Sell New Type Of Electric Contact

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 copper-based contact material due to oxidation and corrosion non-resistance of the working surface of the contact during operation, causing instability of surface electric resistance resulting in raising of disconnections, and able to be overcome the thickness of the layer of sliver alloy electric contract may be processed according to requirements of customer, and different kinds of disconnectors. Under the silver alloy contact material layer is compounded a layer of improved copper based electric contact material. Copter based electric contact material is a autistic silver electric contact material invented in recent years with relatively good performance. Diamond micro powder and the alloy elements are added into copper based material, so that copper alloy is able to gain certain anti oxidation ability, at the same time, excellent melting-welding resistance at the same time, and resistance to melting loss by eclectic arc, and rather good effects obtained in using on a part of low voltage electric equipments, such as different type of disconnector. While non-silvers copper based eclectics contact material possesses a certain anti oxidation ability yet in operation, oxidation of the surface of copper based contact often occurs, electric resistance surface increases causing the temperature raising of disconnectors. Especially during the operation of disconnectors melting loss of high temperature elective are on the surface of contacts may damage the integrity of the surface of contacts, greatly influence the surface elective resistance of the copper based contact and so the popularization of application of non-sliver copper based contact in the low voltage electric equipment industry. An improved copper based electric contact material is now used in the compound electric contact material for low voltage electric equipment: oxides of rare earth element are added into the copper based electric contact material after the addition of oxides of rare earth elements the copper-based electric contact metrical possesses more excellent resistance to melting loss of eclectic arc, melting-welding resistance and the electric contact disconnection ability surpasses that of silver alloy electric contact material and non-silver copper based electric contact material now widely used on disconnector and ensure to disconnect the electric current successfully when current overload accidents such as short impact occur in the current. A layer of welding material may be compounded to the base of the compound electric contact, to ensure the welding quality. 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.