overcurrent protection device

Abstract

The invention relates to an overcurrent protection device for use in an overvoltage protection device, comprising an additional mechanical trigger in the form of a striker. According to the invention, a first functional unit contains the mechanical trigger and has a first melting element. A second functional unit forms the overload protection and has a second melting element. Each functional unit is arranged in a housing, wherein on the corresponding housing there is a laterally opposite closing cover and the fuse or melting element is respectively located inside the housing and is electrically connected to the closing cover, the first and the second function The units are connected electrically in parallel and the parallel connection is connected in series with the overvoltage protection device and the functional units form a common mechanical assembly, in which each housing consists of a separate electrical casing or both casings consist of a common elastic casing or an additional but surrounded by an elastic shell.

Description

technical field [0001] The invention relates to an overcurrent protection device for use in an overvoltage protection device with an additional mechanical trigger in the form of a striker. Background technique [0002] Overvoltage protective devices are used in power grids and IT networks to protect equipment, loads and terminal devices. [0003] Such overvoltage protection devices limit the voltage to non-dangerous values, in particular in overvoltage events such as lightning events. [0004] In the event of an overvoltage, this limitation is achieved by the conduction of a pulsed current in a transverse path and thus overall in parallel with the load connection. [0005] In other cases spark gaps, varistor diodes, suppressor diodes, gas arresters and varistors and combinations thereof are used as overvoltage protection elements. [0006] The above-mentioned elements generally have a non-linear response characteristic or a non-linear characteristic curve. [0007] Gradua...

AI Technical Summary

Problems solved by technology

As a result this can lead to false indications of conventional electrical energy-based devices

In addition to the fault display of the discharge state, this also leads to the destruction of the surge arrester and / or the safety device when the pulse is reapplied

In addition the load is endangered due to a faulty overvoltage protection device

The risk to the load is significantly increased especially with the use of so-called combined arresters

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