Publication: The Journal of Electricity
San Francisco, CA, United States
THE BURNING OF INSULATOR PINS.
BY W. STUART-SMITH.
Experience with high-tension lines in California has developed the fact that with voltages of 10,000 and over, the production of insulators that will not be punctured under the static strain, or that will not allow the current to soak through the body, is not the only requisite to maintenance of line. With potentials up to, and somewhat exceeding 5,000 volts, the protection of a sufficiently resisting insulator was all that was requisite, but when potentials of 10,000 volts had been in use for a year, it was