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EP1063667A1 - Medium voltage fuse with a visual indication of the opened condition in a fuse - Google Patents

Medium voltage fuse with a visual indication of the opened condition in a fuse Download PDF

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Publication number
EP1063667A1
EP1063667A1 EP00401810A EP00401810A EP1063667A1 EP 1063667 A1 EP1063667 A1 EP 1063667A1 EP 00401810 A EP00401810 A EP 00401810A EP 00401810 A EP00401810 A EP 00401810A EP 1063667 A1 EP1063667 A1 EP 1063667A1
Authority
EP
European Patent Office
Prior art keywords
fuse
tubular extension
striker
foot
circular base
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.)
Withdrawn
Application number
EP00401810A
Other languages
German (de)
French (fr)
Inventor
Pierre Leroy
Stéphane Melquiond
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
Alstom 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 Alstom SA filed Critical Alstom SA
Publication of EP1063667A1 publication Critical patent/EP1063667A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
    • H01H85/303—Movable indicating elements

Definitions

  • the invention relates to a fuse for a medium voltage installation, comprising a tightly closed cylindrical fuse body extending in an axial direction, a striker mounted inside the body watertight fuse and arranged to move in said axial direction when activated so as to act on a part used to signal a blown fuse.
  • striker fuses are mainly used in armored substations and are subject to standardization, in particular as regards concerns the mechanical characteristics of the striker. So far in application to armored substations, the fuse striker is intended to act on a operating mechanism of a breaking device such as a disconnector. When actuated, the striker tears a tightly closing disc the fuse body to act on the operating mechanism which can be a swing arm for example. The stroke of the striker depends in particular on the kinematics of the operating mechanism on which it acts.
  • Figure 1 shows in longitudinal section a fuse according to the invention with the part used to visually indicate that the fuse has blown.
  • Figure 2 shows in longitudinal section the part used to signal visually cutting the fuse when it is almost expelled from the tubular extension at the end of the fuse.
  • Figure 3 shows in more detail in a plan view of the circular base frangible part used to visually signal the blowing of the fuse.
  • the medium voltage fuse 1 shown partially in section longitudinal has a cylindrical fuse body 2 sealed at its two ends which extends in an axial direction A and in which is mounted a piston striker 3.
  • the striker 3 conventional in itself, is arranged to move along said direction A when it is activated, i.e. when the fuse is cut.
  • the displacement of striker 3 in direction A is obtained by the relaxation of a spring 4 kept compressed by fusible wires 5.
  • the fuse body 2 is therefore closed in a sealed manner to one of its two ends by a metal cap 6 of electrical connection having a central recess 7 which is crossed by the striker 3 when the latter is operated.
  • the central recess 7 is normally sealed off by a plastic film (not shown) which is torn by the striker when it is activated.
  • a tubular extension 8 coaxial with the body fuse 2 is fitted on the cap 6 and a piece 9 of visual signaling of the cut-out of the fuse is mounted coaxially inside this tubular extension 8.
  • This part 9 consists of an ogival head 10 connected to a circular base 11 by a central foot 12 around which is wound a ribbon 13.
  • This part 9 is separated from the striker 3 by a disc flexible seal 14 mounted in abutment on the crown formed by the face front of the cap 6 provided with its central recess 7 and pinched between the cap 6 and the circular base 11.
  • the circular base 11 is locked in a internal cylindrical bore of the tubular extension 8 bearing against the crown defined by the front face of the cap 6 which is fixed in the body fuse.
  • the circular base 11 has areas of small section 11A, 11B, 11C, 11D (radial connecting branches of the peripheral crown of the circular base 11 with the central leg 12) which break ( Figure 3b) under the action of the striker to release the foot 12 of the room.
  • the diameter of foot 12 is expected to be slightly larger than the diameter of the recess 7 and is coaxial with it so that the part 9 does not cannot be inserted into fuse body 2.
  • the base of the foot 12 connected to the circular base 11 is supported on the cap 6 through the flexible disc 14 when the striker is not actuated.
  • the ogival head 10 of the part 9 has a convex surface oriented on the side of the opening of the tubular extension 8 and has a diameter sufficient to close off this opening which prevents it from being grasped from outside the tubular extension 8.
  • the ribbon 13 has one end fixed in a slot 15 provided in the part peripheral of the circular base 11 which remains integral with the fuse body when the striker is actuated and another end fixed in a slot longitudinal of foot 12.
  • the rear face of the ogival head 10a also a convex surface oriented on the side of the fuse body 2 which can prevent stagnation of water which could infiltrate into the extension tubular 8 when the fuse 1 is arranged vertically (the part 9 being arranged at the bottom).
  • the convexity of the ogival head 10 is oriented to the side of the opening of the tubular extension so that it is practically impossible to extract the visual signaling piece from the extension tubular.
  • the fuse fitted with this visual signaling can be handled without risk of damage to part 9 used for visually indicate that the fuse has blown.
  • the base circular of this piece 9 is in abutment against a crown 6 or 7 fixed in the fuse body, it is also not possible to push this part into the fuse body, which helps maintain the integrity of the fuse striker during these handling phases.
  • the tubular extension can be an insert fitted on the cap 6 end of the fuse body allowing easy recycling of fuses existing medium voltage.
  • the part 9 can be produced by molding a plastic material.
  • the tubular extension 8 is shown here as an insert coming from fit onto the end cap of fuse 1. It is however understood that the invention also extends to an embodiment where the fuse body 2 and the tubular extension 8 form a single piece.

