Abstract: The system for mitigating an overspeeding condition of a turbine engine can include a sensor for measuring an actual speed of a gas generator turbine of the turbine engine and a processor for deriving a delta, the delta being a comparison between the actual speed of the gas generator turbine and a predicted gas generator turbine speed. The system is configured for detecting the overspeeding condition when delta is higher than a predetermined threshold. A method of detecting an overspeeding condition during operation of a turbine engine can include measuring an actual speed of a gas generator turbine, then evaluating a delta between the actual speed of the gas generator turbine and a predicted speed of the gas generator turbine, then comparing the delta to a threshold value.

Abstract: The system for mitigating an overspeeding condition of a turbine engine can include a sensor for measuring an actual speed of a gas generator turbine of the turbine engine and a processor for deriving a delta, the delta being a comparison between the actual speed of the gas generator turbine and a predicted gas generator turbine speed. The system is configured for detecting the overspeeding condition when delta is higher than a predetermined threshold. A method of detecting an overspeeding condition during operation of a turbine engine can include measuring an actual speed of a gas generator turbine, then evaluating a delta between the actual speed of the gas generator turbine and a predicted speed of the gas generator turbine, then comparing the delta to a threshold value.

Abstract: Disclosed is a method of making an insulated conductor by coating a conductor with a triazole and applying the insulation over the triazole coating. The triazole is preferably benzyltriazole or tolyltriazole. It can be applied dissolving the triazole in water, immersing the conductor in the solution and evaporating the water. The invention is particularly useful with epoxy powder coatings on copper conductors which are used in perchloroethylene containing insulating fluid.

Abstract: A static plate and liquid distribution manifold construction for vertical coils of electrical inductive apparatus, characterized by a plurality of vertically stacked pancake coils, manifold means comprising an inner rigid core of dielectric material, a coating of metal foil on the core, and a flexible bladder enclosing the rigid core and metal foil structure above the plurality of stacked coils, a plurality of radially spaced spacers between the coils and between the top coil and the manifold means, pressure means for compressing the assembly of the manifold means, the spacers, and the coils, an inlet means for introducing a coolant into the manifold bladder whereby the coolant fluid after leaving the manifold is fed by gravity downwardly over the several stacked coils.

Abstract: A water collector for vapor-cooled electrical apparatus which is hermetically sealed to the atmosphere. The flow of vapor through the water collector is generated by the condensation of the vapor into a liquid and is continuous during operation of the apparatus. A storage chamber may be sized to contain all of the water collected during the lifetime of the apparatus or the water may be periodically eliminated from the system.

Abstract: Electrical inductive apparatus including an electrically insulated electrical winding, an insulating dielectric surrounding the winding, and an insulating member associated with the winding which projects into the insulating dielectric. The insulating member includes a solid adhesive binder, and a filler of microspheres. The binder and microspheres are selected such that the dielectric constant of the insulating member is less than about 3.5 times the dielectric constant of the insulating dielectric.

Abstract: Overpressure protection for a vaporization cooled electrical inductive apparatus. A pressure responsive device is actuated by a predetermined pressure within a sealed housing and de-energizes a pump, thereby stopping the flow of dielectric fluid to the heat producing members which prevents further pressure increases within a tank due to continued vaporization of the dielectric fluid. In one embodiment, a discharge valve is actuated by the pressure responsive device to drain the dielectric fluid from the windings to prevent further pressure increases caused by continued vaporization of the dielectric fluid. A fusible link is provided to disconnect the windings of the electrical inductive apparatus from a source of electrical potential subsequent to the de-energization of the pump. In another embodiment, the pressure responsive device actuates the circuit breaker which disconnects the windings of the electrical inductive apparatus from the source of electrical potential.

Abstract: A relay which measures sudden increases in the pressure of gas located above the fluid dielectric in electrical apparatus. The relay includes defeating apparatus which prevents the operation of the sudden pressure relay when the sudden increase in gas pressure is caused by abrupt changes in the fluid level due to physical disturbances outside the apparatus enclosure. One arrangement includes a switch which is activated, when a float on the surface of the dielectric fluid is raised sufficiently, to prevent energization of the sudden pressure relay. Another arrangement uses two sudden pressure relays which are located at diagonally opposite corners of the apparatus tank and are serially connected so that both relays must be activated at the same time to energize the associated control or alarm circuits. Other arrangements use baffles and multiple opening tubes to prevent false activation of the sudden pressure relay by keeping the fluid away from the gas opening of the sudden pressure relay.

Abstract: A cast bushing having a capacitor structure which includes concentrically positioned capacitor sections. Each capacitor section includes a spacing member which helps to maintain the distance between the conducting portions of the capacitor sections during the casting process. The spacing members consist of a tapered cylindrical non-conductive mesh around which another mesh member and a conductive foil are positioned. The diameter of the smaller opening of the tapered mesh permits the insertion of a similarly constructed but smaller diameter capacitor section inside the tapered mesh to form concentric capacitor sections. The rigidity of the tapered portion of the mesh maintains the desired distance between the conducting foils of the two concentric capacitor sections. Two-piece mandrel assemblies are used to construct each capacitor section.