抄録
Breaking arc durations and differences between the mass of a contact before and after an experiment, that is a quantity of metal erosion and transfer (QMET), were measured in Ag-Pd alloy contacts. The experiments were tried in air at some conditions of voltage, current and opening speed. The characteristics of arc durations and QMET studied how to change due to metal mixing ratios.
In a practical Ag 40 wt%contact, the arc duration was not specially longer, and the loss was not more than the others. In Ag 90 wt%contact, the arc duration had a great tendency to be longer at some conditions, and then the loss was much. The arc duration of Ag 20 wt%had a tendency to become long with operations. The characteristics of arc duration and QMET were different due to two ways of fixing a columnar contact from one side to a holder and from two side. The curves of QMET were zero-crossed, and there were the mixing ratio that the QMET became zero for the one of the electrodes.
This paper might suggested some way of a design of electrode for heat produced in the Ag-Pd alloy contacts and the possibility of zero QMET.
