ES2557955B1 - Eject fuse circuit breaker - Google Patents
Eject fuse circuit breaker Download PDFInfo
- Publication number
- ES2557955B1 ES2557955B1 ES201431140A ES201431140A ES2557955B1 ES 2557955 B1 ES2557955 B1 ES 2557955B1 ES 201431140 A ES201431140 A ES 201431140A ES 201431140 A ES201431140 A ES 201431140A ES 2557955 B1 ES2557955 B1 ES 2557955B1
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- Spain
- Prior art keywords
- circuit breaker
- clamp
- bar
- support arm
- center
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- 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.)
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- Fuses (AREA)
Abstract
Cortacircuitos fusible de expulsión que comprende una base la cual a su vez comprende una barra de fibra de vidrio y un brazo soporte metálico fijado a la misma mediante una abrazadera, en el que la barra y la abrazadera son de fibra de vidrio libre de boro, la fijación de la abrazadera a la barra es por pegado con resina mediante enrollado de filamento.Eject fuse circuit breaker comprising a base which in turn comprises a fiberglass bar and a metal support arm fixed thereto by means of a clamp, in which the bar and the clamp are made of boron-free glass fiber, the fixing of the clamp to the bar is by bonding with resin by means of filament winding.
Description
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CORTACIRCUITOS FUSIBLE DE EXPULSION DESCRIPCIONEXPULSION FUSE SHORT CIRCUITS DESCRIPTION
OBJETO DE LA INVENCIONOBJECT OF THE INVENTION
La presente invencion se engloba en el campo de los cortacircuitos fusibles de expulsion.The present invention is encompassed in the field of fuse ejector circuit breakers.
Dicha invencion es un cortacircuitos fusible de expulsion que comprende una base la cual a su vez comprende una barra de fibra de vidrio y un brazo soporte metalico fijado a la misma mediante una abrazadera de manera que el cortacircuitos cumple las normas IEC 602828-2 y IEC 61109.Said invention is a fuse ejector circuit breaker comprising a base which in turn comprises a fiberglass bar and a metal support arm fixed thereto by means of a clamp so that the circuit breaker complies with IEC 602828-2 and IEC standards 61109.
ANTECEDENTES DE LA INVENCIONBACKGROUND OF THE INVENTION
Los cortacircuitos de expulsion son utilizados por las compares electricas distribuidoras en las instalaciones de media tension, y se colocan habitualmente sobre torretas de distribucion de media tension cuando se pretende derivar una lmea para dar servicio a un centro de transformacion o a cualquier otro elemento receptor.The ejection circuit breakers are used by the electric comparator distributors in medium voltage installations, and are usually placed on medium voltage distribution turrets when it is intended to derive a line to service a transformer center or any other receiving element.
Los cortacircuitos son aparatos unipolares, colocandose, por lo tanto, uno por cada fase. La base del cortacircuitos de expulsion es el elemento aislador sobre el que se coloca el elemento portafusible que es el encargado de proteger la lmea de alimentacion contra cortocircuitos.The circuit breakers are unipolar devices, therefore placing one for each phase. The base of the ejection circuit breaker is the insulating element on which the fuse holder is placed, which is responsible for protecting the supply line against short circuits.
Hasta hace unos anos las bases de los cortacircuitos de expulsion eran principalmente ceramicas dadas las buenas propiedades de estos materiales para conseguir el aislamiento adecuado. Sobre el centro de dichas bases se incorporaba un brazo soporte que permite la sujecion de la base del cortacircuitos a la estructura de soporte o a la torreta de distribucion. Dicho brazo debe ser metalico pues debe estar conectado a tierra.Until a few years ago the bases of the ejection circuit breakers were mainly ceramic given the good properties of these materials to achieve adequate insulation. A support arm was incorporated over the center of said bases, which allows the attachment of the circuit breaker base to the support structure or to the distribution turret. Said arm must be metallic because it must be grounded.
