Gas-insulated switchgear

A gas-insulated switchgear configured by connecting a plurality of units each including a plurality of devices accommodated in a tank in which insulating gas is enclosed, wherein

• in at least one of a connection points between the units and between the devices, a connection structure connected with a power cable for connection with another unit or another device is installed outside the tank on both sides sandwiching a connection point between the units or a connection point between the devices,
• the connection structure includes:
• a cap configured to close an opening of the tank, the cap having a disk shape;
• and
• a plug fixed to an outer surface of the cap, the outer surface facing in a direction opposite to the tank,
• the cap includes:
• a cap conductor connected to a center conductor in the tank;
• and
• a cap solid insulator surrounding an outer peripheral side of the cap conductor,
• the plug includes:
• a plug solid insulator having a cylindrical shape;
• and
• a plug conductor configured to close an end portion of the plug solid insulator on a side contacted to the cap, the plug conductor being in contact with the cap conductor, ;
• and
• an adapter installed on an outer peripheral portion of the plug solid insulator,
• in the plug conductor, a plug hole communicating with a cylinder-inside in the plug solid insulator is formed,
• in the adapter, a through hole extending in an axial direction of a center axis of the plug is formed,
• into the plug, a power cable passing through the plug solid insulator is inserted, and
• a core wire of the power cable is inserted into the plug hole,
• the tank includes a flange on an end surface,
• the cap is fixed to the flange with a first bolt and a nut, and
• the plug is fixed to the cap with a second bolt screwed from outside the tank via the through hole to a non-through screw hole formed on the outer surface.