Vacuum capacitor

A vacuum capacitor comprising:

• a vacuum container which accommodates a pair of electrodes which are capable of ensuring capacitance;
• and
• a vacuum expansion container which communicates with the vacuum container in series,
• wherein the vacuum container includes:
• a movable support part which supports one electrode of the pair of electrodes;
• one conductor which supports the movable support part to enable reciprocation in an axial direction of the vacuum container;
• an other conductor which supports an other electrode of the pair of electrodes;
• and
• a main bellows which is interposed between the movable support part and the one conductor,
• wherein the vacuum expansion container includes:
• a movable part arranged coaxially with the movable support part;
• and
• an adjustment bellows which is interposed between the movable part and an inner surface of an end portion of the vacuum expansion container,
• wherein the movable support part and the movable part are connected by an insulating connection rod arranged coaxially with the pair of electrodes,
• wherein the other conductor is formed with a through hole through which the insulating connection rod is inserted, and
• wherein the vacuum container and the vacuum expansion container communicate with each other via the through hole.