Mitja Koprivšek - Varistor fuse or Fuse with integrated varistor

Mitja Koprivšek, M.Sc

ETI Elektroelement d.d.,

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Metal-oxide varistors, or MOV’s are well known solution for protection of electrical installations against transient over-voltage impulses, occurred as a consequence of lightning and switching processes. By experience we know, that the MOV’s has to be protected by an overcurrent protection device to cut the abnormal current, occurred by improper behaviour of MOV caused by temporary over-voltage. One of such protection devices are special fuses, known as Surge Rated Fuses.

This contribution shows very new construction of integrated product, where both, MOV and a Fuse are incorporated in one product. Advantage of this idea is mainly in strongly reduced dimension.

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