Abstract: To provide a cylindrical printed board in which a processing shape is maintained, and a printed-board-integrated molded article in which the cylindrical printed board is integrated with an inner wall of a hole portion in a molded article. A cylindrical printed board 1 according to the present invention is a printed board 4 including an insulator substrate 2 and a conductor pattern 3 formed on the insulator substrate 2, wherein the printed board 4 is rolled beyond one full circle to form a cylindrical shape. In addition, a printed-board-integrated molded article 40 includes a molded article 20 constituting a casing that has a cylindrical part, and the cylindrical printed board 4 that is integrated with an inner wall 21a of a hole portion 21 in the cylindrical part of the molded article 20.

Abstract: A redundant over-voltage protection/power distribution system for a macro/distributed antenna telecommunications system. The overvoltage protection system includes first and second surge protection devices each having one end electrically connected to the power cable upstream of an RRU and a second end electrically connected to ground. The first and second surge protection devices issuing an alert signal when one of the devices is in a failed condition and changing state to provide the RRUs with uninterrupted power for continuous operation of the telecommunications system when one of the surge protection devices has failed.

Abstract: The present invention relates to a multistage fuse, and more particularly, to a multistage fuse including: a fuse module including a first fuse bar formed in a bar shape as a conductive member; a melted portion which supports the first fuse bar and is melted when overcurrent flows; and a second fuse bar which supports the melted portion; and a contact terminal which contacts the first fuse bar by elastic force, in which when the overcurrent flows on the melted portion, the melted portion is melted to disconnect the first fuse bar and the contact terminal.

Abstract: A redundant over-voltage protection/power distribution system for a macro/distributed antenna telecommunications system. The overvoltage protection system includes first and second surge protection devices each having one end electrically connected to the power cable upstream of an RRU and a second end electrically connected to ground. The first and second surge protection devices issuing an alert signal when one of the devices is in a failed condition and changing state to provide the RRUs with uninterrupted power for continuous operation of the telecommunications system when one of the surge protection devices has failed.

Abstract: The present invention relates to a surge protection device for multi-protection mode communications, comprising: an input line into which a voltage is introduced; an output line connected to an external line; a surge discharge part provided with a ground terminal; a surge protection circuit part provided between the input line and the output line and having at least two or more surge protection circuits provided in parallel and discharging the introduced voltage to the ground terminal if the introduced voltage is a surge voltage; circuit conversion parts for selectively connecting the input line and the output line to any one of the surge protection circuits; a condition measuring part for measuring an input voltage introduced into an input terminal of the input line and a second discharge voltage from the surge protection circuit to the ground terminal and comparing each of the input voltage and the second discharge voltage with preset reference voltages; and a control circuit part for detecting abnormality

Abstract: A fuse used in a semiconductor memory device. The fuse is formed with a “X” shape where one circuit may be connected simultaneously to a plurality of other circuits. As a result, a fuse region is reduced, and the cutting number is also decreased, thereby lowering the possibility of defects resulting from cutting errors.

Abstract: An electrical enclosure includes a housing having a first end, an opposite second end, and a plurality of sides disposed therebetween to define an internal volume; an electrical busway having a number of electrical bus members, wherein at least one of the number of electrical bus members has a first bus member, a second bus member and a number of fusible links electrically connected between the first bus member and the second bus member, wherein the at least one of the number of electrical bus members is structured to electrically conduct a rated current, wherein the number of fusible links are structured to electrically conduct the rated current, and wherein the number of fusible links are structured to vaporize responsive to a current which is substantially greater than the rated current.

Abstract: A fuse holder (20) is provided that can be installed in the place of a dropout fuse element in an electrical insulating unit (1). The fuse holder has an elongate electrically insulating body providing at least one electrically insulated elongate fuse housing in the form of a passage (21) associated with the body and adapted to receive a fuse wire (22) held under tension therein. The body can be installed in such insulating unit as a replacement to an existing dropout fuse element (5) and itself provides contacts enabling such a conventional dropout fuse element to be installed in the fuse holder body from which it can drop out when the fuse is blown. A switch arrangement is provided for maintaining a fuse in the passage in an inoperative condition whilst a dropout fuse element is functional and for automatically closing an electrical circuit through a fuse installed in said passage when the dropout fuse becomes blown and drops out of the fuse holder.

Abstract: A primary electrical fuse is attached to a printed circuit board. The primary electrical fuse comprises a first and second terminal, a fusible element disposed between the first and second terminals electrically linking the first terminal and the second terminal, and receiving tip sections located on the first and second terminals that receive a replacement electrical fuse to electrically connect the first and second terminals with a replacement fusible element.

Abstract: A fusible link receptacle that, when a fusible link is inserted in the receptacle at an inclined angle, prevents both damage to tab connectors and faulty connections between terminals in the fusible link and the tab connectors. Tab connectors extend from internal circuits into the internal region of the fusible link receptacle, and a rib is formed on the internal surface of the perimeter wall and extends to a point above the leading edges of the tab connectors. Should an attempt be made to insert the fusible link into the fusible link receptacle at an inclined angle, the rib makes interfering contact with the lower edge of the fusible link to prevent further insertion.

Abstract: A surface mount fuse having a plurality of fusible links is provided. The links are located on opposite sides of an insulative substrate or one otherwise thermally insulated or decoupled from one another. The fuse links entered to terminals that can be asymmetrically secured to the substrate to discourage improper mounting. The fuse protects multiple different circuits or loads having a same common or grounded line.