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  • Fuses (AREA)

Abstract

The fuse has a cylindrical body and a visible indication of fuse rupture. The fuse has a sealed cylindrical body (2) extending along an axial direction (A), with a percussion device (4) mounted inside the sealed body (2). This is arranged to be displaced along the axial direction (A) when it is actuated, to act on a part (9) used to signal fuse rupture. The visual signalization piece has a rounded head (10) connected to a circular base (11) by a foot (12) around which is rolled a ribbon (13). The piece (9) is mounted co-axially in an extension section at the end of the fuse body (2) and is separated from the percussion device (4) by a flexible sealing disk (14). The disk closes an end of the fuse and is mounted on a co-axial crown (6,7) fixed in the fuse body. The circular base (11) is mounted so as to press against the fixed crown (6,7), and the rounded head (10) has a diameter sufficient to close the tubular extension part. The base of the part (9) has breakable ribs (11), which break when the percussion device is activated, so as to expel the head (10) from the tubular body (8). The ribbon (13) has an end fixed to the fusible body, and an end fixed to the foot of the signalization piece, so that when it is expelled it hangs from body to visually signal fuse rupture.

Description

L'invention porte sur un fusible pour une installation de moyenne tension, comprenant un corps de fusible cylindrique fermé de manière étanche s'étendant suivant une direction axiale, un percuteur monté à l'intérieur du corps de fusible étanche et agencé pour se déplacer suivant ladite direction axiale lorsqu'il est actionné de façon à agir sur une pièce servant à signaler une coupure du fusible.The invention relates to a fuse for a medium voltage installation, comprising a tightly closed cylindrical fuse body extending in an axial direction, a striker mounted inside the body watertight fuse and arranged to move in said axial direction when activated so as to act on a part used to signal a blown fuse.

Les fusibles à percuteur de l'état de la technique sont principalement employés dans des postes blindés et font l'objet d'une normalisation notamment en ce qui concerne les caractéristiques mécaniques du percuteur. Jusqu'à présent, dans l'application aux postes blindés, le percuteur du fusible est destiné à agir sur un mécanisme de manoeuvre d'un organe de coupure comme un sectionneur. Lorsqu'il est actionné, le percuteur déchire un disque fermant de façon étanche le corps de fusible pour agir sur le mécanisme de manoeuvre qui peut être un bras oscillant par exemple. La course du percuteur est fonction notamment de la cinématique du mécanisme de manoeuvre sur lequel il agit.State of the art striker fuses are mainly used in armored substations and are subject to standardization, in particular as regards concerns the mechanical characteristics of the striker. So far in application to armored substations, the fuse striker is intended to act on a operating mechanism of a breaking device such as a disconnector. When actuated, the striker tears a tightly closing disc the fuse body to act on the operating mechanism which can be a swing arm for example. The stroke of the striker depends in particular on the kinematics of the operating mechanism on which it acts.

