EP2641306B1 - Dispositif formant goulotte d'expulsion pour un limiteur de surtension, limiteur de surtension et jeu de limiteurs de surtensions montés en série - Google Patents

Dispositif formant goulotte d'expulsion pour un limiteur de surtension, limiteur de surtension et jeu de limiteurs de surtensions montés en série Download PDF

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Publication number
EP2641306B1
EP2641306B1 EP12714600.9A EP12714600A EP2641306B1 EP 2641306 B1 EP2641306 B1 EP 2641306B1 EP 12714600 A EP12714600 A EP 12714600A EP 2641306 B1 EP2641306 B1 EP 2641306B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
ausblasschute
drainage channel
chute
opening
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.)
Not-in-force
Application number
EP12714600.9A
Other languages
German (de)
English (en)
Other versions
EP2641306A1 (fr
Inventor
Erhard Pippert
Ingo Gottschalk
Dirk Springborn
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2641306A1 publication Critical patent/EP2641306A1/fr
Application granted granted Critical
Publication of EP2641306B1 publication Critical patent/EP2641306B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01T1/00—Details of spark gaps
    • H01T1/15—Details of spark gaps for protection against excessive pressure
    • 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
    • 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
    • H01C7/123—Arrangements for improving potential distribution

Definitions

  • the invention relates to a Ausblasschute for a surge arrester, wherein the Ausblasschute for back-to-back attachment of a second Ausblasschute are provided and arranged, the Ausblasschute at least one blow-off with at least one blow-off, the at least one blow-out respectively fluidly with at least one water drainage channel is connected and the at least one water drainage channel has at least one outwardly opening water outlet opening.
  • the invention further relates to a surge arrester having at least one exhaust barge.
  • the invention also relates to a set of at least two surge arresters arranged in series, wherein at least two adjacently arranged surge arresters are connected to one another in each case with one of their discharge bars in a back-to-back attachment.
  • the Ausblasschuten are arranged at a longitudinal end of the high voltage arrester.
  • the discharge chutes are used, in the case of voltage drop, to discharge hot gases leaving the high-voltage arrester in a controlled manner through an associated discharge channel and through an exhaust opening to the outside.
  • the exhaust opening usually opens in the direction of a longitudinal axis of the high-voltage arrester or of the exhaust bar, in the direction along the high-voltage arrester, in order to keep the exiting hot gases in a narrow region around the high-voltage arrester.
  • the exhaust opening is aligned in the direction of the high-voltage arrester and parallel thereto.
  • the exhaust openings In a downwardly opening exhaust barge, which is located at the upper end of the high-voltage arrester, the exhaust openings open downward, in an upwardly opening lower Ausblasschute, which is located at the lower end of the high-voltage arrester, the exhaust openings open upwards.
  • the outlet bar opens upwards, rain can enter through the outlet openings and collect on the high voltage arrester without any further measures. Since standing water is to be avoided, the discharge chutes are equipped with vertically aligned water drainage holes.
  • a Ausblasschute according to the preamble of claim 1 is made DE-30 32 852 A1 known.
  • a Ausblasschute for a surge arrester wherein the Ausblasschute for back-to-back attachment provided with a second Ausblasschute and are arranged, the Ausblasschute at least one exhaust passage having at least one exhaust opening, the at least one exhaust duct in each case fluidly at least one water drainage channel is connected, the at least one water drainage channel has at least one outwardly opening water outlet opening and the at least a water outlet opening is arranged asymmetrically with respect to the back-to-back attachment.
  • the Ausblasschute may in particular be associated with at least one pressure relief device of the surge arrester or represent such.
  • the pressure relief device may in particular be a membrane.
  • the Ausblasschute may in particular have a seat for the membrane.
  • the exhaust barge can also be referred to as a blowout.
  • a blow-off channel may, in particular, be understood as an area or channel through which the hot gases pass or pass.
  • a back-to-back attachment may in particular be understood to mean a fastening in which two, in particular, identical discharge flutes are connected to one another, in particular by means of their respective fastening elements, and in particular are rotated through 180 ° relative to one another.
  • This rotation through 180 ° can in particular correspond to a reflection of one of the discharge chutes on a contact surface of the two discharge chutes, linked to a reflection on a plane perpendicular thereto.
  • a back-to-back attachment may also be understood to mean, in particular, a fastening in which the outlet bar has two sides, of which one side (also called the 'back' or the outside) has the fastening elements and the two outlet flutes in the back -to-back attachment with each side (directly or indirectly) can be fastened together.
  • the contact surface thus represents at least a part of the outside.
  • the fact that the at least one water outlet opening is arranged asymmetrically with respect to the back-to-back fastening may mean, in particular, that the at least one water outlet opening is arranged so that, in a back-to-back fastening, two, in particular the same or substantially same, Ausblasschuten the water outlet openings are laterally offset from each other, in particular with respect to a circumferential direction. In a vertical orientation of the associated surge arrester, the water outlet openings of the two Ausblasschuten are thus not on top of each other.
  • This Ausblasschute has the advantage that in the back-to-back attachment of two Ausblasschuten and thus typically also two surge arresters in series is prevented, that can escape from the water outlet opening of an overhead exhaust barge following water in an underlying water outlet opening of the other Ausblasschute.
