Abstract
According to studies, the successful operation of a power switch of the circuit breaker contact depends on the quality of the ingredients. If these studies show that a contact is ideal contact with features such as high electrical conductivity, high thermal conductivity, lack of adhesion between surfaces, electrical sparks and corrosion resistance, resistance to environmental factors, good mechanical properties in order to meet The high strength, high melting point, low vapor pressure, low cost, long life and easy production. Whereas the conventional alloys with large mesh are not the characteristics required for such contacts, the various metallurgical methods should be provided the desired alloy. Costs of production, a broad survey of the alloy was performed. The results show that the use of Nano scale metal powders, all the properties required for high power switches to provide an incredible boost. In order to achieve this study are examples of alloys W-Cu is made under various metallurgical and electrical tests were high and the results showed the correctness of the theory Tungsten-copper has unique material properties. A high level of temperature resistance is one of the most important advantages of tungsten, while the copper content increases the electrical and thermal conductivity. Show the relationship between geometric characteristics of the melt bead and the optical-acoustic emissions from arc flash during melting in the switching process. The paper summarizes results of measurements of remelting area geometry, thermal efficiency and melting efficiency. Superior properties of the present powder are due to the homogeneous mixing state of Nano sized W and Cu particles in powder. This experiment was using Nano-contacts made of Nano copper and Nano-tungsten from 2010 to 2015, in circuit breakers of two substation electric power transmission in Tehran (Iran), has been done and The Nano contact on the whole worked very well and the scheme was by and large a success.
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