Waukesha Electric Systems, Inc.

General Signal Corporation

Other

Spx Transformer Solutions, Inc.

Waukesha Electrical Systems, Inc.

Prolec-ge Waukesha, Inc.

Thomas M Golner

Shirish P Mehta

Jeffrey J Nemec

Peter C Michel

Padma Prabodh Varanasi

Robert H Turpin

Martin H Fox

Edward Pleva

Dharam Vir

Jeffery J Nemec

H Jin Sim

Thomas Wanke

Paul E Parker

William R Aschenbrenner

Shirsh Mehta

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.

High-voltage switch for series/parallel applications and tap changer applications

A method of making a dry type insulation is provided. The method includes combining a base fiber having a first outer surface with a binder material wherein the base fiber has a first melting point and the binder material has a second melting point which is different from the first melting point, heating the base fiber and binder material to a temperature above the second melting point, but below the first melting point using a double-belt press to form a resultant dry type insulation, compressing the base fiber and binder material using the double-belt press to form the resultant dry type insulation and cooling the resultant dry type insulation using the double-belt press.

Method of manufacturing a dry type electrical insulation

A power transformer is provided that includes a first transformer component, a second transformer component; and an electrical insulator. The electrical insulator is disposed between the first transformer component and the second transformer component. The electrical insulator includes a first layer and a second layer. The first layer has a binder fiber. The binder fiber is a staple fiber coated with a binder material. The second layer has an uncoated staple fiber. The first layer and the second layer are bound together with the binder material.

Insulation for power transformers

A dry type electrical insulation is provided. The insulation includes a base fiber having an outer surface and a first melting point and a binder material, coated onto the outer surface of the base fiber, having a second melting point. In this insulation, the second melting point is lower than the first melting point. A dry type insulation matrix is also provided. The insulation matrix includes a plurality of composite fibers having a base fiber having a first melting point and a binder material co-extruded therewith, having a second melting point. In this insulation matrix, the second melting point is lower than the first.

Dry type electrical insulation

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.

Solid insulation for fluid-filled transformer and method of fabrication thereof

A dehydrator breather is provided that includes automatic purging of accumulated moisture by detecting absorbed moisture in the breather, and closing an intake air channel, while opening an exit moisture channel. Adjustment of a default time-based purging cycle is adjusted to account for fluctuations in the detected moisture. An external communication capability is provided to enable off-site monitoring of the breather or the tank the breather is attached to.

Automatic dehydrating breather apparatus and method

A gas remover apparatus suitable for electrical substation high-voltage transformer load tap changers and similar oil-filled equipment removes potentially hazardous and destructive gases from the air-filled volume above the insulating oil bath in which the load tap changer electrical contacts are immersed. The apparatus applies a continuous supply of nitrogen to the load tap changer, and has an orifice to maintain a slight overpressure over an extreme range of climatic conditions. The substantially continuous venting of nitrogen entrains and expels contaminants such as oxygen, water, and potentially explosive breakdown products from the oil, all of which can degrade the performance of the load tap changer.

Gas remover apparatus and method

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.

Sensor and method for detecting electric contact degradation

A dehydrator breather is provided that includes a vessel, a desiccant container, a valve housing coupled to the vessel, and a vent assembly coupled to the valve housing. The vent assembly includes screened ports disposed along a vertical axis of the vent assembly body that allow air to enter and exit the dehydrator breather. The vent assembly, along with a filter placed between a desiccant container and the valve housing, individually and jointly, prevent desiccant that escapes the desiccant container from clogging the valve assembly.

Dehydrating breather apparatus and method

An apparatus for controlling the temperature of a core of a transformer is provided that includes a core, a shield surrounding the core, a cast formed between the core and the shield, and tubing positioned on the shield. The cast directs heat from the core to the shield and cooling fluid is directed through the tubing to cool the shield.

Apparatus and method for controlling the temperature of the core of a super-conducting transformer

A method and apparatus for connecting high voltage leads to a super-conducting transformer is provided that includes a first super-conducting coil set, a second super-conducting coil set, and a third super-conducting coil set. The first, second and third super-conducting coil sets are connected via an insulated interconnect system that includes insulated conductors and insulated connectors that are utilized to connect the first, second, and third super-conducting coil sets to the high voltage leads.

Method and apparatus for connecting high voltage leads to a high temperature super-conducting transformer

A system that controls nitrogen pressure in the ullage of a power transformer that has its windings submerged in oil. The pressure is controlled in a narrow range of approximately 0.5 psi to approximately 2.0 psi. A nitrogen generator supplies the nitrogen to a reservoir from which it is distributed to the ullage as well as to accessories such as a load tap changer or a control box. A temperature regulator is provided for substation installations that are located in climates with wide ambient temperature variations to control the pressure of the generated nitrogen in an acceptable range.

Method and system for controlling the supply of nitrogen to electrical power handling equipment

An oil sampling system for an electrical power device in which the oil flows through the sampling device in a closed loop with the oil containing apparatus of the electrical power device. Oil is taken in from an active region near the top of the oil containing apparatus and returned to a lower region thereof. This assures that the oil sample is representative of the oil in the system. For the case of a power transformer, the oil flow is by cooling with gravity assistance. For the case of a pumped system, such as a load tap changer, the oil flow is forced. The sampling procedure begins with connecting the sampling device in the closed loop. Oil is then passed through the sampling device until bubble free. The sampling device is then removed for analysis. The procedure does not need a flush operation or a flush container.

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Pewaukee, WI, United States of America

Thomas M Golner