Switching performance of AgW-Ag(Sn,In)O and AgW-AgSnO/sub 2/ contact pairs

Proceedings of the Thirty Fifth Meeting of the IEEE Holm Conference on Electrical Contacts Pub Date : 1989-09-18 DOI:10.1109/HOLM.1989.77906

P. Slade, Y. Chien, J.A. Bindas

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引用次数: 3

Abstract

Experiments were conducted to determine the switching performance of Ag-W contacts when operated in combination with Ag-(Sn,In)O and Ag-SnO/sub 2/ materials. Contact pairs for each combination were evaluated in an experimental actuator at a current of 150 A. The Ag-W contact was always the moving contact. The experimental procedure consisted of the following steps: (1) the new contacts were closed, a steady current of 150 A was passed, and the voltage drop (V/sub c/) across the contacts and the temperature rise (T/sub r/) of the back of the fixed contact were measured; and (2) the contacts then switched a 150-A, 600-V (rms) circuit for 2000 operations. After this, step (1) was repeated. Both the Ag-W vs. Ag-(Sn,In)O and the Ag-W vs. Ag-SnO/sub 2/ contact pairs gave low values of V/sub c/ when new, a characteristics of good Ag-to-Ag contact. After 2000 operations the V/sub c/ values for both contact combinations were very high and variable. Metallurgical examination of the contacts showed arc-resistant, oxide surfaces containing complex oxides of Ag, Sn, and In alloys as well as complex tungstates formed from combinations of Ag, Sn, and In.<>

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AgW-Ag(Sn,In)O和AgW-AgSnO/sub 2/触点对的开关性能

实验研究了Ag-(Sn, in)O和Ag- sno /sub - 2/材料复合作用下Ag- w触点的开关性能。每个组合的接触对在150a电流的实验执行器中进行评估。Ag-W接触总是移动接触。实验步骤如下:(1)闭合新触点，通过150a的稳态电流，测量触点两端的压降(V/sub c/)和固定触点背面的温升(T/sub r/);(2)触点然后切换150-A, 600-V(均方根)电路，用于2000次操作。在此之后，重复步骤(1)。Ag- w对Ag-(Sn,In)O和Ag- w对Ag- sno /sub 2/接触对在新时均具有较低的V/sub c/，具有良好的Ag- Ag接触特性。在2000年操作之后，两种接触组合的V/sub / c/值都非常高且可变。触点的冶金检查显示，抗电弧的氧化表面含有Ag、Sn和In合金的复合氧化物，以及由Ag、Sn和In组合形成的复合钨酸盐。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the Thirty Fifth Meeting of the IEEE Holm Conference on Electrical Contacts

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