Electricity: electrical systems and devices – Safety and protection of systems and devices – Transformer protection
Patent
1975-10-16
1977-11-15
Broome, Harold
Electricity: electrical systems and devices
Safety and protection of systems and devices
Transformer protection
335 6, H02H 704
Patent
active
040588424
ABSTRACT:
An assembly of control handles for attachment to a distribution transformer containing a secondary circuit breaker. The assembly includes a stop plate which is located against the outside of the transformer tank. An operating handle and an overload control handle are positioned 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 opeating 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 oveload 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.
REFERENCES:
patent: 3176107 (1965-03-01), Temple
patent: 3983454 (1976-09-01), Cotton et al.
Broome Harold
Lackey D. R.
Westinghouse Electric Corporation
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