By Bella H. Chudnovsky
The revised version offers, extends, and updates a radical research of the criteria that reason and speed up the getting older of conductive and insulating fabrics of which transmission and distribution electric gear is made. New sections within the moment version summarize the problems of the getting older, reliability, and defense of electric gear, in addition to aiding gear within the box of producing renewable power (solar, wind, tide, and wave power). while uncovered to atmospheric corrosive gases and fluids, contaminants, low and high temperatures, vibrations, and different inner and exterior affects, those structures become worse; ultimately the power of the gear to operate appropriately is destroyed. within the sleek international of "green energy", the gear offering fresh, electricity should be effectively maintained for you to hinder untimely failure. The book’s objective is to assist locate the right kind how you can decelerate the getting older of electric gear, enhance its functionality, and expand the lifetime of energy iteration, transmission, and distribution equipment.
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Additional resources for Transmission, Distribution, and Renewable Energy Generation Power Equipment: Aging and Life Extension Techniques, Second Edition
Sample text
Important aspects with noble metals are a clean and smooth surface and a well-designed geometry. When corrosion is a concern, a pore-free layer should be provided over noble metal. 5 N is sufficient to make good contact on clean noble surface. However, for a good reliability the commonly required minimum of 1 N and redundancy of two parallel contacts is still a good recommendation, particularly when short interruptions are of concern. At longer term, the major concern with noble metal contacts is to avoid pore corrosion and keep the surface free from contamination.
5 N is sufficient to make good contact on clean noble surface. However, for a good reliability the commonly required minimum of 1 N and redundancy of two parallel contacts is still a good recommendation, particularly when short interruptions are of concern. At longer term, the major concern with noble metal contacts is to avoid pore corrosion and keep the surface free from contamination. It may be achieved by using pore-free underplating for gold plating [17]. With the gold price rising lately, the search of possible alternate plating for the applications where gold was usually applied was conducted in Ref.
An interesting study in Ref. [15] shows the correlation between the lifetime of electrical detachable contact and wear resistance of plating protecting the base metal of the contact from corrosion. Different criteria may be used to determine the lifetime of electrical contacts. Useful life of the contact comes to end when electrical resistance increases so much that excessive heat produced when the current is flowing through the contact area may result in thermal failure of the contact. The number of cycles resulting in the rapid increase of CR was used as lifetime, since it has the strongest impact on the behavior of electrical contacts.