Eaton Corporation

Eaton Intelligent Power Limited

Other

Westinghouse Electric Corporation

David Glenn Loucks

Todd Matthew Lathrop

Rune Lennart Jonsson

Robert K London

Robert William Johnson, Jr

Steven Andrew Dimino

Robert Yanniello

Ian Wallace

Timothy Hedquist

Santosh Kumar Sharma

Denis A Mueller

Daniel Edward Hrncir

Deborah Kaltwasser Mort

Eddie Wilkie

Bert Popovich

Yogesh Rajwade

Prasad Arvind Venikar

Alec Dane Burkle

Sneha Abhyankar

Robert Thomas Wolfe

Amresh Kumar

Ragini Jain

John Charles Merrison

Gurmeet Singh

Rajasekhar Navara

Santosh Kr Sharma

Swetha Prakash

Voltage samples are collected for a source and loads connected thereto by an electrical network. Respective negative sequence voltage difference values are generated for respective source/load pairs from the voltage sample. A connection (e.g., a loose connection) in the electrical network is identified based on the generated negative sequence voltage difference values. The identified connection is reported to a user. Identifying a connection in the electrical network may include identifying at least one source/load pair having an associated negative sequence voltage difference value that meets a predetermined criterion and identifying the connection based on the identified at least one source/load pair. Identifying the connection may include identifying at least one source/load pair having an associated negative sequence voltage difference value with a magnitude falling outside of at least one range associated with the at least one source/load pair.

Apparatus, methods and computer-readable media for detection of loose connections in an electrical assembly

A control system includes: a controller configured to: access an estimated torque and estimated speed of a motor mechanically coupled to an impeller of a centrifugal machine; access at least one set of pre-determined performance data values associated with a known speed of the impeller, where each set of pre-determined performance data values includes: a plurality of flowrate values and a plurality of performance metric values; determine an operating point of the centrifugal machine based on the estimated torque, the estimated speed, and the at least one set of pre-determined performance data values; compare the determined operating point to a best efficiency point (BEP) associated with the centrifugal machine; and determine whether to change the speed of the motor based on the comparison.

Control system for a fluid management system

A system for locating a ground fault in an HRG power distribution system includes an HRG pulsing system having a ground fault sensor to detect a ground fault, a pulsing contactor to introduce a pulsing current into the power distribution system, and a controller to control the pulsing contactor to introduce the pulsing current into the power distribution system in response to a ground fault detection by the ground fault sensor. Current sensors in the power distribution system monitor three-phase current signals on conductors of the power distribution system, with the current sensors positioned on distribution networks in the power distribution system and at a protection device included on each respective distribution network. A processor associated with each protection device and operably connected to the current sensors thereat receives signals from the current sensors for identifying a location of a ground fault in the power distribution system.

System and method for automatic high resistance ground pulse activation and detection

An improved bus bar apparatus is usable in high temperature electrical terminations and is configured to provide sufficient heat dissipation such that when connected at one end with a 90&#xb0; C. wire, the bus bar apparatus is at most only at 75&#xb0; C. at another end thereof, which end can be connected with a lower temperature electrical component such as a circuit interrupter. The bus bars apparatus may include bus bars that extend directly between the high temperature wires and the low temperature electrical component, or the bus bar apparatus may additionally include wires that are electrically interposed between the low temperature region of the bus bars and the electrical component. Additional cooling could be provided by employing oversized wires. The bus bars may additionally include fins, fans, or supplementary heat sinks to enhance thermal convection of the bus bar. The bus bar apparatus additionally can be provided with its own enclosure to be usable in a retrofit situation.

Bus bar apparatus usable in high-temperature cable termination applications

A system for providing backup power to a facility includes a generator and a controller. The controller is configured to operate the generator until a condition is met, determine a load history that occurs while operating the generator until the condition is met, determine a cool-down time based on the determined load history, and run the generator to the point when the condition is met and in an unloaded condition for the cool-down time.

Active engine cool down time delay for automatic transfer switch controllers

A system for providing backup power to a facility includes a generator, and a controller configured to determine whether electrical power to the facility has been interrupted, determine a mode of operation based on a type of occupancy currently within the facility, and if electrical power has been interrupted, then operate the generator based on the determined mode.

Method and apparatus to change generator start delay and runtime following outage

A system for providing backup power to a facility includes a generator, and a controller configured to determine whether electrical power to the facility has been interrupted, and automatically determine a generator initial start and restart time delay based at least on a prediction of when an electrical system within the facility needs to be cycled.

