The effect of ambient on performance of electrical contact pairs for rotating contact devices of satellites for remote sounding of Earth

Abstract

The brushes of powder composites of the Ag—Co—MoS₂ system and slip rings of hard silver were tested in vacuum, argon and air. The test conditions: current — 0—3 A, voltage — 30 V DC, speed — 240 rev./min, test times — 700—1000 hours. In air wear resistance of the parts falls in 5—20 times (brushes) and in 1,5—5 times (slip rings) in comparison with vacuum and argon, distinctions of other parameters are insignificant.