Kabushiki Kaisha Toshiba

Keiichi Abe

Tokihiro Umemura

In a method of diagnosing aged degradation of an oil-filled electrical equipment such as oil-filled power transformers, an amount of organic compounds, other than a combustible gas, dissolved in an insulation oil employed in the equipment is detected. The degree of aged degradation of the equipment is determined based on a result of detection of the amount of organic compounds.

Method of diagnosing aged degradation of oil-filled electrical equipments

A partial discharge detecting device for transformers includes an antenna disposed in a metallic insulation gas filled tank enclosing a core and coil assembly and a signal processing circuit for processing an output signal from the antenna. The antenna includes a magnetic core and a single coil or two coils differently operated. An electromagnetic wave due to the partial discharge is detected by the antenna. A detection signal from the antenna is supplied to the signal processing circuit, which determines whether or not the partial discharge has taken place, based on the detection signal.

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Kasugai, Japan

Keiichi Abe