A fusible disconnect switch devices includes dual sets of switch contacts to connect or disconnect a current path through an overcurrent protection fuse with reduced arcing severity. Faster acting and longer contact path switch mechanisms are described providing satisfactory switching of DC circuits without excessive electrical arcing in a reduced physical package size.

The present invention provides a fuse unit, which reduces the number of components of a bus bar and eliminates alignment of tuning fork terminals, and a method of manufacturing the fuse unit. Disclosed is a method of manufacturing a fuse unit, which includes a bus bar including a battery terminal, a fuse connection terminal, and an external connection terminal and is manufactured by integrating the bus bar and a resin covering body by insert molding. In this manufacturing method, the fuse connection terminal is constituted of an input side tuning fork terminal connected to the battery terminal and an output side tuning fork terminal connected to the external connection terminal, the input side tuning fork terminal and the output side tuning fork terminal are connected by a joining portion so as to face each other, the bus bar including the fuse connection terminal is integrated with the resin covering body by insert molding. After the insert molding, the joining portion is cut and removed through a cutting window of the resin covering body, which exposes the joining portion to the outside, and the input side tuning fork terminal and the output side tuning fork terminal are separated.

A high current fusible disconnect switch device includes a switch housing configured to receive a pluggable touch-safe fuse module, and a dual slide bar actuator assembly for opening and closing switch contacts. The dual slide bar elements are each coupled to bias elements that store and release energy to affect switch opening and closing operations. The switch opening and closing operation is multi-staged wherein the only the first slider element is movable in the first stage, and both the first and second slider elements are movable in the second stage.

A fuse holder provides a safe device for connecting fuses to a three-phase busbar device. Each phase includes a corresponding load conductor and line conductor mounted within a housing. A mechanical lock is provided for each phase that locks a knife of the fuse to one of the conductors for the phase. In a further aspect, the fuse knives are frictionally locked within the housing. In both the mechanical lock and frictional lock, a release mechanism is provided that can be activated by a screwdriver to release the fuse knives from the fuse holder. In another aspect, certain conductors are provided with heat dissipation wings that contact the housing to dissipate heat generated by current flowing through the conductor.

A fuse holder (10) for a high-voltage system for accommodating an electric fuse link (13), comprising a bottom part (11) and a cover (12), which, when assembled, form a housing that serves to accommodate a fuse link (13). The fuse link (13) has two opposite terminal lugs (131), which can be fixed in the cover by means of fastening screws (14), so that, together with the cover (12), the fuse link (13) forms a unit, which is fastened on the bottom part (11) by means of the fastening screws (14).

The invention concerns a device for protection against transitory overvoltages, comprising: a varistor; a discharge tube; a thermofusible soldering securing a first electrode of the discharge tube and a first electrode of the varistor, the thermofusible soldering being a conductor of electricity and being able to melt beyond a temperature threshold when the varistor or the discharge tube heats up; the second electrode of the varistor being designed to be connected to a first electrical line and the second electrode of the discharge tube being designed to be connected to a second electrical line; a restoring element exerting a restoring force tending to move the first electrode of the varistor away from the first electrode of the discharge tube in order to allow a separation between the first electrode of the varistor and the first electrode of the discharge tube during a melting of the thermofusible soldering.

A fuse assembly according to an exemplary aspect of the present disclosure includes, among other things, a housing, a fuse received within a receptacle of the housing and a retention device configured to retain the fuse within the receptacle and cover a conductive surface of the fuse.

A vertically-oriented blade fuse system requires less surface area on a printed circuit board, provides improved heat dissipation, is less expensive to manufacture and assemble and is more reliable. It comprises a fuse having two connection plates that extend away from each other in opposite directions. One of the plates is forced into a fork-shaped connector, which grabs both sides of the plate. The other connection plate is fit into a mating female connector. Multiple vertically-oriented fuses, laterally spaced from each, are connected to corresponding connection forks and female connectors inside a housing, which can be latched to a circuit board.

Provided herein are approaches for securing an electrical protection device (e.g., a fuse). In one approach, an apparatus includes a conductor and a terminal coupling the conductor to the fuse, wherein the terminal includes an end cap having a cavity for receiving and securing the conductor, and a set of contact elements extending from a base member. The base member may be coupled to the end cap, and a body of the fuse may be coupled to the base member. In some approaches, a fuse blade of the fuse is disposed between the set of contact elements. In some approaches, the apparatus further includes a cover adjacent the terminal, wherein the cover is configured to engage the contact elements to increase a contact force and electrical connection between the set of contact elements and the fuse blade.

A high current fusible disconnect switch device includes a switch housing configured to receive a pluggable touch-safe fuse module, and a dual slide bar actuator assembly for opening and closing switch contacts. The dual slide bar elements are each coupled to bias elements that store and release energy to affect switch opening and closing operations. The switch opening and closing operation is multi-staged wherein the only the first slider element is movable in the first stage, and both the first and second slider elements are movable in the second stage.