Abstract: An insulated accelerometer assembly is provided for attachment to a vibrated component. A base has a portion for engagement and connection with the vibrated component and to transmit vibration. An accelerometer senses vibration and is located at least partially within the base. A housing at least partially encloses the accelerometer and inhibits voltage discharge, corona damage, and voltage tracking on the accelerometer. The housing is made of an insulating material and has an interior for the accelerometer. The housing has a plurality of raised fins on the exterior. A mounting cap also inhibits voltage discharge, corona damage, and voltage tracking and secures the housing. The mounting cap is made of insulating material and has an exterior that includes a plurality of raised fins. A cable has an electrically conductive wire and has a shield to inhibit electrical noise.

Abstract: A smart capacitor includes a main capacitor having at least one intelligence mechanism selected from a prognostics mechanism and a high speed protection mechanism integrated within the main capacitor. The at least one intelligence mechanism and the main capacitor are together configured to generate at least one type of output signal selected from long term induced failure mechanism signals and sudden capacitor failure condition signals in response to desired input signals.

Abstract: A method of monitoring a capacitor bank comprising a plurality of capacitor strings connected in parallel, each capacitor string comprising a plurality of capacitors connected in series is provided. The method includes energizing the capacitor bank. The method includes determining dissipation factors of each of the plurality of the capacitor strings. The method further includes comparing each of the determined dissipation factors with an expected dissipation factor and estimating a health state of the plurality of the capacitor strings based, at least in part, on the comparison of the determined and expected dissipation factors.

Abstract: A current transformer is provided. The current transformer comprises a magnetic core having a central opening, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the magnetic core, one or more coils disposed on the magnetic core along a magnetic neutral axis of the magnetic core and one or more coils disposed on the magnetic core along a reference axis, wherein the reference axis is substantially perpendicular to the magnetic neutral axis.

Abstract: A current transformer is provided. The current transformer comprises an inner magnetic core having a central opening, an outer sense core circumscribing the inner magnetic core, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the inner magnetic core, and one or more coils disposed on the inner magnetic core, the outer sense core, or both, in a magnetically balanced configuration relative to a magnetic neutral axis of the inner magnetic core.

Abstract: A current transformer comprises a magnetic core having a closed central opening, at least two conductors extending through the central opening and positioned symmetrically within the magnetic core, and at least one set of winding turns wound around the core in a balanced configuration with respect to the at least two conductors.

Abstract: A winding diagnostic system is provided. The system includes a core having a winding to generate a magnetic flux. A retention device for holding the winding in place is provided. The system further includes a sensor disposed in a sensing relation with the retention device to generate signals related to at least one aspect of the winding.

Abstract: A smart capacitor includes a main capacitor having at least one intelligence mechanism selected from a prognostics mechanism and a high speed protection mechanism integrated within the main capacitor. The at least one intelligence mechanism and the main capacitor are together configured to generate at least one type of output signal selected from long term induced failure mechanism signals and sudden capacitor failure condition signals in response to desired input signals.

Abstract: A circuit interrupter for interrupting current on a line conductor is provided. The circuit interrupter includes separable contacts, a trip mechanism, a bimetal, a microprocessor, a series arc detection sequence, a low-pass filter circuit, and a high-pass filter circuit. The trip mechanism selectively opens the separable contacts when activated. The series arc detection sequence is resident on the microprocessor and includes a plurality of series fault detection algorithms. The low-pass filter circuit provides a low-pass signal to the series arc detection sequence. The high-pass filter circuit provides a high-pass signal to the series arc detection sequence. The sequence selects a particular algorithm from the plurality of algorithms based on the low-pass signal. The sequence calculates a plurality of statistical features from the high-pass signal and sends an output signal to activate the trip mechanism based on a comparison of the plurality of statistical features to the particular algorithm.

Abstract: A current transformer comprises a magnetic core having a closed central opening, at least two conductors extending through the central opening and positioned symmetrically within the magnetic core, and at least one set of winding turns wound around the core in a balanced configuration with respect to the at least two conductors.

Abstract: A winding diagnostic system is provided. The system includes a core having a winding to generate a magnetic flux. A retention device for holding the winding in place is provided. The system further includes a sensor disposed in a sensing relation with the retention device to generate signals related to at least one aspect of the winding.

Abstract: An insulated accelerometer assembly is provided for attachment to a vibrated component. A base has a portion for engagement and connection with the vibrated component and to transmit vibration. An accelerometer senses vibration and is located at least partially within the base. A housing at least partially encloses the accelerometer and inhibits voltage discharge, corona damage, and voltage tracking on the accelerometer. The housing is made of an insulating material and has an interior for the accelerometer. The housing has a plurality of raised fins on the exterior. A mounting cap also inhibits voltage discharge, corona damage, and voltage tracking and secures the housing. The mounting cap is made of insulating material and has an exterior that includes a plurality of raised fins. A cable has an electrically conductive wire and has a shield to inhibit electrical noise.

