Method for estimating the initial welding current of closed high-current contacts under pulsed heating
Naganawa Toshio1, Pavleino M. A.1, Pavleino O. M.1, Safonov M. S.1
1Faculty of Physics, St. Petersburg State University, Peterhof, St. Petersburg, Russia

A study of the softening process of contact spots of closed high-current copper contacts caused by recrystallization of the material during short-circuit shock currents has been carried out. An original method has been developed for calculating the magnitude of the pulse current, which initiates the welding of contacts, which does not require preliminary experimental measurements. Keywords: Electrical contact, pulse heating, numerical calculation, welding.
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