VACUUM CAPACITOR TYPE INSTRUMENT TRANSFORMER

To provide a compact capacitor type instrument transformer that shields electromagnetic force and enables high-precision measurement.SOLUTION: A capacitor type instrument transformer includes a vacuum capacitor 2 that constitutes a main capacitor (or a part of the main capacitor) and a pressure dividing capacitor, and due to the pressure division of the vacuum capacitor 2 and the pressure dividing capacitor, the configuration is such that desired voltage measurement can be performed. In the vacuum capacitor 2, an insulating cylinder opening 4a on one side in an axial direction of the insulating cylinder 4 is closed by a high-pressure portion 5, and an insulating cylinder opening 4b on the other side in the axial direction is closed by a grounding portion 6 to configure a vacuum vessel 20. A pressure division portion 8 is insulatedly supported at a position of the grounding portion 6 inside the vacuum vessel 20 facing the high-pressure portion 5 via a cylindrical insulating support portion 7 extending in the axial direction. As a result, the high pressure portion 5, the grounding portion 6, and the pressure dividing portion 8 of the vacuum capacitor 2 are insulated from each other, and the outer peripheral side of the pressure dividing portion 8 is covered by the high-pressure portion 5 and the grounding portion 6.SELECTED DRAWING: Figure 2 【課題】電磁力を遮蔽して高精度の測定が可能な小型のコンデンサ形計器用変圧器を提供する。【解決手段】主コンデンサ（または、主コンデンサの一部）を構成する真空コンデンサ２と、分圧コンデンサと、を備え、当該真空コンデンサ２および分圧コンデンサの分圧により、所望の電圧計測を行うことが可能な構成とする。真空コンデンサ２においては、絶縁筒４における軸心方向の一方側の絶縁筒開口部４ａを高圧部５により閉塞し、当該軸心方向の他方側の絶縁筒開口部４ｂを接地部６により閉塞して、真空容器２０を構成する。接地部６における真空容器２０内側で高圧部５と対向する位置には、前記軸心方向に延在した筒状の絶縁性支持部７を介して、分圧部８を絶縁支持する。これにより、真空コンデンサ２の高圧部５，接地部６，分圧部８がそれぞれ互いに絶縁され、当該分圧部８の外周側が当該高圧部５および接地部６により覆われた状態となる。【選択図】図２