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The high-speed electric locomotives mica porcelain insulators, which comprises mica porcelain insulators and metal engagement member, metal engagement member includes upper and lower two separate pole on the pole in the ceramic body is surrounded by the inner end of the immediately outerthe terminal is provided at a diameter larger than the outer end of the cylindrical body is provided in the cylinder under the length of the tapered cylinder body, a hexagonal column shape provided in the bottom of the conical barrel cylinder. The inner end of the lower pole, and have three different diameters of the cylindrical structure. With a new design metal pole structure and high temperature mica porcelain insulator, insulator designed to overcome the traditional high temperature organic insulators, easy to aging, short life shortcomings fully meet the high-power special requirements of high-speed motor vehicle, its service life than existing products have grown significantly.