Abstract: A method to control a mixer includes an input to a control and command unit including a plurality of input data correlated to a formulation of a mix, a detection step to detect the values of an electric quantity characteristic of the electric power line of a drive unit in the mixer, a processing step where data is processed to calculate the overall active power, and to carry out verifications, comparing the data processed with one or more of the respective data introduced among the input data, in order to transmit to a controller that commands the mixer, a consent signal to discharge the mix or an anomaly signal.

Abstract: An improved PCB Rogowski coil addresses the challenges presented by space constraints within circuit interrupters. The disclosed coil comprises a plurality of PCBs that are coupled together, in contrast with known coils constructed from only a single PCB. During a pre-assembly stage, three PCBs are coupled to one another in order to form a partial coil assembly structured to be mounted onto a circuit interrupter primary conductor. After the partial coil assembly is mounted onto the primary conductor, a fourth PCB is connected to the partial coil assembly via press-fit connectors to form a complete coil. In contrast with known PCB Rogowski coils which are structured to be mounted perpendicularly to the primary conductor, the disclosed modular PCB Rogowski coil enables a substantial portion of the PCB surface area to be mounted in parallel to the primary conductor and to thus occupy significantly less space than known PCB Rogowski coils.

Abstract: The embodiments described herein describe technologies of dynamic random access memory (DRAM) components for high-performance, high-capacity registered memory modules, such as registered dual in-line memory modules (RDIMMs). One DRAM component may include a set of memory cells and steering logic. The steering logic may include a first data interface and a second data interface. The first and second data interfaces are selectively coupled to a controller component in a first mode and the first data interface is selectively coupled to the controller component in a second mode and the second data interface is selectively coupled to a second DRAM component in the second mode.

Abstract: Embodiments of the present disclosure may monitor and adjust a sampling rate of an ADC for converting the power signal to a digital signal, locking onto the phase and frequency of the power signal. This technique may make the sampling process coherent relative to the power signal. Properties of the power signal, such as phase, frequency, and magnitude, may be extracted relative to an idealized power signal.

Abstract: A mains DC power supply comprising a buffer amplifier, in which a battery is used to provide a reference voltage for the buffer amplifier. The battery voltage reference is disconnected from the buffer amplifier, to prevent excessive dissipation of the battery, when the mains AC supply is in the switched-off state. The use of a battery voltage reference produces a DC power supply, from the mains AC supply, with an ultra-low level of subsonic and audio frequency noise.

Abstract: A near-field communication device operates to transmit data by near-field communications techniques to another device. The near-field communication device includes a memory that stores a message to be transmitted in an ASCII format. The message is retrieved from the memory and transmitted using the near-field communications techniques in an ASCII format.

Abstract: Systems and a method are provided. A system includes a set of power loss detecting and reporting apparatuses. Each of the power loss detecting and reporting apparatuses includes a power loss detection circuit for detecting a local power loss. Each of the power loss detecting and reporting apparatuses further includes a cellular transmitter for transmitting (i) a preloaded code indicative of a power loss location and (ii) a time stamped alarm, to a remote designee entity using a cellular network, responsive to a detection of the power loss. The set of apparatuses collectively provide an outage pattern and sequence for a plurality of supplied locations based on the preloaded code and the time stamped alarm.

Abstract: According to one aspect, a system configured to provide equivalent measurement values is provided. The measurement equivalency component is configured to receive, from a component, data requesting at least one measurement value meeting at least one criterion, the at least one measurement value having at least one first measurement type, determine that the at least one measurement value is not stored within at least one memory, determine that at least one stored measurement value meeting the at least one criterion and having at least one second measurement type different from the at least one first measurement type is stored within the at least one memory, and provide data descriptive of at least one equivalent measurement value based on the at least one stored measurement value to the component in response to receipt of the data requesting the at least one measurement value.

Abstract: The present disclosure relates to a tangible, non-transitory, machine-readable medium, having machine-readable instructions to pair a water detection device of a plurality of water detection devices with a user account via a user device, receive a first signal indicative of a location of the water detection device from the user device, receive a second signal indicative of a personalized message to be sent to the user device upon a detection event of the water detection device, and display a list of the plurality of water detection devices and corresponding locations of each water detection device of the plurality of water detection devices on the user device.

Abstract: A device for detecting alternating-current components iAC of an electric current iACDC flowing in a direct-current circuit includes an inductor arranged in the direct-current circuit, and an AC path arranged electrically in parallel with the inductor, wherein the AC path comprises a series circuit made up of a capacitor and a primary winding of a transformer. The device further includes a voltage measuring device, wherein a secondary winding of the transformer is connected to the voltage measuring device via a low-pass filter circuit.

