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US 5,698,831 AGranted
Integrated electrical system
AssigneeLindsey Manufacturing Company
InventorsAbdelgawad Abdelgawad, Mun Seog Choi, Keith E. Lindsey, Steven D. Scholfield
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AssigneeLindsey Manufacturing Company
InventorsAbdelgawad Abdelgawad, Mun Seog Choi, Keith E. Lindsey, Steven D. Scholfield
Estimating the term…
An integrated electrical system includes a first conductor for receiving current from power lines or other equipment. The conductor is coupled to a conventional vacuum switch for controlling flow of current through the system. A current collector coupled to the vacuum switch collects current from the vacuum switch. A second conductor coupled to the current collector delivers current to equipment or lines externally of the device. The components of the system are housed within an inner epoxy encapsulated within Polysil. The epoxy preferably has temperature characteristics which are similar to that of Polysil to prevent cracking due to temperature stress. At least one sensor may also be provided integrally with the components for detecting faults or for sensing general power line conditions. A preferred voltage sensor has resistive shielding for accurate sensing in adverse environments.
An electrical switching system comprising:
A high voltage electrical switching system comprising:
A system for protecting an assembly of electrical components connected together for high voltage in a temperature range from about -40.degree. C. to about 80.degree. C., the system comprising a first insulating body of cured epoxy resin encapsulating the components, and a second insulating body of cured resin encapsulating the first body, the second body resin being selected from the group consisting of unsaturated polyester resin and methylmethacrylate and filled with between about 83% and about 87% by weight of inorganic particles, the first body including silica particles which cause the first body to have a thermal expansion gradient that substantially tracks a thermal expansion gradient of the second insulating body.
A system for protecting an assembly of electrical components connected together for high voltage in a temperature range from about -40.degree. C. to about 80.degree. C., the system comprising a first insulating body of cured epoxy resin encapsulating the components, the resin including microcrystalline silica particles and having a thermal expansion gradient between about 20 and about 30 micrometers per meter per .degree.C. at about -40.degree. C. and between about 38 and about 52 micrometers per meter per .degree.C. at about 80.degree. C.
Dependencies are inferred from the claim text.