| 摘要 |
PROBLEM TO BE SOLVED: To enhance voltage measurement accuracy of a vacuum VT.SOLUTION: A transformer 1 for vacuum capacitor instrument (vacuum VT) comprises: an outer casing 5 formed by a primary insulation tube 2, a cylindrical part 3 and a ground cylindrical part 4; and a primary capacitor 6 provided in the outer casing 5. The primary capacitor 6 is formed by causing the side face of an internal primary electrode 8a provided on a primary end plate 8 to face the side faces of internal secondary electrodes 11a, 11b provided on a secondary end plate 11 each other. A molded portion 14 is formed by covering the primary insulation tube 2 with an insulation mold. Outer periphery of the molded portion 14 is covered with a metallic film 15. The ratio of lengths of the primary insulation tube 2 and the outer casing 5 is 1:2-1:10. |
