Chinatungsten
are able to provide kinds of tungsten copper contacts, and the tungsten copper
contacts spares is a kind of tungsten copper contacts. It is used as electrode.
Tungsten copper contacts spares has good resistance to arc erosion, mechanical wear,
contact welding and good conductivity. They are usually selected for oil, gas,
air or vacuum, devices. The contact surfaces will oxidize when switched in air.
These press-sinter-infiltrate materials should only be considered for arcing
surfaces in air when used as arcing tips, arc plates and arc runners. When
switching with moderate contact arcing, the tungsten copper with a high copper
content may give the lowest erosion. As arcing severity increases, the tungsten
copper with the higher refractory content withstand arc erosion better.
Tungsten copper contacts spares are also used as arcing edges of selector
switchblades in transformer tap changers.
Tungsten
copper contacts spares materials made of WCu are also characterized by the properties
of high arc erosion resistance, good electrical conductivity, excellent strength,
very good machinability, good thermal conductivity and low thermal expansion.
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