電磁式 릴레이 接點의 아-크特性에 관한 硏究

Abstract

This paper deals with the on-off arc characteristics of electromagnetic relay contacts contaminated by Nacl. In this paper, I have studied the characteristics of on-off voltage waveform, the contact erosion, contact surface analysis by SEM and EDAX under changed R-L-C parameter of testing circuit. After considers these result, I have tried to promote the diagnosis method and developed the contacts.

As a results, 1) The arc duration time(off) and the numbers of arc occurrence characteristics are depended on contamination degree. The contamination degree is high when the arc characteristics is high. 2) Under clean condition, Arc occurrence voltage, surge peak voltage, arc duration time and the rate of contact erosion is lower than wet condition. 3) Surge peak voltage and arc duration time is depended on L parameter. When L is high, the characteristics is high. 4) The arc quenching characteristics is occurred at parameter C is high. When L is increased(R const.) or R is decreased(L const.), C is high to eliminate the arc.