Abstract: A monitoring system includes a centralized generation and control system of an electrical grid operator. A distributed generator integration device connects a distributed generator to the electrical grid, and automatically initiates machine-to-machine communications with the distributed generator to: gather specification and performance data, control the distributed generator, and automatically add and configure the distributed generator to the centralized generation control of the monitoring system.

Abstract: An electrical phase (e.g., a phase from among three-phase power) connected to an electrical meter may be determined. In one example of the techniques, changes in energy or power (e.g., a derivative or differences) may be determined based at least in part on measurements from each of a plurality of meters. Changes in energy or power may be determined based at least in part on electrical transmissions measured at each of the phases of a feeder. A meter may be selected from among the plurality of meters. For each of the plurality of electrical phases, the changes in energy or power measured by the meter may be compared or correlated to the changes in energy or power measured at the feeder. A phase that is connected to the meter may be determined, from among the plurality of electrical phases, based at least in part on the comparisons or correlations.

Abstract: An apparatus for electrical current measurement. The apparatus may include a power input such as a current transformer that can be magnetically coupled to a line being measured. The apparatus may also include an energy harvesting circuit to parasitically harvest energy from the current transformer and an energy metering circuit to measure the current on the line. A controller can control the switching of a dynamic switch between an energy harvesting mode and an energy metering mode. The apparatus may also include a wireless transceiver. A plurality of these apparatuses may be combined into a network of devices to relay information from multiple current meters to a data concentrator and ultimately the Internet.

Abstract: An integrated circuit includes at least one cell. The at least one cell includes a cell region defined by a cell boundary; a power line structure extending in a first direction parallel to and along the cell boundary and including a first power line extending in the first direction along the cell boundary, a plurality of metal islands spaced apart from one another over the first power line in the first direction, and a second power line extending in the first direction over the plurality of metal islands; and a signal line structure disposed in the cell region at the same level as the first power line and the plurality of metal islands. Separation distances between each of the plurality of metal islands and a part of the signal line structure at the same level as the plurality of metal islands are equal to or greater than a critical separation distance.

Abstract: Embodiments are directed to automatically controlling network and service quality across datacenters. In one scenario, a computer system identifies portions of work that are to be performed within the datacenter. The computer system creates a request for change (request) in a change management system, where the change management system is configured to store and manage the implementation of requests within the datacenter. Then, upon implementation of the created request, the computer system polls the status of the request to determine whether the portions of work identified in the request can now be performed and, upon determining that the portions of work identified in the request can be performed, the computer system performs the portions of work according to the request. Performance of the specified work according to a request allows for workflows to be controlled based on the request.

Abstract: A circuit for multiplying a digital signal by a variable gain, controlled in dependence on a digital gain control value. The circuit comprises: a multiplier input for receiving the digital signal; a multiplier output for outputting the digital signal multiplied by the gain; a plurality of multiplier stages each arranged to multiply by a respective predetermined multiplication factor; and switching circuitry arranged so as to apply selected ones of the multiplier stages in a multiplication path between the input and output, in dependence on the digital gain control value. The multiplication factors are arranged such that binary steps in the digital gain control value result in logarithmic steps in said gain.

Abstract: The present disclosure provides systems and methods for identifying changes in and failures of a reference voltage of an analog to digital (A/D) converter. A non-scalar function of the reference voltage of the A/D converter can be determined and output to the A/D converter. The A/D converter is configured to output a digital value to the A/D conversion system, wherein the digital value corresponds to the non-scalar function of the reference voltage. The A/D conversion system decodes the non-scalar function of the reference voltage with a corresponding inverse function, and may determine the drift factor associated with the reference voltage. The A/D conversion system can report a change in, or a failure of, the A/D converter or its reference voltage, and can operate or prevent operation of protection elements.

Abstract: In one respect, there is provided a method for analog-to-digital conversion. The method may include: receiving, at an analog-to-digital converter, an analog signal; determining, based on a total distortion caused by at least a sampler and an encoder, a sampling rate below the Nyquist rate and/or a quantization rate; and converting, by the analog-to-digital converter, the received analog signal to a digital signal by at least sampling at the determined sampling rate, when operation at the determined sampling rate does not worsen the total distortion. Related systems and articles of manufacture are also disclosed.

Abstract: A device to measure power consumption includes a processor connected to a central processing unit (CPU) and a memory module, a switch for setting the power measurement device to measure either the power supplied to the CPU or the power supplied to the memory, and a display to show the results of such measurements.

