Relationship between gaseous phase transition and bridge phenomena in Ag,Pd break arc (国際セッションIS-EMD2002〔英文〕)

概要

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For Ag and Pd contacts, the relation between transition boundary to gaseous phase and bridge voltage for break arc, is investigated under the several circuit condition. In both contacts, contact resistance Rc becomes maximum value at the transition boundary closed contact current Io(50). At larger current than Io(50), Rc decreases with increase of Io. In Ag contacts, the occurrence times of re-bridge rapidly decreases when transition to gaseous phase was made. Furthermore, the boiling voltage Vb of first bridge rapidly decreases at larger current than Io(50). On the other hand, in Pd contacts, the boiling voltage Vb and Vbe for first brige and last re-bridge have nearly constant value (1.2 to 1.3V) which is peculiar to the material, even if arc transits to the gaseous phase.
一般社団法人電子情報通信学会の論文
2002-11-08