Isolation device for voltage transformer cabinet

A busbar-side voltage transformer cabinet, comprising:

• a busbar chamber including a busbar;
• an inflation chamber;
• a voltage transformer;
• and
• an isolation device installed in the inflation chamber and connected to the voltage transformer, the isolation device including:
• a drive shaft, rotatably installed to the inflation chamber;
• a conductive ring, sleeved and fixed to the drive shaft;
• a movable guide rod, fixed to the drive shaft and the conductive ring to swing along with a rotation of the drive shaft and electrically connected with the conductive ring;
• a fixing post, fixedly connected to the voltage transformer;
• a contact, installed to the fixing post through a compression spring and electrically connected with the fixing post, and keeping in electrical contact with the conductive ring under an action of the compression spring;
• a busbar bushing, connected to the busbar and extending from the busbar chamber into the inflation chamber;
• a closing stationary contact, fixed to the busbar bushing;
• and
• a grounded stationary contact, fixed to a grounding circuit,
• wherein, the rotation of the drive shaft drives the movable guide rod to swing between an on position and a grounded position, in the on position, the movable guide rod contacts and conducts with the closing stationary contact, and the voltage transformer is in an on state;
• in the grounded position, the movable guide rod contacts and conducts with the grounded stationary contact, and the voltage transformer is in the grounded state.

A feeder-side voltage transformer cabinet, comprising:

• an inflation chamber;
• a voltage transformer;
• and
• an isolation device installed in the inflation chamber and connected to the voltage transformer, the isolation device including:
• a drive shaft, rotatably installed to the inflation chamber;
• a conductive ring, sleeved and fixed to the drive shaft;
• a movable guide rod, fixed to the drive shaft and the conductive ring to swing along with a rotation of the drive shaft and electrically connected with the conductive ring;
• a fixing post, fixedly connected to the voltage transformer;
• a contact, installed to the fixing post through a compression spring and electrically connected with the fixing post, and keeping in electrical contact with the conductive ring under an action of the compression spring;
• a feeder bushing, connected to a feeder and extending into the inflation chamber;
• a closing stationary contact, fixed to the feeder bushing;
• and
• a grounded stationary contact, fixed to a grounding circuit,
• wherein, the rotation of the drive shaft drives the movable guide rod to swing between an on position and a grounded position, in the on position, the movable guide rod contacts and conducts with the closing stationary contact, and the voltage transformer is in an on state;
• in the grounded position, the movable guide rod contacts and conducts with the grounded stationary contact, and the voltage transformer is in the grounded state.