DIAGNOSTIC SIGNAL PROCESSOR

A diagnostic signal processor for diagnosing partial discharges within gas insulated equipment, comprising a sensor module (2) which decomposes an electromagnetic wave signal detected by a partial-discharge sensor (1) that detects the electromagnetic wave signal propagating within the gas-insulated equipment, into a plurality of feature quantities corresponding to various physical quantities represented by the waveform of the signal and then collects the feature quantities, wherein the feature quantities to be collected by the sensor module (2) are set at positive and negative first-wave crest values A and B, the half-value width W t of the first-wave crest value, the envelope waveform y of a high-frequency signal, the attenuation time constant T of the high-frequency signal, the pulse interval information W T between partial-discharge signals, and a pulse density N. The diagnostic signal processor can flexibly cope with the alterations of various processing conditions. A host signal processor (3) governs the sensor module (2) and designates the required feature quantities. Preferably a plurality of partial-discharge sensors (1a - 1d) and a plurality of sensor modules (2a - 2d) are governed by the host processor.