Abstract
The design considerations for the use of high alumina in spacers for spacer cable are discussed. The spacer configuration is a function of the characteristics of the insulation materials involved?both the spacer and the phase conductor covering. Electrical considerations dictate a minimum of material in the spacer consistent with mechanical requirements. A new equivalent circuit, coupled with a method for comparing the voltage division between a spacer and the phase conductor covering, permitted evaluation of new designs. Flashover tests for the latest spacer design are reported. Surface leakage test results show the relative merits of ceramic and fluorocarbon coatings in reducing leakage due to salt contamination. The tests in which bare phase wires were used are most revealing. A simple design for a contamination testing facility is included.
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