L'invention permet quant à elle d'obtenir un fusible dont le percuteur agit sur une pièce servant à signaler de façon visuelle la coupure du fusible, notamment depuis le haut d'un poteau support de ligne ou d'appareillages électriques moyenne tension.The invention makes it possible to obtain a fuse whose striker acts on a part used to visually indicate that the fuse has blown, in particular from the top of a line support pole or electrical equipment medium voltage.

Un exemple de réalisation d'un fusible selon l'invention est décrit ci-après en relation avec les dessins.An exemplary embodiment of a fuse according to the invention is described below in relationship with the drawings.

La figure 1 montre en coupe longitudinale un fusible selon l'invention avec la pièce servant à signaler visuellement la coupure du fusible.Figure 1 shows in longitudinal section a fuse according to the invention with the part used to visually indicate that the fuse has blown.

La figure 2 montre en coupe longitudinale la pièce servant à signaler visuellement la coupure du fusible lorsqu'elle est presque expulsée de la prolongation tubulaire à l'extrémité du fusible.Figure 2 shows in longitudinal section the part used to signal visually cutting the fuse when it is almost expelled from the tubular extension at the end of the fuse.

La figure 3 montre plus en détail selon une vue en plan de la base circulaire frangible de la pièce servant à signaler visuellement la coupure du fusible.Figure 3 shows in more detail in a plan view of the circular base frangible part used to visually signal the blowing of the fuse.

Figure 1, le fusible moyenne tension 1 montré partiellement en coupe longitudinale comporte un corps cylindrique de fusible 2 fermé de façon étanche à ses deux extrémités qui s'étend suivant une direction axiale A et dans lequel est monté un percuteur à piston 3.Figure 1, the medium voltage fuse 1 shown partially in section longitudinal has a cylindrical fuse body 2 sealed at its two ends which extends in an axial direction A and in which is mounted a piston striker 3.

Le percuteur 3, classique en soi, est agencé pour se déplacer suivant ladite direction A lorsqu'il est actionné, c'est-à-dire quand le fusible est coupé. Le déplacement du percuteur 3 selon la direction A est obtenu par la détente d'un ressort 4 maintenu comprimé par des fils fusibles 5. The striker 3, conventional in itself, is arranged to move along said direction A when it is activated, i.e. when the fuse is cut. The displacement of striker 3 in direction A is obtained by the relaxation of a spring 4 kept compressed by fusible wires 5.

Le corps de fusible 2 est donc fermé de façon étanche à une de ses deux extrémités par une calotte métallique 6 de raccordement électrique présentant un évidemment central 7 qui est traversé par le percuteur 3 lorsque celui-ci est actionné. L'évidement central 7 est normalement obturé de façon étanche par un film en matière plastique (non représenté) qui est déchiré par le percuteur lorsque celui-ci est actionné.The fuse body 2 is therefore closed in a sealed manner to one of its two ends by a metal cap 6 of electrical connection having a central recess 7 which is crossed by the striker 3 when the latter is operated. The central recess 7 is normally sealed off by a plastic film (not shown) which is torn by the striker when it is activated.

Comme représenté sur la figure 1, un prolongement tubulaire 8, coaxial au corps de fusible 2, est emboíté sur la calotte 6 et une pièce 9 de signalisation visuelle de la coupure du fusible est montée de façon coaxiale à l'intérieur de ce prolongement tubulaire 8. Cette pièce 9 est constituée d'une tête ogivale 10 raccordée à une base circulaire 11 par un pied central 12 autour duquel est enroulé un ruban 13. Cette pièce 9 est séparée du percuteur 3 par un disque souple d'étanchéité 14 monté en appui sur la couronne formée par la face frontale de la calotte 6 munie de son évidemment central 7 et pincé entre la calotte 6 et la base circulaire 11. La base circulaire 11 est bloquée dans un alésage cylindrique intérieur du prolongement tubulaire 8 venant en appui contre la couronne définie par la face frontale de la calotte 6 qui est fixe dans le corps de fusible.As shown in FIG. 1, a tubular extension 8, coaxial with the body fuse 2, is fitted on the cap 6 and a piece 9 of visual signaling of the cut-out of the fuse is mounted coaxially inside this tubular extension 8. This part 9 consists of an ogival head 10 connected to a circular base 11 by a central foot 12 around which is wound a ribbon 13. This part 9 is separated from the striker 3 by a disc flexible seal 14 mounted in abutment on the crown formed by the face front of the cap 6 provided with its central recess 7 and pinched between the cap 6 and the circular base 11. The circular base 11 is locked in a internal cylindrical bore of the tubular extension 8 bearing against the crown defined by the front face of the cap 6 which is fixed in the body fuse.