  • the Ausblasschute may be formed in particular as a flange or as a flange.
  • a contact surface for contacting the other Ausblasschute be a flat surface in particular.
  • the contact surface may in particular be quadrangular or circular.
  • the contacting can be done directly, via a respective end element, in particular plate, or via a common intermediate element, in particular intermediate plate.
  • the Ausblasschute may further comprise at least one fastening element for the back-to-back attachment.
  • the at least one fastener may include, for example, at least one (smooth or threaded) through-hole or through-hole.
  • the Ausblasschute may in particular have a longitudinal axis and have a at least substantially rotationally symmetrical about the longitudinal axis basic shape by a certain angle of rotation.
  • the Ausblasschute a first side ("inside”) and a second side (“outside” or “Back”), wherein the second side has the contact surface for the back-to-back attachment and the first side is provided for attachment to the surge arrester.
  • blow-out is limited by the inside.
  • the blow-out channel may be formed substantially through the inside.
  • the exhaust passage terminates in a cup-shaped end region whose free edge defines the exhaust opening and that the water drain channel extends in a bottom of the cup-shaped end portion.
  • the cup-shaped end region may in particular be formed by means of a wall which has the bottom and a side wall raised from the bottom. The side wall can expand laterally in particular from the bottom. Characterized in that the water drainage channel extends in the bottom of the cup-shaped end portion, the associated water outlet opening is covered in the downwardly opening Ausblasschute of the side wall, so that no water can flow into it.
  • the at least one water drainage channel can be formed or covered in particular by means of a capped groove.
  • the groove may in particular extend in a one-piece body of the exhaust bar, wherein a cover on the base body is placed to cover the groove.
  • the lid may in particular be designed as a flat plate.
  • the at least one water drainage channel in a plate (“end plate” or “intermediate plate”) is introduced, which is connected to a main body of the Ausblasschute and on which the Ausblasschute with another Ausblasschute in a back-to-back -Fastening is fastened.
  • the main body of the exhaust bar may in particular have at least one fluid channel to the water drainage channel in the plate, e.g. one of the exhaust passage in the direction of the at least one water drainage channel through a wall of the Ausblasschute leading through hole.
  • the plate may be a plate associated only with a main body or Ausblasschute.
  • the plate may also be a plate attached to each other two together. The plate may then each have at least one water drainage channel for each of the two Ausblasschuten.
  • the water drainage channel at least at its adjoining the water outlet opening portion, extends substantially horizontally or substantially radially to a longitudinal axis of the blow-off bar.
  • the water drainage channel can be guided over a large length, in particular in the bottom of the cup-shaped end region, and consequently dehydrate the cup-shaped end region in a particularly effective manner.
  • the water drainage channel has a wall or wall region facing the blow-out channel, which is inclined towards the blow-off opening in the direction of the water outlet opening. This can be prevented in a downwardly open Ausblasschute that reaching the water outlet opening water flows into the water drainage channel, since its (with respect to the downwardly open arrangement) underside wall area or bottom in the direction of the water outlet opening is sloping.
  • the water drainage channel as a whole is inclined toward the blowout opening in the direction of the water outlet opening. This also can be prevented in a downwardly open Ausblasschute that reaching the water outlet opening water flows into the water drainage channel.
  • the water drainage channel may be in the form of a bore, for example.
  • the water outlet opening (with respect to a longitudinal axis) is arranged at least approximately at the height of the lowest point of the Ausblasschute (in an upwardly opening Ausblasschute).
  • the blow-out bar has a blow-out channel and in particular a cup-shaped region, in particular on a side wall of the blow-out bar. It is an alternative development that the blow-out bar has two blow-out channels and in particular two cup-shaped regions arranged on opposite sides of the blow-out bar. It is still an alternative development that the Ausblasschute has a plurality of Ausblaskanäle whose exhaust openings are arranged with respect to a circumferential direction substantially symmetrically with respect to a circumferential direction of the Ausblasschute. Also, a cup-shaped, in the circumferential direction circumferentially open Ausblasschute is possible in the profile.
  • a surge arrester which has at least one terminally arranged exhaust bar as described above, in particular two arranged at opposite ends Ausblasschuten.
  • the surge arrester may in particular be a high-voltage arrester or a medium-voltage arrester.
  • the at least one exhaust opening is directed in a direction along the surge arrester.
  • the object is also achieved by a set of at least two surge arresters arranged in series, wherein at least two adjacently arranged surge arresters are connected to one another in each case with one of their exhaust barges in a back-to-back fastening, wherein the exhaust barges are as described above.
  • the Ausblasschuten or their body can be directly connected.
  • the discharge chutes may alternatively be connected to one another via respective plates, the two plates lying flat on one another.
  • the plates may have a respective at least one water drainage channel.
  • the blow-out barges or their basic body are connected to one another via a common plate ("intermediate plate").
  • the intermediate plate may have a respective at least one water drainage channel for both Ausblasschuten.
  • a plate may form part of one or two blowout chutes.
  • a plate may represent a separate element to a blow-out.
  • Fig.1 shows in view obliquely from above an upper end of a standing surge arrester 1 arranged in the form of a high-voltage arrester with a terminally arranged there Ausblasschute.