Abstract: An ECU detects a steering angle that is an absolute angle based on a sine signal and a cosine signal that are output from a steering sensor. The ECU includes a three-phase pulse generator that generates, based on the sine signal and the cosine signal, three-phase pulse signals that have edges corresponding to predetermined rotational angles and that are set in such a manner that the predetermined rotational angles corresponding to the respective edges do not overlap each other and are at regular intervals. A microcomputer has a function as a second rotational angle detector that calculates a steering angle based on the pulse signals.

Abstract: A digital multimeter provides information regarding measurements shown on a display of the multimeter, and available functions of the multimeter. The information typically relates to a current context of the multimeter. The context may include a current mode or other setting of the multimeter.

Abstract: A digital multimeter automatically records measurements of electrical or physical parameters. The multimeter may record the measurements based on events such as the passage of time, fluctuations or deviations in the measurements, or user inputs. In some examples, the digital multimeter operates at a reduced power setting during automatic recording operations.

Abstract: A system and method for measuring reactive power which uses a pair of quadrate carriers to add a 90 degree phase shift to a voltage path or a current path in a power meter. The quadrate carriers have the same frequency but are offset in phase from each other by 90 degrees.

Abstract: A digital multimeter includes an auto-save component configured to automatically capture and save a sequence of measurements. The auto-save component detects when a measurement becomes stable and upon determining that the measurement has become stable, captures and saves the measurement in a memory of the digital multimeter. The multimeter may additionally include an auto-naming component for automatically assigning a name to each measurement in the sequence, and an auto-hold component for temporarily freezing the display of the stable measurements in the multimeter.

Abstract: An ammeter is provided with a plurality of individual wound coils interconnected in a generally U-shaped array to measure the magnitude of current in a conductor extending through a sensing region inside the U-shape. Additional pairs of position-sensing coils determine the position of the conductor relative to the sensing region and provide outputs to circuitry which permits the magnitude measurement to be displayed only if the conductor extends through the sensing region.

Abstract: A digital multimeter displays a miniature version of a live actual reading of the multimeter. The miniature version typically appears after a larger version of the live actual reading is displaced by other display elements. The miniature version of the live actual reading may be accompanied by a warning icon or other graphical symbol to alert a user of a potentially hazardous electrical condition.

Abstract: A power measurement and calibration system provides power and line frequency measurements by using a bandpass filter having complex voltage and current outputs from which real and imaginary power components can be determined. Calibration of the filter may be omitted if a complex wavelet filter is used to implement the bandpass filter and a determination of line frequency can also be provided for downstream use. A processor receiving data from the output of the filter can compute real and imaginary power, power factor and the line frequency. The filter may be implemented by a processor executing program instructions, or a digital circuit implementing the filter and optionally a CORDIC rotator for computing the current-to-voltage phase relationship can provide input to the processor for power measurement and calibration of the sample rate to line frequency relationship and for other uses.

Abstract: A digital multimeter comprises a rotary switch and a rotary switch memory. The rotary switch can be moved between a plurality of positions to change the function performed by the digital multimeter. When the rotary switch is in a particular position, a user can change the function currently associated with that position from a default function to a non-default function. Thereafter, when the user moves the rotary switch away from the particular and then subsequently moves the position back to the particular position, the multimeter resumes the non-default function without requiring further user-input.

Abstract: A meter device for measuring electrical energy is provided. The meter device includes circuitry for measuring at least one parameter of electrical energy provided to the meter device. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer (CT) and at least one external potential transformer (PT) that operates on the electrical energy provided to the meter device. At least one processor is provided for processing the at least one calibration factor for adjusting the measuring for compensating for the errors when measuring the at least one parameter of electrical energy.

Abstract: Apparatus and methods for providing a voltage signal indicative of the voltage being supplied by each phase of a multiphase voltage being supplied to a load. For each phase, a phase to neutral voltage is produced by providing a virtual ground. For each phase, a phase to phase voltage is produced by determining a difference between a pair of phase to neutral voltages. Either the phase to neutral voltages or the phase to phase voltages for each phase are output depending on the configuration of the multiphase voltage being supplied to the load.

Abstract: A method of state estimation is provided, including: (a) acquiring a plurality of positive sequence voltage and current phasor measurements; (b) designating a reference positive sequence voltage phasor measurement from the acquired phasor measurements; (c) correcting the acquired phasor measurements to account for the reference phasor measurement; (d) calculating complex power having a real component and an imaginary component, using the corrected positive sequence voltage and current phasor measurement; (e) using the real component of said complex power as a calculated mega-watt and the imaginary component of the complex power as a calculated mega-volt-ampere; and (f) using the mega-watt and mega volt-ampere calculations in a state estimation algorithm.

