Lightning arrester monitor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakeo Yoshioka, Masahiro Kobayashi, Tadao Minagawa, Katsu Ujita
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Abstract
A lightning arrester monitor which consists of an oxygen gas sensor provided in a lightning arrester having a zinc-oxide-type element made of zinc oxide, the main component thereof, and other oxides added thereto, the oxygen gas sensor measures the oxygen concentration of the element which increases as degradation thereof goes on. The monitor makes it possible to assess degradation of the zinc-oxide-type element with ease, without requiring any complicated electrical circuit for detecting leakage current.
Claims8
A lightning arrester monitoring device, comprising an oxygen gas sensor provided in a lightning arrester of the type having a zinc-oxide-type element made of zinc oxide as a main component and other oxides, said gas sensor measures the oxygen concentration in the lightning arrester which increases as degradation of said element goes on.
Dependencies are inferred from the claim text.