  • Fig.2 shows the Ausblasschute 2 fragmentary as a sectional view in side view.
  • FIG 3 shows in a side view two Ausblasschuten 2, 2a in a back-to-back attachment.
  • the Ausblasschute 2 here has two parts, namely a base body 21, for example made of aluminum, and a cover plate 22nd
  • the blow-out bar 2 has in the main body 21 a blow-out channel 3, which terminates in a cup-shaped end region 4.
  • the cup-shaped end portion 4 protrudes from a side wall 5 of the Ausblasschute 2.
  • a free edge 6 of the cup-shaped end portion 4 defines an exhaust opening 7, which is directed in a direction along the surge arrester 1 (here: down).
  • the cup-shaped end region 4 is formed by means of a wall 8 which has a bottom 9 and a side wall 11 raised from the bottom 9 via a curved transition region 10. The side wall 11 widens from the bottom 9 coming.
  • the main body 21 of the Ausblasschute 2 in this case has an inner side 12 and an outer side 13 or "back", wherein the inner side 12 is provided for attachment to the surge arrester 1 and further the exhaust passage 3 is substantially limited or formed by means of the inner side 12.
  • the outer side 13 is covered by the end plate 22 surface.
  • blow-out bar 2 or its base body 21 is provided and arranged for attachment to a second (here: identical) blow-out bar 2a, or its base body 21a, as in FIG Figure 3 shown.
  • the base bodies 21 and 21a of the discharge chutes 2 and 2a are provided on their respective outer side 13 with four fastening elements 15 in the form of through holes or bores (see Fig.1 ).
  • the outer side 13 has a substantially closed square shape with rounded corners, wherein the fastening elements 15 are in the region of a respective corner.
  • the intermediate plate has a corresponding shape.
  • the end plate 22 is used by both bodies 21 and 21a and thus represents a common end plate 22 for both main body 21 and 21a and Ausblasschuten 2, 2a.
  • each of the Ausblasschuten have their own end plate.
  • the Ausblasschute is integrally formed and thus has no independent end plate.
  • the Ausblasschuten 2 and 2a can be fixed together in four, each rotated by 90 ° about its longitudinal axis L relative rotational positions, of which in Figure 3 the rotational position is shown in which the cup-shaped end portions 4 are superimposed.
  • This rotation through 180 ° corresponds to a reflection of one of the Ausblasschuten, eg 2a, at the end plate 22, associated with a reflection on a plane which is coplanar to the longitudinal axis L and symmetrically through the center of the cup-shaped end portion 4 runs.
  • the respective blow-out channel 3 is fluidically connected to a water drainage channel 16. This opens here with one end behind the cup-shaped end portion 4 in the exhaust duct 3 and has at its other end to an outwardly opening water outlet opening 17.
  • the water outlet opening 17 is arranged asymmetrically with respect to the back-to-back attachment. This means that the water outlet opening 17 is arranged asymmetrically, so that in a back-to-back attachment of the Ausblasschuten 2, 2a, the water outlet openings 17 are offset from each other with respect to a circumferential direction, as in Figure 3 shown.
  • the water outlet openings 17 of the two Ausblasschuten 2, 2a are thus not on top of each other, and it can not get water from an overhead water outlet openings 17 in an underlying water outlet openings 17.
  • the water drainage channel 16 extends substantially horizontally (perpendicularly or radially in relation to the longitudinal axis L) in the bottom 9 of the cup-shaped end region 4, so that the water drainage channel 16 is guided over a great length in the bottom 9.
  • the water outlet opening 17 is arranged in the transition region 10, whereby a large water outlet opening 17 in a simple manner even in a comparatively narrow water drainage channel 16 is provided.
  • the water outlet opening 17 is vertically open, in a direction opposite to the exhaust opening 7 direction.
  • the water drainage channel to a blow-out channel 7 facing (lower) wall 18 or wall area, which down to the exhaust opening 7 in the direction of the water outlet opening 17 is inclined.
  • the inclination is preferably about 3 ° to 5 ° from the horizontal.
  • the water drain channel 16 may be at least slightly inclined to the exhaust opening 7 in the direction of the water outlet opening 17. This also makes it possible to prevent a downwardly open blow-out bar 2 that water reaching the water outlet opening 17 flows into the water drainage channel 16.
  • the water outlet opening 17 is also approximately at the level (with respect to the longitudinal axis L) of the lowest point of the upwardly opening Ausblasschute 2 a arranged or at or in the vicinity of a most terminal position (with respect to the longitudinal axis L).
  • a deep drainage can be made possible and, in addition, it can be prevented that water exiting from the water outlet opening 17 continues to run down on the outlet baffle 2a.
  • the water drainage channel 16 can be produced in a particularly simple manner by introducing a groove 20 in the outside 13 of the main body 21 in a half-finished state of the outlet bar 2, and this is subsequently capped by means of the end plate 22.
  • Fig.1 shows the partially cut in the region of the groove 20 end plate 22.
  • the groove 20 opposite side of the end plate 22 is the contact surface to the other body 21 a.
  • Figure 5 shows in one too Fig.2 analogous representation of a section of a further Ausblasschute 23 in an arrangement in which the Ausblasschute 23 opens downward.
  • the Ausblasschute 23 is similar to the Ausblasschute 2 constructed, but now the water drainage channel 16 with its water outlet opening 24 is not in the bottom of the body 25, but in the end plate 26, which may also be referred to as an intermediate plate.
  • the main body 25 may, for example, have been produced in one piece by means of an aluminum die-casting process.
  • the end plate 26 may have a different material.
  • the Ausblasschute 23 has here the main body 25 and the end plate 26.
  • the end plate may have the at least one water drainage channel 17 for both main body 25.
  • the end plate then represents a common intermediate plate for both Ausblasschuten 23 then.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Claims (12)

