Control assembly for power distribution transformers

H - Electricity – 02 – H

Patent

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317/7

H02H 7/04 (2006.01) H01H 71/50 (2006.01)

Patent

CA 1085908

CONTROL ASSEMBLY FOR POWER DISTRIBUTION TRANSFORMERS ABSTRACT OF THE DISCLOSURE An assembly of control handles for attachment to a distribution transformer containing a secondary circuit breaker, The assembly includes a stop plate which is lo- cated against the outside of the transformer tank. An operating handle and an overload control handle are posi- tioned for rotation between projections on the stop plate. The operating handle is attached to the outer portion of an operating shaft which extends through an opening in the stop plate. The operating shaft also extends through a sealed bearing which prevents leakage of the fluid dielectric contained within the transformer tank. The inner portion of the operating shaft is connected to an operating arm which is attached to the circuit breaker operating lever. The overload handle is attached to the outer portion of an overload shaft which extends through an opening in the stop plate and through a sealed bearing. The inner portion of the overload shaft is connected to an overload arm. The overload arm is attached to a remote control cable which runs to the circuit breaker and is attached to means on the circuit breaker for modifying the trip characteristics of the circuit breaker. The projections from the stop plate are symmetrical about an axis which extends through the openings in the stop plate.

262760

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