Abstract: A high-frequency, high-voltage electron switch includes an electron source, a steering mechanism, a mask or anode plate, and a target. The electron source produces a beam of electrons with a voltage of at least about 1 kV that impinges upon the anode plate. The steering mechanism scans the electron beam across the anode plate at a scanning frequency of at least about 10 MHz. A hole or aperture is provided in the anode plate that allows the electron beam to pass through and produce a pulsed, high-voltage current in the target with a very high-frequency repetition rate and a very fast rise time. The pulsed, high-voltage current produced in the target can be used to cause a high-voltage source to turn on and off.

Abstract: A circuit interrupter for interrupting current on a line conductor is provided. The circuit interrupter includes separable contacts, a trip mechanism, a bimetal, a microprocessor, a series arc detection sequence, a low-pass filter circuit, and a high-pass filter circuit. The trip mechanism selectively opens the separable contacts when activated. The series arc detection sequence is resident on the microprocessor and includes a plurality of series fault detection algorithms. The low-pass filter circuit provides a low-pass signal to the series arc detection sequence. The high-pass filter circuit provides a high-pass signal to the series arc detection sequence. The sequence selects a particular algorithm from the plurality of algorithms based on the low-pass signal. The sequence calculates a plurality of statistical features from the high-pass signal and sends an output signal to activate the trip mechanism based on a comparison of the plurality of statistical features to the particular algorithm.

Abstract: A circuit interrupter for interrupting current on a line conductor is provided. The circuit interrupter includes separable contacts, a trip mechanism, a bimetal, a microprocessor, a series arc detection sequence, a low-pass filter circuit, and a high-pass filter circuit. The trip mechanism selectively opens the separable contacts when activated. The series arc detection sequence is resident on the microprocessor and includes a plurality of series fault detection algorithms. The low-pass filter circuit provides a low-pass signal to the series arc detection sequence. The high-pass filter circuit provides a high-pass signal to the series arc detection sequence. The sequence selects a particular algorithm from the plurality of algorithms based on the low-pass signal. The sequence calculates a plurality of statistical features from the high-pass signal and sends an output signal to activate the trip mechanism based on a comparison of the plurality of statistical features to the particular algorithm.

Abstract: A high-frequency, high-voltage electron switch includes an electron source, a steering mechanism, a mask or anode plate, and a target. The electron source produces a beam of electrons with a voltage of at least about 1 kV that impinges upon the anode plate. The steering mechanism scans the electron beam across the anode plate at a scanning frequency of at least about 10 MHz. A hole or aperture is provided in the anode plate that allows the electron beam to pass through and produce a pulsed, high-voltage current in the target with a very high-frequency repetition rate and a very fast rise time. The pulsed, high-voltage current produced in the target can be used to cause a high-voltage source to turn on and off.

Abstract: A method of detecting a series arc in an alternating current electrical system is provided. The method is a pattern-recognition based approach and includes passing raw current signals from a conductor in the electrical system through one or more filters to provide a filtered signal; extracting one or more features from the filtered signal; and classifying the features to a known state representative of the series arc.

Abstract: A circuit interrupter for interrupting current on a line conductor is provided. The circuit interrupter includes separable contacts, a trip mechanism, a bimetal, a microprocessor, a series arc detection sequence, a low-pass filter circuit, and a high-pass filter circuit. The trip mechanism selectively opens the separable contacts when activated. The series arc detection sequence is resident on the microprocessor and includes a plurality of series fault detection algorithms. The low-pass filter circuit provides a low-pass signal to the series arc detection sequence. The high-pass filter circuit provides a high-pass signal to the series arc detection sequence. The sequence selects a particular algorithm from the plurality of algorithms based on the low-pass signal. The sequence calculates a plurality of statistical features from the high-pass signal and sends an output signal to activate the trip mechanism based on a comparison of the plurality of statistical features to the particular algorithm.

Abstract: Insulation condition monitoring systems and methods for a rotating DC electric machine, the method comprising: measuring a first set of values for an instantaneous differential current and an instantaneous voltage during operation of the rotating DC electric machine; calculating a value for a phasor current and phasor voltage based upon the first set of values of the instantaneous differential current and the instantaneous voltage, respectively; calculating an angular relationship between the phasor current and the phasor voltage; and determining insulation condition based on the angular relationship.

Abstract: A method for making a dynamoelectric machine conductor bar, compromises providing a plurality of bundled together spiraling strand conductors having surrounding insulation to define a substantially rectangular shape with the strand conductors and strand insulation defining an opposing conductor bar end portion having an electrically insulated gap between the strand insulation adjacent the bar end portion; and applying a filler material to fill the gap to electrically shield the conductor bar end portion and to a greater than 0.080 to about 1.5 inch continuous outer radius surface end portion.