Abstract: An oil-immersed circuit breaker is provided having a mechanical/magnetic trip indicator. In a preferred embodiment, the trip indicator comprises a mechanical drive train (coupled to a conventional trip-sensing mechanism), a push piece, and an indicator piece. The drive train and the push piece are located inside the enclosure immersed in oil. The indicator piece is located outside the enclosure. The push piece is magnetically coupled to the indicator piece. Magnetic coupling eliminates problems encountered with prior art trip indicators associated with oil-seal leakage, electrical component failure, and power source failure.

Abstract: An oil-immersed circuit breaker is provided having a mechanical/magnetic trip indicator. In a preferred embodiment, the trip indicator comprises a mechanical drive train (coupled to a conventional trip-sensing mechanism), a push piece, and an indicator piece. The drive train and the push piece are located inside the enclosure immersed in oil. The indicator piece is located outside the enclosure. The push piece is magnetically coupled to the indicator piece. Magnetic coupling eliminates problems encountered with prior art trip indicators associated with oil-seal leakage, electrical component failure, and power source failure.

Abstract: A de-energized tap changer is disclosed that includes a contact rail assembly, a gear assembly, a handle assembly and a transmission system that compensates for angular misalignment of the gear assembly and handle assembly. The transmission system includes two elongated members with attached blocks that fit inside a hollow tube and when the handle of the de-energized tap changer is rotated, torque is transmitted through the transmission system to the gear assembly which drives the movable contacts.

Abstract: A clamp for mounting a drip tray to a transformer fuse holder has only two connecting members which are a first arm and a second arm. The first arm comprises a proximal end attached to the drip tray and a distal male end. The second arm comprises a proximal end attached to the drip tray and a distal female end. The male end comprises an insertion member, a male mating detent protruding from the insertion member, and a male locking detent protruding from the male end. The female end comprises a receiving member, a female mating detent protruding from the receiving member, and a female locking detent protruding from the receiving member. When the insertion member mates with the receiving member, the male mating detent and the female mating detent align, and the male locking detent and the female locking detent align such that the clamp becomes locked in three perpendicular directions.