guichao news: "copper aluminum battle" is expected to be a winner "section with aluminum copper" will be a big trend
in cable copper raw materials prices, a sharp fall in the number of cable production enterprise profit margins of today, the same as the prices of raw materials is far lower than the copper cable, so "to the aluminum section copper" hot topic has been noisy, so new aluminum cable performance will meet the requirements?
here, in order to more mature and popular on the market of copper clad aluminum power cables and electrical equipment with wire and cable as an example.
a) dc resistivity, resistivity of copper clad aluminum wire is bigger than pure copper wire, which is about 1.5 times that of pure copper wire resistance value being the same (cross-sectional area is bigger than copper), copper clad aluminum wire weight of about 1/2 of pure copper wire. according to the calculation of skin effect, in more than 50 mhz frequency, compared with the same cross section of copper conductors, its resistivity is equal. in use of 50 hz frequency power cable ?