Comme représenté sur les figures 3a et 3b, la base circulaire 11 comporté des zones de faible section 11A,11B,11C,11D (branches radiales de raccordement de la couronne périphérique de la base circulaire 11 avec le pied central 12) qui se brisent (figure 3b) sous l'action du percuteur afin de libérer le pied 12 de la pièce. A noter que le diamètre du pied 12 est prévu légèrement plus grand que le diamètre de l'évidement 7 et est coaxial à celui-ci de sorte que la pièce 9 ne peut pas être enfoncée dans le corps de fusible 2. Comme visible sur la figure 1, la base du pied 12 raccordée à la base circulaire 11 est en appui sur la calotte 6 à travers le disque souple 14 quand le percuteur n'est pas actionné.As shown in Figures 3a and 3b, the circular base 11 has areas of small section 11A, 11B, 11C, 11D (radial connecting branches of the peripheral crown of the circular base 11 with the central leg 12) which break (Figure 3b) under the action of the striker to release the foot 12 of the room. Note that the diameter of foot 12 is expected to be slightly larger than the diameter of the recess 7 and is coaxial with it so that the part 9 does not cannot be inserted into fuse body 2. As shown in figure 1, the base of the foot 12 connected to the circular base 11 is supported on the cap 6 through the flexible disc 14 when the striker is not actuated.

La tête ogivale 10 de la pièce 9 a une surface convexe orientée du côté de l'ouverture du prolongement tubulaire 8 et a un diamètre suffisant pour obturer cette ouverture ce qui empêche sa préhension depuis l'extérieur du prolongement tubulaire 8.The ogival head 10 of the part 9 has a convex surface oriented on the side of the opening of the tubular extension 8 and has a diameter sufficient to close off this opening which prevents it from being grasped from outside the tubular extension 8.

Le ruban 13 a une extrémité fixée dans une fente 15 prévu dans la partie périphérique de la base circulaire 11 qui reste solidaire du corps de fusible lorsque le percuteur est actionné et une autre extrémité fixée dans une fente longitudinale du pied 12.The ribbon 13 has one end fixed in a slot 15 provided in the part peripheral of the circular base 11 which remains integral with the fuse body when the striker is actuated and another end fixed in a slot longitudinal of foot 12.

Quand le percuteur 3 est actionné, comme représenté sur la figure 2, en se déplaçant suivant la direction A, il traverse l'évidement 7 de la calotte 6, déforme le disque souple 14 et vient frapper la partie centrale de la base circulaire 11 solidaire du pied 12. Sous l'effet du choc, les zones de faible section 11A-11D de la base circulaire 11 se brisent et le pied 12 avec la tête ogivale 10 de la pièce 9 sont expulsés hors de la prolongation tubulaire 8 et restent suspendus, par le ruban 13, au corps de fusible 2 pour signaler visuellement la coupure du fusible.When the striker 3 is actuated, as shown in FIG. 2, while moving in direction A, it crosses the recess 7 of the cap 6, deforms the flexible disc 14 and strikes the central part of the circular base 11 integral with the foot 12. Under the effect of the shock, the zones of small section 11A-11D of the circular base 11 break and the foot 12 with the ogival head 10 of the part 9 are expelled from the tubular extension 8 and remain suspended, by the ribbon 13, to the fuse body 2 to visually signal the cut-out of the fuse.

