Abstract: A bubble deflector for a vapor-cooled transformer comprises an insulating member, such as pressboard, which is placed under the upper yoke member of the transformer core to deflect vapor bubbles away from the bottom area of the upper yoke member of such core.

Abstract: Capacitively coupled, transient response improving, series capacitance compensating electrostatic shields in a disc-wound winding progress inwardly from the outer portion of said winding in a tapered configuration or inwardly and outwardly in a conical-taper configuration, as the winding progresses from a high potential end. With this arrangement a substantial reduction in the change in series capacitance is effected between the compensated and uncompensated portion of said winding which minimizes unsatisfactory voltage transient build-up at the beginning of the uncompensated or lower series capacitance portion of said winding.