Abstract: Fuse switch having a housing for receiving contacts and a fuse holder, which has a receptacle for a fuse element, and which is mounted in the housing such that it can pivot between at least one first and one second operating position, in which the housing receives an encoding element, which is provided at least partially in the pivot region of the fuse holder, and in which the encoding element bears a flexible blocking element, which extends in the direction of the fuse holder and senses the fuse element in terms of its outer diameter.

Abstract: A fault current limiting system includes switching means for providing a fast switching operation; a parallel current path comprising a limiting fuse; and a switching system to automatically replace a blown set of fuses with an unblown set of fuses after a fault current limiting operation has occurred. A method of limiting fault current includes providing a fast switching operation; providing a parallel current path comprising a limiting fuse; and automatically replacing a blown set of fuses with an unblown set of fuses after a fault current limiting operation has occurred.

Abstract: A fuse holder assembly (1) is provided having at least two electrically insulated fuse housings in the form of passages (5, 33) associated with the body and each of which is adapted to receive a fuse (6) held under tension therein by means of an elongate tension member (7) and cooperating spring loaded tensioning element. The fuse housings have separate intermediate contacts (16, 17, 34, 35) at one end adapted for sequential connection to a circuit contact (20) by way of a rotatable conductive arm (18, 37) spring loaded to effect rotation of the arm from one intermediate contact to the other. Stop means (22, 23, 36 39) for temporarily maintaining the arm in association with one intermediate contact against the spring loading of the arm acts to release the arm for movement towards a subsequent intermediate contact only when the spring loaded tensioning element has substantially reached the end of its operative movement to clear the blown fuse.

Abstract: A fuse holder and method of building the same, the fuse holder comprising: a fuse having a pair of fuse terminals; a housing configured to accept any fuse carrier selected from a plurality of fuse carriers, the housing defining an enclosed region adapted to accept the fuse; a pair of contacts within the housing at opposite ends of the enclosed region and configured to engage the fuse terminals; and a fuse carrier selected from the plurality of fuse carriers, the fuse carrier configured to support the fuse and position the fuse terminals in the enclosed region in electrical engagement with the pair of contacts.

Abstract: The fuse assembly includes a first fuse. The first fuse includes a first housing. The first fuse includes a pair of first terminals having a first pitch between the first terminals and projecting from the first housing in a mounting direction. The assembly Includes a second fuse. The second fuse includes a second housing. The second fuse includes a pair of second terminals having a second pitch between second terminals identical to the first pitch and provided on both sides of the second housing. The assembly includes a mounting component mated with the first fuse or the second fuse. The mounting component includes mating terminals within the mounting component for electrically conducting with the first terminals or second terminals. The mounting component includes a first stopper configured to position the first fuse relative to the mounting component for electrically connecting the first terminals and the mating terminals with each other.

Abstract: A fuse holder comprising: a housing defining an enclosed region, the housing comprises a base and a cover, the base and cover adapted to accept differently configured cage holders within the enclosed region; a pair of contacts within the housing at opposite ends of the enclosed region and spaced to engage terminals on ends of a fuse; and a first cage holder and second cage holder configured to fit within in the housing, each cage holder of the first and second cage holders includes either a single pole cage or a plurality of pole cages.

Abstract: A fuse handling device for use with a fuse unit having a pair of contacts between which a fuse terminals which act as switching contacts may extend in use. The handling device comprises an actuating lever operable into a first position and a second position, a charging means operably connected to the actuating lever and a drive means operably connected to the charging means. The handling device in use is mounted on the fuse unit. The drive means attaches to the fuse and operation of the actuating lever into the first position charges the charging means to causes the drive means to extract the fuse from the pair of contacts and operation of the actuating lever into the second position charges the charging means to cause the drive means to insert the fuse into the pair of contacts. The fuse moves in a direction parallel to a plane of its switching contacts.

Abstract: A circuit fuse assembly comprising a plurality of fuse elements which are simultaneously formed using printed circuit or through hole plating techniques and including means for easily substituting a different one of the plural fuse elements when the in-circuit fuse element burns out due to an overload current condition. In the preferred embodiment, the fuse assembly is (a) integrally formed with the printed circuit of the fused electrical apparatus and (b) formed with a common electrical connection such that a single electrical bridge of solder or other means enables substitution of a replacement fuse element. Other embodiments of the present invention provide a restorable printed circuit fuse for use in standard fuse holders, in-line plug connectors, conventional three prong plug connectors, edison bases, and plug-in triple outlets.

Abstract: This load-break fuse equipment comprises two draw-out fuse assemblies, one of the load-break type and one of the non-load-break type, each removably mounted in its own individual receptacle. The load-break fuse assembly and its receptacle comprise a load-break switch and a fuse electrically connected in series with each other. The non-load-break fuse assembly comprises a fuse, and this fuse is electrically connected in parallel with the fuse of the load-break fuse assembly and in series with said load-break switch.

Abstract: A current limiting fuse and an expulsion fuse are disposed in side by side relationship on a common supporting structure. One terminal of each fuse are interconnected electrically. The other terminals of each fuse are spaced by a predetermined insulating gap. An external circuit which includes a voltage source and a load to be protected is connected in series circuit relationship with the terminals of the expulsion fuse. The current limiting fuse is only disposed in circuit relationship with the external circuit for current limiting purposes when the expulsion fuse blows because of a relatively high value of fault current. This causes gaseous products to be directed from an internal portion of the expulsion fuse to a region between the unconnected terminals of both fuses.