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HIGH TEMPERATURE ALKALI METAL RESISTANT INSULATION.
WESTINGHOUSE ELECTRIC CORP LIMA OH AEROSPACE ELECTRICAL DIV
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The experimental work was done to determine the effects of a combined environment on electrical conductors, ceramic insulators, potting compounds, and magnetic materials. The test environment combined 600 C saturated potassium vapor and electrical and fluctuating magnetic fields. The test devices were transformers fabricated from materials that had resistance to the corrosive action of saturated K vapor at elevated temperatures. Materials were exposed to 600 C and 850 C saturated K. Corrosion data were obtained. Materials to fabricate test transformers were selected by evaluating the K corrosion information. Two types of electrical terminal seals resistant to 600 C K vapor were developed. The electrical properties of these terminal seals in saturated K vapor at 600 C were determined. The seals were used to fabricate suitable K vapor test capsules for the test transformers. Transformers were fabricated and electrically tested in 300 and 600 C saturated K vapor. The test data obtained at a given elevated temperature in vacuum or Ar were compared with identical temperature points in saturated K vapor. Author
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