Simple new resistance-type A-C load-flow board

NETWORKS of circuits are replacing the radial type in many places for transmitting and distributing electric power. One of the disadvantages of networking is the complexity of the problems to be solved to determine what changes or additions to a network should be made to obtain the desired operating characteristics at a minimum cost. The conventional type of a-c board has provided engineers with an accurate and speedy tool for the study of complex network problems. Now another type of a-c board using only resistance circuits and no generator or load units has been built by the Portland General Electric Company. It is operating successfully in solving complex network problems accurately and speedily.