High voltage externally-separable bushing

A bushing, having an elongated conductor substantially encased in insulating material, which extends in sealing relationship through an aperture in a sealed enclosure encasing an electrical apparatus, comprising:

• said conductor having two parts, a first generally cylindrical rod part which is fixed at its proximal end to the electrical apparatus and which extends therefrom toward the aperture, and a second sleeve part having a generally annular passage disposed to circumferentially engage the first rod part and thereby provide a conductive path therebetween;
• a one-piece insulator sealingly attached to and substantially encasing the sleeve part of the conductor;
• means for threadably connecting the two parts of the conductor such that connection and disconnection can be accomplished from outside the enclosure, thereby enabling disconnection of the sleeve part and the one-piece insulator from the electrical apparatus without dismantling the enclosure, said connecting means comprising a screw, a circumferential shoulder within the passage of the sleeve part of the conductor for seating a head of the screw, and a threaded bore in a distal end of the rod part of the conductor for receiving a threaded end of the screw;
• and
• means for sealing the junction of the two parts of the conductor so as to maintain the environment within the enclosure.