungsableiter, dadurch gekennzeichnet, daß es umfaßt:
einen zylindrischen äußeren Mantel (1) mit einem ersten geschlossenen Ende und einem zweiten offenen Ende,
eine Innenbuchse (2), die aus einem elektrisch nicht-leitenden Werkstoff besteht und die eine Dichtigkeit gegenüber Feuchtigkeit aufweist und einen Schutz gegen Bruch des zylindrischen Mantels (1) durch thermischen Schock gewährleistet, der durch Erzeugung eines elektrischen Lichtbogens (46) im Inneren des Gehäuses verursacht ist, eine am geschlossenen Ende des zylindrischen Mantels (1) angeordnete Elektrode (3), die einen im Inneren des Gehäuses liegenden Hauptabschnitt und eine Verlängerung aufweist, . die sich ausgehend vom inneren Hauptabschnitt durch den äußeren Mantel (1) bis zum Außenbereich des Gehäuses erstreckt,
erste Verankerungseinrichtungen (4), die am geschlossenen Ende des äußeren Mantels (1) montiert sind, um das Gehäuse auf einer mechanischen Halterung (12) zu befestigen, und
zweite Verankerungseinrichtungen (5), die am offenen Ende des zylindrischen Mantels (1) montiert sind, um eine Verschlußvorrichtung des Gehäuses zu befestigen, wobei der Mantel (1) aus einem Isolierstoff besteht, der eine hohe mechanische Spannung verträgt und auf der Innenbuchse (2) und um die Elektrode (3) und die erste (4) und zweite (5) Verankerungseinrichtung geformt ist, so daß die Innenbuchse (2) und die Elektrode (3) fest mit dem zylindrischen Mantel (1) verbunden sind, und die erste (4) und die zweite (5) Verankerungseinrichtung fest am Isolierstoff befestigt sind, der den äußeren Mantel (1) bildet.
13. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß die erste und die zweite Verankerungseinrichtung (4, 5) Verankerungen für Gewindebolzen umfassen.
14. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß das geschlossene Ende des zylindrischen Mantels (1) eine äußere Ausnehmung (19) und mindestens eine äußere ringförmige Rippe (7') umfaßt, die den Mantel (1) umgibt und eine ausreichende elektrische Isolierung zwischen der Elektrode (3) und der mechanischen Halterung (12) gewährleistet, wobei der zylindrische Mantel (1) eine geometrische Achse (10) hat und die ringförmige Rippe (7') in einer Ebene liegt, die senkrecht zur geometrischen Achse (10) verläuft.
15. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß der Mantel (1) eine geometrische Achse (10) hat und eine Anzahl äußerer ringförmiger Rippen (7) aufweist, wovon jede in einer Ebene liegt, die senkrecht zur geometrischen Achse (10) verläuft.
16. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß der zylindrische Mantel (1) eine Innenwand bildet, der die Form eines Kegelstumpfs aufweist, der einen Durchmesser hat, der sich ausgehend vom geschlossenen Ende gegen das offene Ende des Mantels (1) hin vergrößert, und daß die Innenbuchse (2) ebenfalls die Form eines Kegelstumpfs hat.
17. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß der nicht-leitende Werkstoff, der die Innenbuchse (2) bildet, mattiertes Glas umfaßt.
18. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß der Isolierstoff, der den äußeren Mantel (1) bildet, einen synthetischen Isolierstoff umfaßt.
19. Zylindrisches Gehäuse nach Anspruch 18, dadurch gekennzeichnet, daß der synthetische lsolierstoff Beton-Epoxid umfaßt.
20. Zylindrisches Gehäuse nach Anspruch 18, dadurch gekennzeichnet, daß der synthetische Isolierstoff Beton-Polymeres umfaßt.
21. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß die Verlängerung der Elektrode (3) radial durch den zylindrischen Mantel (1) hindurchtritt.
22. Zylindrisches Gehäuse nach Anspruch 12, dadurch gekennzeichnet, daß die Verschlußeinrichtung des Gehäuses Druckbegrenzungseinrichtungen (31, 34, 35, 48) umfaßt.
EP87402925A 1986-12-23 1987-12-18 Gehäuse für elektrische Vorrichtung, insbesondere für Überspannungsableiter, mit einer isolierenden Formumhüllung Expired - Lifetime EP0275772B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402925T ATE56321T1 (de) 1986-12-23 1987-12-18 Gehaeuse fuer elektrische vorrichtung, insbesondere fuer ueberspannungsableiter, mit einer isolierenden formumhuellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000526139A CA1263162A (fr) 1986-12-23 1986-12-23 Boitier de dispositif electrique, notamment de parafoudre, incluant une enveloppe isolante moulee
CA526139 1986-12-23

