Large pump synchronous motor is the cooperative product with Japan. According to standard of Japanese Toshiba corporation, polecoil is manufactured strictly.
泵用同步电动机是与日本合作产品，磁极线圈完全按照日本东芝公司设计图纸加工。
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The paper introduces a type of the turn-to-turn insulation test equipment including an impulse-voltage generator and a peak voltmeter for the electrical machine polecoil.