  1. Goulotte (2, 2a; 23) d'expulsion pour un parafoudre (1), dans laquelle
    - la goulotte (2, 2a; 23) d'expulsion a au moins un élément (15) de fixation, qui est prévu et conçu pour la fixation dos à dos d'une deuxième goulotte (2, 2a; 23) d'expulsion,
    - la goulotte (2, 2a; 23) d'expulsion a au moins un canal (3) d'expulsion ayant au moins une ouverture (7) d'expulsion, caractérisée en ce que
    - le au moins un canal (3) d'expulsion communique fluidiquement respectivement avec au moins un canal (16) d'évacuation d'eau,
    - le au moins un canal (16) d'évacuation d'eau a au moins une ouverture (17 ; 24) de sortie d'eau débouchant vers l'extérieur et
    - la au moins une ouverture (17 ; 24) de sortie d'eau est disposée dissymétriquement par rapport à la fixation dos à dos.
  2. Goulotte (2, 2a; 23) d'expulsion suivant la revendication 1, dans laquelle la goulotte (2, 2a ; 23) d'expulsion a un premier côté (12) et un deuxième côté (13), le deuxième côté (13) ayant le au moins un élément (15) de fixation et le premier côté (12) étant prévu pour la fixation au parafoudre (1 ).
  3. Goulotte (2, 2a) d'expulsion suivant l'une des revendications précédentes, dans laquelle le canal (3) d'expulsion s'épanouit en une zone (4) d'extrémité en forme de coupe, dont le bord (6) libre délimite l'ouverture (7) d'expulsion et le canal (16) d'évacuation d'eau s'étend dans un fond (9) de la zone (4) d'extrémité en forme de coupe.
  4. Goulotte (23) d'expulsion suivant l'une des revendications 1 ou 2, dans laquelle le canal (16) d'évacuation d'eau s'étend dans une plaque (26), la goulotte (23) d'expulsion pouvant être fixée par la plaque (26) à une autre goulotte (23) d'expulsion suivant une fixation dos à dos.
  5. Goulotte (2, 2a) d'expulsion suivant l'une des revendications précédentes, dans laquelle le canal (16) d'évacuation d'eau s'étend sensiblement horizontalement, au moins dans la partie se raccordant à l'ouverture (17 ; 24) de sortie d'eau.
  6. Goulotte (2, 2a) d'expulsion suivant l'une des revendications précédentes, dans laquelle le canal (16) d'évacuation d'eau a une paroi (18) qui est tournée vers le canal (3) d'expulsion et qui est inclinée vers l'ouverture (7) d'expulsion dans la direction de l'ouverture (17 ; 24) de sortie d'eau.
  7. Goulotte (2, 2a) d'expulsion suivant l'une des revendications précédentes, dans laquelle le canal (16) d'évacuation d'eau est incliné vers l'ouverture (7) d'expulsion dans la direction de l'ouverture (17 ; 24) de sortie d'eau.
  8. Goulotte (2, 2a) d'expulsion suivant l'une des revendications précédentes, dans laquelle l'ouverture (17; 24) de sortie d'eau est disposée au moins au niveau ou à proximité d'un point le plus bas de la goulotte (2, 2a; 23) d'expulsion.
  9. Parafoudre (1), ayant au moins une goulotte (2, 2a; 23) d'expulsion suivant l'une des revendications précédentes.
  10. Parafoudre (1) suivant la revendication 9, dans lequel la au moins une ouverture (7) d'expulsion est dirigée dans une direction le long du parafoudre (1 ).
  11. Jeu composé d'au moins deux parafoudres (1) montés en série suivant l'une des revendications 9 ou 10, dans lequel au moins deux parafoudres (1) voisins sont reliés entre eux suivant une fixation dos à dos, par respectivement l'une de leurs goulottes (2, 2a ; 23) d'expulsion.
  12. Jeu suivant la revendication 11, dans lequel deux goulottes (23) d'expulsion voisines sont reliées entre elles par une plaque (26) commune, au moins un canal (16) d'évacuation d'eau de chacune des deux goulottes (23) d'expulsion s'étendant dans la plaque (26) commune.
EP12714600.9A 2011-04-19 2012-03-22 Dispositif formant goulotte d'expulsion pour un limiteur de surtension, limiteur de surtension et jeu de limiteurs de surtensions montés en série Not-in-force EP2641306B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110007674 DE102011007674A1 (de) 2011-04-19 2011-04-19 Ausblasschute für einen Überspannungsableiter, Überspannungsableiter sowie Satz aus in Reihe angeordneten Überspannungsableitern
PCT/EP2012/055087 WO2012143200A1 (fr) 2011-04-19 2012-03-22 Dispositif formant goulotte d'expulsion pour un limiteur de surtension, limiteur de surtension et jeu de limiteurs de surtensions montés en série