Publications (2)

Publication Number Publication Date
EP0275772A1 EP0275772A1 (de) 1988-07-27
EP0275772B1 true EP0275772B1 (de) 1990-09-05

Family

ID=4134619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402925A Expired - Lifetime EP0275772B1 (de) 1986-12-23 1987-12-18 Gehäuse für elektrische Vorrichtung, insbesondere für Überspannungsableiter, mit einer isolierenden Formumhüllung

Country Status (9)

Country Link
US (1) US4827370A (de)
EP (1) EP0275772B1 (de)
JP (1) JPS63245831A (de)
AT (1) ATE56321T1 (de)
CA (1) CA1263162A (de)
DE (1) DE3764794D1 (de)
ES (1) ES2017104B3 (de)
GR (1) GR3001140T3 (de)
MX (1) MX168857B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1314949C (fr) * 1989-08-16 1993-03-23 Michel Bourdages Parafoudre pourvu de tuteurs mobiles de maintien de ses varistances
US5444429A (en) * 1993-11-15 1995-08-22 Hubbell Incorporated Electrical assembly with surge arrester and insulator
US5585611A (en) * 1994-03-31 1996-12-17 Abb Power T&D Company Inc. Interrupter assembly
US5912604A (en) * 1997-02-04 1999-06-15 Abb Power T&D Company, Inc. Molded pole automatic circuit recloser with bistable electromagnetic actuator
ES2166689B1 (es) * 2000-01-26 2003-10-16 Ind De Aparellaje Electrico S Descargador de sobretensiones.
US8125308B1 (en) * 2009-04-02 2012-02-28 Bruce Barton Relocatable power tap with surge suppression or surge protection and a method for its manufacture
US20120144634A1 (en) * 2010-12-14 2012-06-14 Bruce Charles Barton Metal oxide varistor design and assembly
NZ621283A (en) * 2011-07-14 2015-11-27 Bruce Barton Relocatable power tap with surge suppression or surge protection and a method for its manufacture

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702419A (en) * 1971-09-28 1972-11-07 Westinghouse Electric Corp Lightning arrester with pressure relief means
JPS5857029B2 (ja) * 1976-05-20 1983-12-17 パイオニア株式会社 双方向ｃａｔｖシステム
US4424547A (en) * 1980-11-04 1984-01-03 General Electric Company Surge suppressor construction
US4404614A (en) * 1981-05-15 1983-09-13 Electric Power Research Institute, Inc. Surge arrester having a non-fragmenting outer housing
SE430443B (sv) * 1982-03-04 1983-11-14 Asea Ab Ventilavledare
JPS6070702A (ja) * 1983-09-26 1985-04-22 株式会社日立製作所 防爆形酸化亜鉛避雷器
US4484247A (en) * 1984-03-09 1984-11-20 General Electric Company Nonfragmenting station arrester
CH666574A5 (de) * 1984-06-01 1988-07-29 Bbc Brown Boveri & Cie Ueberspannungsableiter.
DE3508030A1 (de) * 1985-02-07 1986-08-07 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Verfahren zur herstellung eines ueberspannungsableiters unter verwendung eines aktiven widerstandskoerpers aus einem spannungsabhaengigen widerstandsmaterial auf zno-basis und danach hergestellter ueberspannungsableiter
CH666575A5 (de) * 1985-02-26 1988-07-29 Bbc Brown Boveri & Cie Ueberspannungsableiter.