Abstract: An electrical meter is provided that includes a cover configured for securement onto a base. The meter includes features that resist meter tampering, and features that provide evidence of meter tampering.

Abstract: An arrangement includes an A/D converter and a processing circuit. The A/D converter is configured to generate digital samples of voltage and current waveforms in a polyphase electrical system. The processing circuit is operably coupled to receive the digital samples from the A/D converter. The processing circuit is further configured to combine a value substantially equal to two times the magnitude of the phase A current sample with the phase C current sample to generate a first value, and generate a VA calculation using the first value and at least one other value. The processing circuit is further configured to provide information representative of the VA calculation to one of a group consisting of a display, a communication circuit, and a billing calculation unit.

Abstract: A voltmeter/phaser includes dual hot-stick probes, each carrying a housing including a digital display, one of the housings also having a measurement circuit for measuring the sensed voltage. A plural-conductor cable interconnects the housings and carries, in two separate conductors, current between the probes and display data between the display circuits, so that identical voltage values are always displayed on the two displays.

Abstract: A digital multimeter having improved recording functionality is disclosed. The digital multimeter disclosed incorporates a rotary switch, a series of keys and buttons, and a digital display so as to provide highly integrated, programmable and configurable features. Several of these features, either taken alone or in combination, provide significant improvements in ease of use, speed of user operation, and safety associated with use of the instrument.

Abstract: A meter device for measuring electrical energy is provided. The meter device includes circuitry for measuring at least one parameter of electrical energy provided to the meter device. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer (CT) and at least one external potential transformer (PT) that operates on the electrical energy provided to the meter device. At least one processor is provided for processing the at least one calibration factor for adjusting the measuring for compensating for the errors when measuring the at least one parameter of electrical energy.

Abstract: A digital multimeter with a rotary switch having a plurality of positions, each of the positions corresponding to a primary measurement function to be performed. An LCD displays secondary functions or modes corresponding to the positions of the rotary switch and values determined by performing one of the measurement functions. The multimeter includes default functions for each position of the rotary switch that may be changed to other functions or modes. When the other functions or modes are set in a first position, the rotary switch is moved to a second position, and returned to the first position the multimeter restores the functions and/or modes set when the rotary switch was previously in the first position.

Abstract: An energy consumption meter includes a first input for providing a first input signal derived from a voltage, a first analog-to-digital (A/D) converter electrically connected to the first input to generate a first output signal based on the first input signal, a second input for providing a second input signal derived from a current, a second A/D converter electrically connected to the second input to generate a second output signal based on the second input signal, a multiplier to combine signals corresponding to the first and second output signals, and a phase evaluation block having two inputs that are electrically connected to the first input and to the second input. The phase evaluation block measures a phase difference that corresponds to a phase difference between the first input signal and the second input signal. A phase correction block corrects for the phase difference in one of the first output signal and the second output signal.

Abstract: An apparatus for measuring average power consumption of a computer system includes a current to voltage converter for receiving an operating current of the computer system and transforming the operating current into a voltage signal; an analog-digital converter connected to the current to voltage converter for receiving the voltage signal, and converting the voltage signal into a digital signal indicating a value of the operating current; a micro controller unit connected to the analog-digital converter for receiving the digital signal, and calculating a value of the average power consumption of the computer system during a determined period of time, the value of the average power consumption being converted into a display-driving signal; and a display module connected to the micro controller unit for receiving the display-driving signal, and displaying the value of the average power consumption.

Abstract: A test switch is provided having front and rear sides. The test switch includes a base to which a plurality of switch units are mounted. A row of upper terminals are removably mounted to the base, above the switch units, and a row of lower terminals are removably mounted to the base below the switch units. The upper and lower terminals are adapted for connection to wiring from the front side of the test switch. Upper and lower covers are releasably attached to the base and extend across the rows of upper and lower terminals, respectively.

Abstract: An integrated circuit is provided with a distributed supply voltage monitoring system in which a single controller controls a plurality of voltage monitors located in respective modules of the integrated circuit. The controller and each circuit form a successive approximation analogue to digital converter Such a system enables a small size monitoring circuit to be realized for every module of the integrated circuit.

