Patent ID: 8304678

Claim:
A vacuum insulated switch-gear comprising: a fixed electrode and a movable electrode forming a main circuit of the switch-gear; a vacuum valve having a vacuum chamber and accommodating the main circuit; a bus bar electrically connected to the main circuit in the vacuum valve to supply the main circuit with electric power; and a cable electrically connected to the main circuit to supply the electric power to a load, wherein the vacuum insulated switch-gear is configured to be capable of being lifted up with a jack-up bolt to adjust a seated height of the vacuum insulated switch-gear, and which further is comprised of: a nut fixed at each corner of a base plate forming a bottom of the vacuum insulated switch-gear to screw the jack-up bolt through the nut, a height adjusting plate arranged under at least one of corners of the base plate between the base plate and a seating place on which the vacuum insulated switch-gear is seated, a hold-down bolt for fastening the base plate on the seating place through the height adjusting plate, and a base plate-side through hole provided at each corner of the base plate to allow the hole-down bolt to go therethrough, wherein the base-plate through hole is provided at the corner of the base plate together with the nut, and wherein the height adjusting plate is provided with a slit having a width larger than a diameter of the jack-up bolt together with a height adjusting plate-side through hole for the hold-down bolt so that the height adjusting plate can be avoided from interference of the jack-up bolt by the slit when the height adjusting plate is inserted between the base plate and the seating place.