Comme représenté sur les figures 1 et 2, la face arrière de la tête ogivale 10 a également une surface convexe orienté du côté du corps de fusible 2 ce qui peut empêcher la stagnation de l'eau pouvant s'infiltrer dans le prolongement tubulaire 8 quand le fusible 1 est disposé verticalement (la pièce 9 étant disposée en bas).As shown in Figures 1 and 2, the rear face of the ogival head 10a also a convex surface oriented on the side of the fuse body 2 which can prevent stagnation of water which could infiltrate into the extension tubular 8 when the fuse 1 is arranged vertically (the part 9 being arranged at the bottom).

Avec un tel agencement, la convexité de la tête ogivale 10 est orientée du côté de l'ouverture de la prolongation tubulaire de sorte qu'il est pratiquement impossible d'extraire la pièce de signalisation visuelle de la prolongation tubulaire. Il en résulte que le fusible équipé de cette signalisation visuelle peut être manutentionné sans risque d'endommagement de la pièce 9 servant à signaler visuellement la coupure du fusible. En outre, du fait que la base circulaire de cette pièce 9 est en appui contre une couronne 6 ou 7 fixe dans le corps de fusible, il n'est pas non plus possible d'enfoncer cette pièce dans le corps de fusible, ce qui contribue à maintenir l'intégrité du percuteur du fusible pendant ces phases de manutention. En prévoyant un disque souple 14 d'étanchéité entre le percuteur 4 et la pièce de signalisation visuelle, on préserve l'étanchéité du corps de fusible même après l'actionnement du percuteur ce qui fait que l'intervention sur le fusible, après sa coupure, peut être effectuée dans un certain délai sans risque d'amorçage d'un courant électrique au niveau du fusible.With such an arrangement, the convexity of the ogival head 10 is oriented to the side of the opening of the tubular extension so that it is practically impossible to extract the visual signaling piece from the extension tubular. As a result, the fuse fitted with this visual signaling can be handled without risk of damage to part 9 used for visually indicate that the fuse has blown. Furthermore, because the base circular of this piece 9 is in abutment against a crown 6 or 7 fixed in the fuse body, it is also not possible to push this part into the fuse body, which helps maintain the integrity of the fuse striker during these handling phases. By providing a flexible disk 14 between the striker 4 and the visual signaling part, preserves the tightness of the fuse body even after the actuation of the striker which means that intervention on the fuse, after it has been cut, can be carried out within a certain time without risk of initiation of an electric current at the fuse.

La prolongation tubulaire peut être une pièce rapportée emboítée sur la calotte 6 d'extrémité du corps de fusible ce qui permet un recyclage aisé des fusibles moyenne tension existants.The tubular extension can be an insert fitted on the cap 6 end of the fuse body allowing easy recycling of fuses existing medium voltage.

La pièce 9 peut être réalisée par moulage d'une matière plastique.The part 9 can be produced by molding a plastic material.

Le prolongement tubulaire 8 est montré ici comme une pièce rapportée venant s'emboíter sur la calotte d'extrémité du fusible 1. Il est toutefois entendu que l'invention s'étend également à une réalisation où le corps de fusible 2 et le prolongement tubulaire 8 forment une seule pièce.The tubular extension 8 is shown here as an insert coming from fit onto the end cap of fuse 1. It is however understood that the invention also extends to an embodiment where the fuse body 2 and the tubular extension 8 form a single piece.

Claims (1)

