Triggered fuse for low-voltage applications

Abstract

The invention relates to a triggered fuse for low-voltage applications for protecting devices that can be connected to a power supply system, in particular surge protection devices, consisting of at least one fusible conductor which is located between two contacts and is arranged in a housing, and also consisting of a trigger device for controlled disconnection of the fusible conductor in the event of malfunctions or overload states of the respective connected device, wherein an arc quenching medium is introduced into the housing. By way of example, an arc quenching medium-free region is formed in the housing such that the at least one fusible conductor is exposed, and a mechanical disconnection element can be introduced into the arc quenching medium-free region via an access point in thehousing in order to mechanically destroy the at least one fusible conductor depending on the trigger device, and independently of its melting integral.

Description

technical field [0001] The invention relates to a triggerable fuse for low-voltage applications for protecting devices connectable to a power supply network, in particular an overvoltage protection device, the triggerable fuse comprising at least one fusible conductor arranged in the housing between two contacts and having trigger means for controlled disconnection of the fusible conductor in the event of a malfunction or an overload condition of a correspondingly connected device , wherein an extinguishing agent is introduced into the housing. Background technique [0002] Conventional fuses are used extensively and in many applications to ensure overcurrent or short-circuit protection for cables and lines and for connected operating components. [0003] Furthermore, the fuse is used as a backup protection device for so-called series-connected surge absorbers. Here, corresponding fuses must ensure protection in the event of a short circuit. [0004] Due to the increasing...

AI Technical Summary

Problems solved by technology

In some cases, the selected fuse may no longer ensure the protection described under all conceivable infeed conditions

In principle, the use of power switches with tripping characteristics is an alternative here, but these switches are much more expensive than fuses and in this respect are not suitable for all applications for cost reasons

[0005] In principle, the unique properties of fuse cutouts allow only very few design possibilities in terms of changing and adjusting the protective range of the cutout

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