A Simple Pulse-Height Analyzer for Partial-Discharge-Rate Measurements

A single-channel pulse-height analyzer with suitable pulse-shaping circuits designed for partial-discharge measurements is described. The circuit of the pulse-height analyzer has a basic resolution limit of 1.5 ¿s. The unit may be used in conjunction with an RLC-type partial-discharge-detection circuit and is thus applicable to discharge measurements on high-voltage apparatus such as transformers, capacitors, and cables. Typical results, obtained with an artificial void simulated with metallic-dielectric electrodes, are presented.