Symposium on operation of the boulder dam transmission line-general operation of transmission line

The successful operating experience had during the first 1?? years with the Boulder Dam-Los Angeles transmission lines of the Department of Water and Power is reviewed in a symposium of five papers. Two unusually severe winter seasons and two lightning seasons, one of which was largely during the construction period, have served to test the line, so that an accurate judgment of its future performance can be made. An historical summary of the use of the line during permanent installation and adjustment of auxiliary equipment and through the period of normal operation to the present time is presented. The manner in which the electrical and mechanical performance has proved the design in developed and the unforeseen problems requiring solution are described. In addition to this general discussion, the excellent performance of the conductor from the standpoint of corona, the outstanding freedom from lightning flashover, are shown in two separate papers. Two additional papers describe the carrier-current supervisory and communication systems and the relay protection system as well as fully discussing the experience had in placing this equipment in adjustment and having successful operation.