Method and apparatus to optimize generator start delay and runtime following outage

Bus bar apparatus usable in high temperature cable termination applications

Changes in equipment cooling performance may be detected by indirectly measuring cooling performance by way of a cooling efficiency indicator. An operating cooling efficiency indicator is calculated as a ratio between equipment electrical power consumption and a temperature differential between the equipment and an ambient temperature. The operating cooling efficiency indicator is compared to a baseline cooling efficiency indicator to detect changes in cooling performance.

Electrical device cooling efficiency monitoring

A loss of a power source for a bus is detected. Responsive to detecting the loss of the power source, a voltage is generated on the bus using an uninterruptible power supply (UPS). A generator is transitioned to a desired output state concurrent with generating the voltage on the bus using the UPS. The generator is coupled to the bus responsive to the generator attaining the desired output state. The UPS may be used to provide power to a load connected to the bus while the generator is in transition. For example, detecting the loss of the power source may be preceded by operating a converter of the UPS coupled to the bus as a rectifier and generating the voltage on the bus using the UPS may include operating the converter of the UPS as an inverter.

Power systems and methods using an uniterruptible power supply to transition to generator-powered operation

A power generation system includes a generator configured to be connected to a bus. The system also includes a timing reference signal generator circuit configured to detect a timing variation of a voltage on the bus and to generate a timing reference signal from a timing reference other than the voltage on the bus in response to detection of the variation. The system further includes a generator control circuit configured to synchronize operation of the generator to the timing reference signal.

Generator systems and methods using timing reference signal to control generator synchronization

A power system includes a load bus configured to be connected to a power source, a generator and an uninterruptible power supply (UPS). The generator is operated as an induction generator to provide power to the load bus while providing reactive power to the load bus from the UPS. In some embodiments, prior to operating the generator as an induction generator, the generator is operated as an induction motor while the load bus is receiving power from the power source. Responsive to loss of the power source, the UPS may be used to maintain operation of the generator as an induction motor while the prime mover accelerates up to a speed sufficient to drive the generator as an induction generator.

Power systems and methods using an induction generator in cooperation with an uninterruptible power supply

The difference in voltages measured upstream and downstream of a pressure junction in a power distribution system produced by the energizing power is divided by the measured current to calculate a value that is a function of the impedance of the pressure junction, which is monitored for deterioration. To eliminate noise resulting from dividing a small number by a large number and transients in the power distribution system, the impedance is calculated from the squares of the voltage differences and currents for a large number of samples, and the change between successive calculations is limited to produce a stable median value.

Method and apparatus for measuring impedance across pressure joints in a power distribution system

An electric contactor for the motor of a reciprocating pump such as an oil well walking beam pump, and other cyclic loads, uses the power drawn by the load to determine the phase angle of the pump without the need for a separate phase signalling sensor. The contactor couples the electric pump motor to a power line, and has a power sensor and peak detector. The power sensor can be responsive to RMS AC power or simply to current amplitude and polarity. The motor passes through a minimum power at the extreme top and bottom of a pump stroke, and the phase position at the top of the stroke is preferably detected by sensing for the power reversal that occurs as the momentum of the pump causes regeneration by the motor. The contactor can have overcurrent and/or undervoltage protection features, can include contacts for rearranging the motor windings to vary pump operation, and can report the phase to a pump control and monitoring system, whereby process variables are assessed as a function of phase.

Rod pump beam position determination from motor power

The extent to which a reciprocating pump for an oil well fills between successive pump strokes is determined indirectly from variations in the power consumption of an electric motor driving the pump. The power consumption is sampled numerically and a processor determines the phase of data in the samples from phase references defined by a peak and/or zero crossing in the cyclic operation of the pump and motor. When the pump fills incompletely between strokes, for example when the pump is operated at too high a frequency, the well rod moves against decreased resistance during the downstroke. The processor determines the point in the pump cycle at which the well rod encounters fluid from the increased power consumption, obtaining an indirect indication of fillage. The instantaneous power consumption preferably is measured by a module associated with an electrical contactor or motor starter included in an improved pump controller or 'pump panel' that includes a programmable controller effecting the processor functions and also functioning as an off-pump control for regulating activation of the pump.

Growing community of inventors

Coraopolis, PA, United States of America

David Glenn Loucks