Failure of disk insulators on high-tension transmission lines

THE writing of this article is prompted by the fact, brought out at several Institute meetings at which papers dealing with disk insulators were discussed, that although much successful research laboratory work has recently been done to determine the electrical and mechanical characteristics of insulators of this type, there is available practically no accurate information showing the actual operating performance of such insulators during a period of years. Having recently compiled certain information of this kind I take pleasure in making it available to the profession in the hope that those members who are engaged in the field of ceramic research may find it of interest and possibly of some assistance to them in their work, from which I hope will soon be developed a disk insulator possessing greater mechanical and electrical strength than any such insulator at present available.