Abstract: A three-phase monitoring system for detecting and dynamically correcting wiring errors in an electrical circuit. The system includes a voltage divider circuit and a current transformer circuit connected to three voltage channels and three current channels, respectively. Samples of the voltages and currents are held in respective sample and hold circuits, which are provided to an analog multiplexer. The analog multiplexer is controlled by a processor, and is coupled to gain and filter circuitry, sample and hold circuitry, and to an analog-to-digital converter (ADC). The ADC is connected to the processor, which analyzes the power factor for a given voltage/current pair. If the power factor is outside of an expected range, the processor dynamically changes the addresses assigned to the channels such that the data arrives in the processor in an expected sequence.

Abstract: The present invention is a meter for recording voltage and current on a transformer. The device has a housing with a body portion and a lever portion, the lever portion being movable between a closed position wherein the lever portion abuts the body portion and an open position wherein the lever portion is positioned away from the body portion. The device includes a pair of current sensors each current sensor being divided into two corresponding sensor fractions with one fraction of each sensor formed on the body portion of the housing and the other corresponding fraction formed on the lever portion of the housing. The fractions of each sensors are constructed such that each of the current sensors have a central opening dimensioned to receive one of the transformer terminals when the lever portion of the housing is in its first position. The current sensors are positioned on the housing such that the meter can be mounted to the terminals of the transformer.

Abstract: A single-phase, 3-wire watthour meter which can measure power consumption, alter a contract capacity, control the stop/start of power supply/distribution, and easily update programs from a higher-level control apparatus by providing a central processing unit, a storing means, a communicating means and various interfaces, can measure, for example, every 0.2 sec, a currents (ia and ib) running through 100V T-phase and R-phase, voltages (v1 and v2) between T-N and between R-N and a current (i3) and a voltage (v3) under a 200V load, determine a 100V power consumption by W100=(ia?i3)·v1+(ib?i3)·v2 and a 200V power consumption by W200=i3·v3, and measure the detailed behavior of a power consumption by totaling a power consumption every 30 min, interlocks with a gas leakage detector and a fire alarm, can control the opening/closing of rain doors and shutters and the operation/stop of Internet home electric appliances, and enables low-cost communication by means of dynamic IP Address-based communication.

Abstract: A method for stabling a voltage, a pulse frequency modulating circuit and a power supply using the same are provided. The method includes the following steps. First, a comparing signal is provided. Then, set the comparing signal to be a first logic state when the voltage to be stabilized is lower than a preset voltage. Next provide a pulse signal when the comparing signal is set in the first logic state. Afterwards, adjust the enable time of the pulse signal based on the number of times of logic state changing of the comparing signal within a preset period and, adjust the voltage according to the enable time of the pulse signal.

Abstract: An energy measurement system including a radio frequency (“RF”) device powered by a solar panel. The RF device comprising a wireless communication port operative to transmit and receive communication over a wireless network of additional RF devices. The energy measurement system able to transmit energy parameters of the RF device over the wireless network.

Abstract: The data storage and processing resources required for an electric meter are reduced by basing the selection and application of phase error correction on a root mean square load current flowing through the meter.

Abstract: A method of making and using an extended test switch starting with a previously existing un-extended test switch that is ready for connection to electrical devices to be tested. A housing selected from one or more available housings each having a predetermined length is connected to a modified un-extended test switch. Each housing has a rear wall that has several inwardly and outwardly facing terminals. At least one of the rear facing terminals of the un-extended test switch is connected to an associated one of the inwardly facing terminals of the housing. After manufacture the extended test switch can be mounted in a suitable receptacle for connection to at least one electrical device. One or more of the switches on the front of the un-extended test switch to be left in an operational condition with a clear cover attached to the front of the test switch.

Abstract: A system for managing collection of data and remote operation of fielded remote units is disclosed. The remote units may be incorporated in automatic meter reading systems, capacitor bank switching systems, power line fault detection units, power recloser units, surveillance systems, railroad switch heaters, or any of a multitude of systems wherein widely scattered devices require monitoring and/or operational commands. Each remote unit is provided with a CELLEMETRY™ transceiver, allowing the unit to receive commands from and pass data to a data center via the cellular control channel network and the Internet. The data center is organized to provide data related to a particular service to an associated customer user via the Internet, the customer users being utility companies, railroad companies, surveillance companies, and the like.

Abstract: A system and method for dynamically lock the sample rate of an analog to digital (ADC) converter to an input frequency. Specifically, a system for measuring power is disclosed. The system includes an ADC converter, a measuring module, an ADC cycle counter, and a calculation block coupled together. The ADC converter samples an analog input line signal. The measuring module measures a predetermined number of line cycles of the analog input line signal. The ADC cycle counter measures an actual sample count of the analog input line signal by the ADC converter over the predetermined number of line cycles. The calculation block determines an error rate between the actual sample count and an ideal sample count that is based on a predetermined over sample rate.