Isolation device for voltage transformer cabinet and voltage transformer cabinet

The utility model discloses an isolation device used for a voltage transformer cabinet, the isolation device is installed in an inflation chamber of the voltage transformer cabinet, the isolation device is configured to switch a voltage transformer between a connection state and a grounding state, and the isolation device comprises a driving shaft rotatably installed in the inflation chamber; the conducting ring is sleeved and fixed on the driving shaft; the movable guide rod is fixed to the driving shaft and the conducting ring so as to swing along with rotation of the driving shaft and is electrically connected with the conducting ring; the fixed column is fixedly connected to the voltage transformer; the contact piece is arranged on the fixed column through a pressure spring, is electrically connected with the fixed column, and is electrically contacted with the conductive ring under the action of the pressure spring; the switch-on static contact is fixed to the switch-on sleeve; and the grounding static c