Power supply for resistance-welding machines

OWING to the tremendous increase in the use of the resistance-welding process during the past several years, and the magnitude of many of the more recent installations, the problem of power supply for these operations has become one of primary importance to all concerned. Resistance-welding machines present an electrical load of intermittent character, high magnitude, and extremely poor load factor, and because of these poor inherent characteristics, the providing of adequate electric service, both from the standpoint of plant electrical distribution and the power system supply, involves special considerations and methods.