摘要:
A fuse link used in alternate current medium- or high-voltage systems with a current frequency of 50 Hz includes a spring-type striker pin and is designed for the protection of electrical devices against consequences of short circuits and overloads. A porcelain housing with a star-core, external end caps closed by plugs, star-core end caps with a ring-shaped first tap designed to ensure electric contact between the star-core end cap and the external end cap of the fuse link is also included. A spring-type striker pin is positioned along the axis of the star-core. Each of the end caps of the star-core is provided with an additional second tap designed to centre the star-core relative to the axis of the fuse link. The spring-type striker pin is centred along the longitudinal axis of the fuse link.
摘要:
A compact, high breaking capacity fuse that includes a top insulative layer, at least one intermediate insulative layer, and a bottom insulative layer arranged in a vertically stacked configuration. The at least one intermediate layer may have a hole formed therethrough that defines a chamber having arc suppression material disposed therein. A first conductive terminal may be formed on a first end of the fuse and a second conductive terminal may be formed on a second end of the fuse. At least one fusible element may connect the first terminal to the second terminal, thus providing an electrically conductive pathway therebetween. A portion of the at least one fusible element may pass through the air gap defined by the hole in the at least one intermediate insulative layer.
摘要:
A fusible conductor for a fuse element includes an electrically insulating core a fusible wire wound about the core and at least one electrically insulating fiber wound about the core parallel to the fusible wire such that the fusible wire is fixed in position so that a short circuit of adjacent turns of the fusible wire is prevented.
摘要:
The fuse is used in the medium- and high-voltage sector and has two spaced-apart power supply connections (2, 3) and an active part (1). The active part comprises a fusible, current-carrying fuse element and an arc-extinguishing medium. The fuse element is connected in an electrically conducting manner to the two power supply connections and is arranged on an electrically insulating substrate. It is of a modular construction and has at least two modules (9) connected in series. The arc-extinguishing medium covers the exposed surfaces of the fuse element. The active part is formed in the manner of a sandwich and has two stable moldings (4, 5) and a predominantly planar intermediate layer (6) arranged between the moldings (4, 5). The intermediate layer (6) contains at least the two series-connected modules, whereas a first molding (4) of the two moldings is formed at least by part of the electrically insulating substrate and the second molding (5) is formed at least by part of the arc-extinguishing medium. The fuse is distinguished by a simple construction and by favorable triggering characteristics.
摘要:
An electric fuse having a support for the helically wound fusible element or elements. The support includes a plurality of rod-like supports each made of one uniform material. Some of the plurality of rod-like supports consist solely of a non-gas-evolving material, while at least one of the plurality of rod-like supports consists solely of a gas-evolving material.
摘要:
A time-delay fuse is provided comprising a glass or ceramic tube sealed at both ends with a sealing means such as, e.g., ferrules. The fuse also comprises a generally cylindrical core member of poor heat conductivity (e.g., porous sintered mixture of alumina and clay), and a fusible high melting wire element wound densely on the middle region of said core member, thence sparsely toward the terminals and again densely at the ends where the fusible wire element is soldered by a high-melting solder element.
摘要:
A high voltage fuse is provided with a fabricated insulating mandrel made up of a center post having grooves extending in a direction longitudinally of the post and regtangular insulating plates each engaging with one edge thereof one of the grooves in the center post. Other edges of the insulating plates engage grooves provided in the axially inner end surfaces of a pair of terminal plugs closing the ends of a fuse tube or casing. Thus each relatively fragile insulating plate is supported along three edges thereof.
摘要:
A current limiting fuse structure comprising a generally tubular, electrically insulating casing having terminal means disposed adjacent to the opposite ends thereof. One or more fusible elements is connected between the terminal means. An electrically insulating support member is disposed in the casing of the fuse structure with the ends axially spaced from the respective terminal means. The intermediate portion only of each fusible element is disposed on the associated insulating support member and the end portions extend axially between the ends of the associated support member and the adjacent respective terminal means.