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POWER COMPANIES operating in areas subjected to air-borne contamination have, for many years, been faced with a difficult operating problem. Maintenance of satisfactory operation has required that insulators be cleaned periodically by hand wiping or periodic washing (energized or de-energized). Expensive overinsulation is frequently employed to alleviate partially the effects of surface contamination.
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Conner et al. (1958) studied this question.
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