MAIN CIRCUIT ABNORMALITY DETECTION DEVICE FOR SEALED SWITCH

摘要

PURPOSE:To obtain a main circuit abnormality detection device for a sealed switch capable of immediately and accurately detecting the existence of abnormality in a main circuit without losing the reliability of insulation in the main circuit to be a high voltage part. CONSTITUTION:Oscillation wave input means 6 to input a standard oscillation wave to a main circuit 4 contained in a vessel 2 of a sealed switcher charged with insulation matter is provided in the vicinity of an insulator 5 connected to the end of the main circuit and outside of the vessel 2. Also an oscillation detection means 8 to detect the oscillation wave transmitted to the main circuit 4 is provided in the vicinity of an insulator 7 connected to the main circuit 4 and outside of the vessel 2. A judgment means 9 is provided to judge the existence of an abnormality in the main circuit 4 by comparing the oscillation wave detected by the oscillation wave detection means 8 with the oscillation wave transmitted to the main circuit 4 from the standard oscillation wave in normal state of the sealed switcher.