La utilizacion de materiales ceramicos presentaba diversos inconvenientes: peso, fragilidad, dificultades de montaje y transporte, y alto coste.The use of ceramic materials presented several disadvantages: weight, fragility, difficulties of assembly and transport, and high cost.
Por todo lo anteriormente expuesto, diversos fabricantes avanzaron hacia un sistema de aislamiento no ceramico, sino polimerico, con el fin de superar las anteriores dificultades expuestas.For all the above, various manufacturers advanced towards a non-ceramic, but polymeric, insulation system, in order to overcome the above-mentioned difficulties.
En general, durante la ultima decada, los equipos instalados en redes electricas de distribucion han evolucionado hacia el uso generalizado de aislamientos polimericos, ganando asf en maniobrabilidad, ligereza, y facilidad de mantenimiento con respecto a los sistemas de aislamiento ceramico.In general, during the last decade, the equipment installed in electrical distribution networks has evolved towards the widespread use of polymeric insulation, thus gaining maneuverability, lightness, and ease of maintenance with respect to ceramic insulation systems.
Pero, por diversas razones, todos los fabricantes en el mercado incluyen una parte metalica “escondida” debajo del polfmero de la base que constituye un punto conectado electricamente a tierra, como en la patente WO02/15212. Este estilo constructivo induce una distorsion del campo electromagnetico asociado con la aplicacion de impulsos de tension, de tal modo que dichos impulsos no pueden contornear por la parte de fuera del aislamiento (como deben hacer de acuerdo a la norma), sino que son forzados a penetrar entre el aislamiento polimerico y la barra de fibra de vidrio sobre el que dicho aislamiento va adherido. Este fenomeno perfora el aislamiento de la base y, en ultima instancia, hace que falle en los ensayos previstos en las normas internacionales de obligado cumplimiento IEC 602828-2 y IEC 61109.But, for various reasons, all manufacturers on the market include a "hidden" metal part under the base polymer that constitutes a point electrically grounded, as in WO02 / 15212. This constructive style induces a distortion of the electromagnetic field associated with the application of voltage pulses, such that said pulses cannot contour outside the insulation (as they should do according to the standard), but are forced to penetrate between the polymeric insulation and the fiberglass bar on which said insulation is bonded. This phenomenon punctures the insulation of the base and, ultimately, causes it to fail in the tests provided for in the mandatory international standards IEC 602828-2 and IEC 61109.
Asf pues, se expone la presente invencion de un cortacircuitos que supera las desventajas citadas y cubre la necesidad expuesta de superar las normas internacionales de obligado cumplimiento IEC 602828-2 y IEC 61109.Thus, the present invention of a circuit breaker that overcomes the aforementioned disadvantages and covers the exposed need to overcome the international mandatory standards IEC 602828-2 and IEC 61109 is exposed.
DESCRIPCION DE LA INVENCIONDESCRIPTION OF THE INVENTION
La presente invencion queda establecida y caracterizada en las reivindicaciones independientes, mientras que las reivindicaciones dependientes describen otras caractensticas de la misma.The present invention is established and characterized in the independent claims, while the dependent claims describe other features thereof.
El objeto de la invencion es un cortacircuitos fusible de expulsion que comprende una base la cual a su vez comprende una barra de fibra de vidrio y un brazo soporte metalico fijado a la misma mediante una abrazadera de manera que el cortacircuitos cumple las normas iEc 602828-2 y IEC 61109. El problema tecnico a resolver es configurar un cortacircuitos en disposicion de componentes y materiales para alcanzar el objeto citado.The object of the invention is an ejector fuse circuit breaker comprising a base which in turn comprises a fiberglass bar and a metal support arm fixed thereto by means of a clamp so that the circuit breaker complies with the iEc 602828- standards. 2 and IEC 61109. The technical problem to be solved is to configure a circuit breaker in disposition of components and materials to reach the mentioned object.
A la vista de lo anteriormente enunciado, la presente invencion se refiere a un cortacircuitos fusible de expulsion que comprende una base la cual a su vez comprende una barra de fibra de vidrio y un brazo soporte metalico fijado a la misma mediante una abrazadera.In view of the foregoing, the present invention relates to a fuse ejector circuit breaker comprising a base which in turn comprises a fiberglass rod and a metal support arm fixed thereto by means of a clamp.
