The current collector supplies electric power on the move, when it is mounted on the subway, overhead traveling crane, or automatic conveyer line. The current collector should have high lubricating characteristics and conductivity, as well as high abrasion resistance and hardness, while not damaging the counterpart current supplying rail.
Ag-Gr and Cu-Gr materials are used as the contact point for communication device, DC relay, sliding device, and carbon for current collection, as these materials provide excellent seizure resistance and sliding characteristics. In particular, these materials are used as carbon for current collection, such as automatic conveyor aging brush and overhead traveling crane for subway
This contact point is produced with inner oxidation by melting metallurgy. This contact point provides excellent electric conductivity, seizure resistance, and consumption characteristics. It is mainly used for various relays, electromagnetic switches, and contact point for ATS, ACB, and other.
However, materials are replaced by Ag-W and Ag-Ni, due to the recent EU environmental regulations.
Carbon brush is an important part that plays a current supplying and rectifying role, by contacting a commutator of various turning devices like AC and DC device of electric machine, or by sliding and contacting the turning part surface of slip ring. Carbon brush has the feature of high lubricative characteristics and conductivity, heat and ARC resistance, and low friction.
In particular, silver carbon (Ag-C) is used to keep stable contact electronically. It is used for ultra-low voltage (mV) contact brush.
Ion-stick is made by mixing copper power and silver power by the specific proportion. It is used as an electrode for sterilization in a swimming pool, filtration plant, and waste water treatment plant.