Publications (2)

Publication Number Publication Date
EP2641306A1 EP2641306A1 (fr) 2013-09-25
EP2641306B1 true EP2641306B1 (fr) 2014-10-29

Family

ID=45974262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12714600.9A Not-in-force EP2641306B1 (fr) 2011-04-19 2012-03-22 Dispositif formant goulotte d'expulsion pour un limiteur de surtension, limiteur de surtension et jeu de limiteurs de surtensions montés en série

Country Status (4)

Country Link
EP (1) EP2641306B1 (fr)
CN (1) CN103477516A (fr)
DE (1) DE102011007674A1 (fr)
WO (1) WO2012143200A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012207928A1 (de) * 2012-05-11 2013-11-14 Siemens Aktiengesellschaft Überspannungsableiter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588578A (en) * 1970-05-22 1971-06-28 Mc Graw Edison Co Lightning arrester venting means
CH540579A (de) * 1972-12-01 1973-08-15 Sprecher & Schuh Ag Uberspannungsableiter
FR2317914A2 (fr) * 1975-07-17 1977-02-11 Screen Nouveaux produits doues notamment de proprietes therapeutiques, leurs procedes de preparation, et medicaments a base de ces produits
US4298900A (en) * 1980-01-02 1981-11-03 Avdeenko Boris K Overvoltage protective device
DE3032852A1 (de) * 1980-04-29 1981-11-05 BBC AG Brown, Boveri & Cie., 5401 Baden, Aargau Ueberspannungsableiter
FR2632114B1 (fr) * 1988-05-24 1993-12-31 Ferraz Dispositif parafoudre pour la protection des lignes electriques

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Publication number Publication date
WO2012143200A1 (fr) 2012-10-26
DE102011007674A1 (de) 2012-10-25
CN103477516A (zh) 2013-12-25
EP2641306A1 (fr) 2013-09-25

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