Caracteriza al cortacircuitos el que la barra y la abrazadera son de fibra de vidrio libre de boro, que normalmente es de calidad ECR (siglas en ingles para “Electrical and Chemical Resistant”), es decir, calidad que proporciona resistencia electrica y qrnmica.It characterizes the circuit breaker that the bar and clamp are made of boron-free fiberglass, which is normally of ECR quality (electrical acronym for “Electrical and Chemical Resistant”), that is, quality that provides electrical and chemical resistance.
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Tambien caracteriza al cortacircuitos el que la fijacion de la abrazadera a la barra es por pegado con resina y dicho pegado se realiza mediante enrollado de filamento (“Philament Winding” segun su denominacion inglesa), tecnica conocida de fabricacion utilizando filamentos de fibra de vidrio impregnados en resina y envolviendo con ellos la pieza deseada, por ejemplo asf se realizan depositos y carcasas cilmdricas para muchas aplicaciones.The circuit breaker is also characterized in that the fixing of the clamp to the bar is by bonding with resin and said bonding is carried out by means of filament winding ("Philament Winding" according to its English name), a known manufacturing technique using impregnated fiberglass filaments in resin and wrapping the desired part with them, for example, deposits and cylindrical housings are made for many applications.
El cortacircuitos cumple las normas IEC 602828-2 y IEC 61109, tambien denominadas “ensayo de los herrajes y las interfaces”. Es necesario subrayar que este ensayo se realiza a pieza completa, es decir, sobre el cortacircuitos completo y no solo sobre una de las partes que lo componen, como pudiera ser la barra de la base. Asimismo, es destacable que la configuracion descrita permite superar dicho ensayo utilizando herrajes y aislamientos habituales de cortacircuitos, pues la fijacion de la abrazadera contribuye a evitar el contorneo de la corriente entre la base y el brazo soporte evitando el frente de escarpado que se produce en otros cortacircuitos y que, principalmente, hace que no cumplan las normas citadas.The circuit breaker complies with IEC 602828-2 and IEC 61109 standards, also called “hardware and interface testing”. It is necessary to underline that this test is carried out in full, that is, on the complete circuit breaker and not only on one of the parts that compose it, such as the base bar. Likewise, it is noteworthy that the described configuration allows this test to be overcome using usual circuit breaker fittings and insulations, since the fixing of the clamp helps prevent the contouring of the current between the base and the support arm avoiding the steep front that occurs in other circuit breakers and, mainly, does not comply with the aforementioned standards.
Ventajosamente el brazo soporte se fija en el centro de la barra, asf se reparte igualmente a ambos lados de la barra tanto los esfuerzos mecanicos como las tensiones electricas a soportar. En concreto, se comprueba como optima la relacion entre la distancia Y desde el extremo de la barra hasta su centro y la anchura X de la abrazadera desde dicho centro cumple la relacion 0.09Y<X<0.33Y.Advantageously, the support arm is fixed in the center of the bar, so that both the mechanical stresses and the electrical stresses to be supported are equally distributed on both sides of the bar. Specifically, the relationship between the distance Y from the end of the bar to its center and the width X of the clamp from said center is checked as optimal meets the relationship 0.09Y <X <0.33Y.
Opcionalmente, un espesor E de la abrazadera habitualmente utilizado esta entre 7,5 y 23,5 mm.Optionally, a thickness E of the clamp commonly used is between 7.5 and 23.5 mm.
DESCRIPCION DE LAS FIGURASDESCRIPTION OF THE FIGURES
Se complementa la presente memoria descriptiva, con un juego de figuras, ilustrativas del ejemplo preferente, y nunca limitativas de la invencion.The present specification is complemented by a set of figures, illustrative of the preferred example, and never limiting the invention.
La figura 1 representa una vista de perfil del cortacircuitos de la invencion.Figure 1 represents a profile view of the circuit breaker of the invention.
