Abstract: A switch includes an insulating base having an upper surface and an assembly having a mounting surface. The assembly configured to be arranged on the insulating base, the assembly having a lower surface, the assembly being configured to be arranged on the upper surface of the insulating base with an open space between the lower surface of the assembly and the upper surface of the insulating base. The switch further includes a plurality of fixed contact units mounted in an aligned arrangement on the mounting surface of the assembly and a movable contactor mounted to move within the bore of the insulating body and the electrical contacts of the plurality of fixed contact units.

Abstract: A system and a process for detecting oil quality includes a light source configured to generate light within an oil container and a sensor configured to detect light from the light source after it has traversed through the oil in the oil container and generate an output signal. The system and process further includes a monitor configured to receive the output signal from the sensor and determine an oil quality of an oil in the oil container.

Abstract: A system and a process for detecting oil quality includes a light source configured to generate light within an oil container and a sensor configured to detect light from the light source after it has traversed through the oil in the oil container and generate an output signal. The system and process further includes a monitor configured to receive the output signal from the sensor and determine an oil quality of an oil in the oil container.

Abstract: An insulation system for a fluid-filled power transformer that allows for operation of the transformer at higher temperatures and with lowered susceptibility to aging. The insulation system includes a plurality of fibers that are bound together by a solid binding agent. The solid binding agent may, for example, for sheaths around the fibers or may be in the form of dispersed particles that bind the fibers to each other. Also, a method of fabricating such an insulation system.

Abstract: An insulation system for a fluid-filled power transformer that allows for operation of the transformer at higher temperatures and with lowered susceptibility to aging. The insulation system includes a plurality of fibers that are bound together by a solid binding agent. The solid binding agent may, for example, for sheaths around the fibers or may be in the form of dispersed particles that bind the fibers to each other. Also, a method of fabricating such an insulation system.

Abstract: A dielectric material that includes an epoxy matrix and a high-voltage dielectric insulating fluid. The epoxy matrix includes a porosity of at least 20% by volume and at least 90% of the porosity is in the matrix is accessible to the insulating fluid. Also, a method of forming a dielectric material with such high porosity and impregnability by an insulating fluid.

Abstract: A probe cell monitors conditions within electrical power transmission and switchgear apparatus to detect degradation of stressed components. The probe cell is a hardware simulation of components of a specific unit of electrical power apparatus, including electrodes between which an electric field gradient is established. The probe cell electrodes accumulate contamination at a rate related to accumulation rate on components of working apparatus. In a typical embodiment, a probe cell installed within an enclosure shares the insulating, hydrocarbon-based immersion fluid of the apparatus. Because the probe cell can be invasively tested and results recorded as often as desired without deenergizing the actual apparatus, degradation of the apparatus can be predicted with high confidence, avoiding unnecessary maintenance as well as unexpected catastrophic failure. Potential reduction in unproductive preventive maintenance while avoiding emergency repairs can offset probe cell cost.