AUTOMATIC MEASURING INSTRUMENT FOR SEPARATION- MEASURING THREE COMPONENTS OF FREQUENCY IN LEAK CURRENT FOR POLYMER INSULATOR

摘要

PROBLEM TO BE SOLVED: To newly add a medium frequency component (several kHz) for the purpose of quantitative evaluation of a deteriorated characteristic by a leak current.;SOLUTION: This automatic measuring instrument has an analog filter 1 for separating the leak current in a polymer insulator into a low and medium frequency component and a high frequency component, a partial discharge measuring system 3 for measuring the high frequency component as a pulse component via a tuning amplifier 2, and a digital measurement system for separating the low and medium frequency component into a low frequency component and the medium frequency component by a digital filter 5 and for measuring them.;COPYRIGHT: (C)2003,JPO