La figura 2 representa una vista de perfil de la base del cortacircuitos.Figure 2 represents a profile view of the circuit breaker base.
EXPOSICION DETALLADA DE LA INVENCIONDETAILED EXHIBITION OF THE INVENTION
A continuacion se expone una realizacion de la invencion con apoyo en las figuras.Next, an embodiment of the invention is set forth with support in the figures.
En la figura 1 se muestra un cortacircuitos fusible de expulsion con los componentes habituales como son una base (1) sujeta por unos herrajes o mordazas (3) y envuelta por un aislante polimerico (2).Figure 1 shows a fuse ejector circuit breaker with the usual components such as a base (1) held by hardware or jaws (3) and wrapped by a polymeric insulator (2).
En la figura 2 se muestra la base (1) la cual a su vez comprende una barra (1.1) de fibra de vidrio y un brazo soporte (1.2) metalico fijado a la misma mediante una abrazadera (1.3), en el que la barra (1.1) y la abrazadera (1.3) son de fibra de vidrio libre de boro, por ejemplo de calidad ECR, la fijacion de la abrazadera (1.3) a la barra (1.1) es por pegado con resina mediante enrollado de filamento, de manera que el cortacircuitos cumple las normas IEC 602828-2 y IEC 61109.Figure 2 shows the base (1) which in turn comprises a fiberglass rod (1.1) and a metal support arm (1.2) fixed thereto by means of a clamp (1.3), in which the bar (1.1) and the clamp (1.3) are made of boron-free fiberglass, for example of ECR quality, the fixing of the clamp (1.3) to the bar (1.1) is by bonding with resin by means of filament winding, so The circuit breaker complies with IEC 602828-2 and IEC 61109 standards.
Ventajosamente el brazo soporte (1.2) se fija en el centro de la barra (1.1), como se representa en las figuras 1 y 2.Advantageously, the support arm (1.2) is fixed in the center of the bar (1.1), as shown in Figures 1 and 2.
En concreto, se prefiere que la relacion entre la distancia Y desde el extremo de la barra (1.1) hasta su centro y la anchura X de la abrazadera (1.3) desde dicho centro cumpla la relacion 0.09Y<X<0.33Y. Opcionalmente, el espesor E de la abrazadera (1.3) esta entre 7,5 y 23,5 mm.In particular, it is preferred that the relationship between the distance Y from the end of the bar (1.1) to its center and the width X of the clamp (1.3) from said center meets the relationship 0.09Y <X <0.33Y. Optionally, the thickness E of the clamp (1.3) is between 7.5 and 23.5 mm.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201431140A ES2557955B1 (en) | 2014-07-29 | 2014-07-29 | Eject fuse circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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ES201431140A ES2557955B1 (en) | 2014-07-29 | 2014-07-29 | Eject fuse circuit breaker |
Publications (2)
Publication Number | Publication Date |
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ES2557955A1 ES2557955A1 (en) | 2016-01-29 |
ES2557955B1 true ES2557955B1 (en) | 2016-11-10 |
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ES201431140A Active ES2557955B1 (en) | 2014-07-29 | 2014-07-29 | Eject fuse circuit breaker |
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Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5191311A (en) * | 1992-06-18 | 1993-03-02 | Firon Metal Industries Ltd. | Switch for use as a vertically mounted cut out or in-line switch |
US5406033A (en) * | 1992-09-02 | 1995-04-11 | Maclean-Fogg Company | Insulator structure and method of construction |
US6593842B2 (en) * | 2001-04-26 | 2003-07-15 | Hubbell Incorporated | Polymeric cutout assembly |
US7683751B2 (en) * | 2007-01-18 | 2010-03-23 | Eaton Corporation | Fuse mounting member |
US9408649B2 (en) * | 2008-09-11 | 2016-08-09 | Innovasis, Inc. | Radiolucent screw with radiopaque marker |
KR20110135686A (en) * | 2010-06-11 | 2011-12-19 | 윤재선 | Unsaturated polyester resin composition for pvc frp double composite pipe by filament winding |
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