Also Published As

Publication number Publication date
DE3764794D1 (de) 1990-10-11
US4827370A (en) 1989-05-02
ATE56321T1 (de) 1990-09-15
JPS63245831A (ja) 1988-10-12
EP0275772A1 (de) 1988-07-27
MX168857B (es) 1993-06-11
ES2017104B3 (es) 1991-01-01
CA1263162A (fr) 1989-11-21
GR3001140T3 (en) 1992-06-25

Similar Documents

Publication Publication Date Title
EP2096657B1 (de) Vorrichtung zum Schutz gegen Überspannungen, die selektive Unterbrechungsmittel umfasst
WO2009106731A2 (fr) Isolation d'un dispositif de coupure de type ampoule a vide par surmoulage
CA1314949C (fr) Parafoudre pourvu de tuteurs mobiles de maintien de ses varistances
EP0275772B1 (de) Gehäuse für elektrische Vorrichtung, insbesondere für Überspannungsableiter, mit einer isolierenden Formumhüllung
FR2468201A1 (fr) Microparafoudre a fort pouvoir d'ecoulement
EP1743346A1 (de) Überspannungsschutzeinrichtung mit lichtbogenlöschelementen
EP0318339A1 (de) Funkenstrecken-Überspannungsableiter mit wenigstens einem Schmelzleiter
EP1815569B1 (de) Überspannungsschutzeinrichtung mit verbesserter trennung
FR2574589A1 (fr) Dispositif de mise en court-circuit exterieur de faible encombrement
FR2772197A1 (fr) Dispositif de connexion, puis d'isolement et de deconnexion d'un parafoudre
FR2843243A1 (fr) Dispositif de protection d'un reseau de distribution d'energie electrique
FR2641423A1 (fr) Dispositif parafoudre pour la protection des lignes electriques
CA2069800C (fr) Dispositif de protection contre les effets d'un claquage pour extremite de cable electrique
EP0782753A1 (de) Überspannungsableiter
EP1830369B1 (de) Vorrichtung zum Schutz gegen Überspannungen mit vereinfachtem Aufbau und verbesserter Zuverlässigkeit
CA2472900A1 (fr) Dispositif a circuits hybrides hyperfrequences a blindage par element(s) de contact elastique(s)
EP2006874B1 (de) Vorrichtung zur Spannungsunterbrechung durch Sicherung bei Überstrom und Schutzvorrichtung gegen Überspannungen, die mit einer solchen Unterbrechungsvorrichtung ausgestattet ist
EP3836185B1 (de) Hochspannungselektrogerät, das eine explosionsschutzvorrichtung umfasst
EP1337018A1 (de) Gasisolierte Stromdurchführung
FR2670624A1 (fr) Court-circuit et boitier pour parafoudre.
FR2629263A1 (fr) Dispositif de protection pour appareil electrique a moyenne tension
CA2091321C (fr) Contact a inertie
EP0859382B1 (de) Gasisolierter Transformator
EP2383853B1 (de) Baugruppe aus einer Schutzhülle und einem Blitzableiter mit Zündvorrichtung
FR2983361A1 (fr) Dispositif electrique amovible de protection a usage unique et son utilisation dans une installation de production photovoltaique d'energie electrique d'origine solaire

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19880808

17Q First examination report despatched

Effective date: 19891010

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 56321

Country of ref document: AT

Date of ref document: 19900915

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3764794

Country of ref document: DE

Date of ref document: 19901011

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3001140

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 87402925.9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961030

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19961101

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19961118

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19961121

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19961125

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961127

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19961205

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19961210

Year of fee payment: 10

Ref country code: GB

Payment date: 19961210

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961218

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970116

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971218

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971218

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971219

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19971219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

BERE Be: lapsed

Owner name: HYDRO-QUEBEC

Effective date: 19971231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971218

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19980701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980901

EUG Se: european patent has lapsed

Ref document number: 87402925.9

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051218