Un fusible pour une installation de moyenne tension, comprenant un corps de fusible cylindrique (2) fermé de manière étanche s'étendant suivant une direction axiale (A), un percuteur (4) monté à l'intérieur du corps de fusible étanche et agencé pour se déplacer suivant ladite direction axiale lorsqu'il est actionné de façon à agir sur une pièce (9) servant à signaler une coupure du fusible, caractérisé en ce que ladite pièce est constituée d'une tête ogivale (10) raccordée à une base circulaire (11) par un pied (12) autour duquel est enroulé un ruban (13), en ce que cette pièce est montée de façon coaxiale dans une prolongation tubulaire (8) à l'extrémité du corps de fusible en étant séparée du percuteur par un disque souple d'étanchéité (14) fermant une extrémité du fusible et monté sur une couronne coaxiale (6,7) fixe dans le corps de fusible, en ce que la base circulaire de ladite pièce est montée bloquée dans la prolongation tubulaire en appui contre la couronne fixe, en ce que la tête ogivale de la dite pièce a un diamètre suffisant pour obturer la prolongation tubulaire, en ce que la base circulaire de ladite pièce comporte des zones de faible section (11A-11D) afin de pouvoir se briser sous l'action du percuteur pour permettre l'expulsion de la tête ogivale avec le pied hors de la prolongation tubulaire, et en ce que le ruban a une extrémité fixée au corps de fusible et l'autre extrémité fixée au pied de ladite pièce de telle sorte que la tête ogivale expulsée hors de la prolongation tubulaire reste suspendue au corps de fusible pour signaler visuellement la coupure du fusible.A fuse for a medium voltage installation, comprising a body of cylindrical fuse (2) tightly closed extending in one direction axial (A), a striker (4) mounted inside the sealed fuse body and arranged to move in said axial direction when actuated so as to act on a part (9) used to signal a blown fuse, characterized in that said part consists of an ogival head (10) connected to a circular base (11) by a foot (12) around which is wound a ribbon (13), in that this part is mounted coaxially in a tubular extension (8) at the end of the fuse body being separated from the striker by a flexible sealing disc (14) closing one end of the fuse and mounted on a coaxial ring (6,7) fixed in the fuse body, in that the circular base of said piece is mounted locked in the tubular extension resting against the fixed crown, in that the ogival head of said part has a diameter sufficient to close the tubular extension, in that the circular base of said part includes zones of small section (11A-11D) in order to be able to break under the action of the striker to allow the expulsion of the ogival head with the foot out of the tubular extension, and what the ribbon has one end attached to the fuse body and the other end fixed to the foot of said piece so that the ogival head expelled out of the tubular extension remains suspended from the fuse body to signal visually cutting the fuse.
EP00401810A 1999-06-25 2000-06-23 Medium voltage fuse with a visual indication of the opened condition in a fuse Withdrawn EP1063667A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9908146 1999-06-25
FR9908146A FR2795551B1 (en) 1999-06-25 1999-06-25 MEDIUM VOLTAGE FUSE WITH VISUAL SIGNALING OF FUSE BREAKAGE

Publications (1)

Publication Number Publication Date
EP1063667A1 true EP1063667A1 (en) 2000-12-27

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EP00401810A Withdrawn EP1063667A1 (en) 1999-06-25 2000-06-23 Medium voltage fuse with a visual indication of the opened condition in a fuse

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EP (1) EP1063667A1 (en)
FR (1) FR2795551B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011121216A1 (en) 2010-03-29 2011-10-06 Mersen France Sb Sas Fuse and sectioning switch comprising such a fuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1782089A (en) * 1925-06-13 1930-11-18 Harry W Baumer Protective device for electric circuits
GB1166848A (en) * 1966-10-14 1969-10-08 English Electric Co Ltd Improvements in Fuselinks
DE2920153A1 (en) * 1979-05-18 1980-11-27 Krone Gmbh Medium voltage switching unit using insulating gas, or liq. - has fuse support housing with side outlets carrying caps forced off by gas pressure
EP0430604A2 (en) * 1989-11-30 1991-06-05 Cooper Industries, Inc. Flagged blown fuse indicator
FR2655477A1 (en) * 1989-12-06 1991-06-07 Ferraz Protection device with visual fault indicator for overhead electrical networks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1782089A (en) * 1925-06-13 1930-11-18 Harry W Baumer Protective device for electric circuits
GB1166848A (en) * 1966-10-14 1969-10-08 English Electric Co Ltd Improvements in Fuselinks
DE2920153A1 (en) * 1979-05-18 1980-11-27 Krone Gmbh Medium voltage switching unit using insulating gas, or liq. - has fuse support housing with side outlets carrying caps forced off by gas pressure
EP0430604A2 (en) * 1989-11-30 1991-06-05 Cooper Industries, Inc. Flagged blown fuse indicator
FR2655477A1 (en) * 1989-12-06 1991-06-07 Ferraz Protection device with visual fault indicator for overhead electrical networks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011121216A1 (en) 2010-03-29 2011-10-06 Mersen France Sb Sas Fuse and sectioning switch comprising such a fuse

Also Published As

Publication number Publication date
FR2795551B1 (en) 2001-08-03
FR2795551A1 (en) 2000-12-29

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