price of new type electric contacts is less than 1/2 normal silver contacts

The excellent comprehensive performance of the compound electric contact for low voltage electric equipment, especially the excellent electric longevity, allow it to apply to:

1 Different type of Moulded Case Circuit Breaker: DZ20 CM1 series.

2 Miniature Circuit Breaker: DZ 47 series etc.

3 Different type of Circuit Breaker with Shunt Release: DZ15L, DZ20L series.

4 Air circuit Breaker: DW15, DW16, DW17 series etc.

The new type compound electric material for low voltage electric contact will be the ideal substitutes for silver alloy eclectic contact for low voltage electric equipment, such as switch disconnector, etc.


The New Type compound electric contact martial for low voltage electric equipment is an electric contact material of excellent comprehensive performance, made with the new type silver alloy electric contact material and copper based electric contact material, invented initially by HV ZHONGHAO "-XINZHENGHE", processing these two contact materials into a compound contact material by the specific compound technologic owned and independently developed by the company.

This electric contact material possesses excellent melting-welding resistance, resistance to melting loss by electric arc and relatively long electric longevity. Therefore, that it is applicable to visions kinds of Moulded Case Circuit Breaker, Air circuit Breaker, Miniature Circuit Breaker, Circuit Breaker with Shunt Release, and Residual Current Operated Circuit Breaker.

The new type compound electric contact material for low voltage electric equipments is a double- layer compound comprised of a upper layer of silver alloy electric contact material and lower layer of copper-based electric contact material. The upper layer of silver alloy electric contact material is a new type electric contact material composed of silver – Nickle - diamond micro powder – oxides of rare-earth elements – trace elements. Such new-type silver contact possesses not only excellent welding resistance and resistances to melting loss by arc, but also excellent electric longevity.

The electric longevity of the compound electric contact with a silver alloy layer no more than 0.2 mm thick in the formal examination may satisfy the requirement in technical standards of different kinds of disconnectors to electric longevity of electric equipments. After the completion of the formal examination of electric longevity, the surface of sliver alloy layer of the compound contact still maintain intact, relatively low contact electric resistance and good contact state. During the normal of sat in period of disconnections using the compound electric contact material for low voltage electric equipments, the slivers alloy layers of the compound low voltage electric equipment contact is able to perform the ability of the electric equipment to break and connect the electric current, at the meantime, faults in application of single