Class / Patent application number | Description | Number of patent applications / Date published |
324074000 | TESTING AND CALIBRATING ELECTRIC METERS (E.G., WATT-HOUR METERS) | 21 |
20090243586 | Apparatus for testing a protective meausring or metering device as a constituent part of a high or medium voltage installation, more specifically of a utility protective relay, of a generator protective device, of a current meter, and so on, in a high or medium voltage installation - The subject matter of the invention is an apparatus for testing a protective, measuring or metering device as a constituent part of a high or medium voltage installation, more specifically of a utility protective relay, of a generator protective device, of a current meter and so on in a high or medium voltage installation, a combined terminal and pole block ( | 10-01-2009 |
20090322310 | Self-Calibration Circuit With Gyrated Output Impedance - Various embodiments of a self-calibration circuit may solve the problem that arises in high performance oscilloscopes and in particular, RF oscilloscopes, of internally providing a precision calibration signal without degrading the bandwidth, flatness of the frequency response, and input return loss of the oscilloscope. The self-calibration circuit may be configured to implement an impedance transformation technique where active and passive circuit elements with carefully chosen values are configured in an impedance converter. During self-calibration, switching elements comprised in the self-calibration circuit may be toggled to create a servo loop comprising an amplifier within the circuit, with an attenuator and resistive component acting as feedback elements. The circuit may hence become an impedance gyrator and behave as a precision source with an impedance matching the input impedance of the load circuit. | 12-31-2009 |
20110133721 | METHOD OF DIAGNOSING A MALFUNCTION IN AN ABNORMAL VOLTAGE DETECTING APPARATUS, SECONDARY BATTERY SYSTEM, AND HYBRID VEHICLE - The invention provides a method of diagnosing a malfunction in an abnormal voltage detecting apparatus, which includes breaking an electrical connection between a secondary battery ( | 06-09-2011 |
20110187345 | AUTOMATIC CALIBRATION CIRCUIT - Embodiments of circuits, devices, and methods related to calibration circuits are disclosed. In various embodiments, a calibration circuit may be used for calibrating a power detector circuit. In various other embodiments, a calibration circuit may be used for calibrating a resistor module. Other embodiments may also be described and claimed. | 08-04-2011 |
20110254536 | MEASUREMENT ARRANGEMENT HAVING A CALIBRATION SUBSTRATE AND ELECTRONIC CIRCUIT - A calibration substrate having at least one calibration standard with at least two electrical connection points, each for one measurement gate of a vector network analyzer. At least one electrical connection point is formed of at least one calibration standard having a switch, wherein the switch has a first electrical contact electrically connected to an electrical connection point of the calibration standard, a second electrical contact designed for electrically connecting to a measurement gate of the vector network analyzer, and a third electrical contact, wherein the switch is designed such that an electrical contact is established either between the first and third electrical contact or between the first and second electrical contact. | 10-20-2011 |
20110309820 | METHOD AND SYSTEM FOR INDICATING FAULTS IN AN ELECTRICITY METER - A method and system for determining a health of a metering system are provided. The metering system includes a meter base including a meter bus couplable between an electrical source and an electrical load, a plurality of sensors configured to determine electrical characteristics of electrical power in the meter bus, and a processor configured to execute at least one code segment. The code segments instruct the processor to determine revenue parameters for the metering system, determine at least one fault of a plurality of possible faults associated with the operation of the metering system using outputs from the plurality of sensors, the determination of the revenue parameters, and a processing fault generated by the processor, determine a severity level of each of the at least one faults, and determine a single value for a health of the metering system using the determined at least one fault. | 12-22-2011 |
20120001617 | APPARATUS FOR CALIBRATED NON-INVASIVE MEASUREMENT OF ELECTRICAL CURRENT - A system for accurate measurement and monitoring of AC or DC electrical current flowing through electrical conductors includes one or more current sensors, a receiver, and one or more calibration signal generators (“CSG's”) that can be plugged into outlets or otherwise coupled to the conductors so as to add automated, time-varying calibration signals to the conductors, such as current pulses or pulse patterns. The sensors are placed on a circuit breaker panel, around a cable, or otherwise near the conductors. The receiver distinguishes the calibration signals by their timing, pulse patterns, frequencies, or other time-varying features, uses their known amplitudes to calibrate the sensitivity of each sensor to each conductor, and determines the current flowing in each conductor. Among other applications, the invention can monitor building current usage, CO and data center power usage and distribution, and power line current leakage, and can calibrate invasive and/or non-invasive current sensors. | 01-05-2012 |
20120007580 | HIGH FREQUENCY POWER DETECTOR CIRCUIT AND RADIO COMMUNICATION DEVICE - A first envelope detector circuit and a second envelope detector circuit are the same in circuit configuration, where the former detects an input high frequency signal, and the latter generates a reference voltage for power level detection. A detector detects an output voltage of a selector configured to select an output of the first envelope detector circuit with reference to an output voltage of a selector configured to select an output of the second envelope detector circuit. A controller controls an input selector to determine and store control values for the two selectors during input of a high frequency reference signal generated by a high frequency reference signal generating unit, and controls the two selectors by using the stored control values when an actual high frequency signal is input. | 01-12-2012 |
20120098518 | DETECTION APPARATUS AND DETECTION SYSTEM - A detection apparatus ( | 04-26-2012 |
20120299574 | CALIBRATION APPARATUS FOR PROBES - An apparatus includes a connector and a connecting apparatus. The connector includes a first pin and a shell surrounding the first pin. The shell is insulated from the first pin. The connecting apparatus includes a main body, a second pin, and a third pin. The main body is connected to a bottom of the shell of the connector. First ends of the second and third pins extend through the main body, to be electrically connected to the first pin and the shell, respectively. Second ends of the second and third pins are exposed through a bottom of the main body. | 11-29-2012 |
20120299575 | LOAD REGULATION CIRCUIT AND LOAD REGULATION DEVICE EMPLOYING THE SAME - A load regulation circuit used for calibrating a voltage drop tester includes a voltage control switch, a first resistor group, a power control switch and a second resistor group electrically connected to the first resistor group through the power control switch. When the voltage control switch is switched on to different positions, the first resistor group provides different loads and load voltages for the voltage drop tester. When the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester. The load regulation circuit can simulate and replace different electronic device to calibrate the voltage drop tester. | 11-29-2012 |
20120313618 | Test Equipment Calibration - Calibrating test equipment may include: aligning timing of a first group of channels in the test equipment; aligning timing of a second group of channels in the test equipment, with the second group of channels being different from the first group of channels; determining a misalignment in timing between a first channel and a second channel, with the first channel being from the first group of channels, and the second channel being from the second group of channels; and compensating, for the misalignment, channels in at least one of the first group or the second group. | 12-13-2012 |
20120319674 | CALIBRATION OF NON-CONTACT CURRENT SENSORS - Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined current is injected through a voltage sensing conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode. The voltage sensing conductor is used to provide an indication of the magnitude and/or the phase of the electrostatic potential on the wire. The calibration current may be a DC current, and calibration may be performed while the conductor is carrying an AC current. | 12-20-2012 |
20120319675 | CALIBRATION OF NON-CONTACT VOLTAGE SENSORS - Calibration of a non-contact voltage sensor provides improved accuracy for measuring voltage on a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined voltage is imposed on a first voltage sensing conductor integrated in the non-contact voltage sensor, while a voltage on a second voltage sensing conductor is measured using a circuit of predetermined input impedance. The capacitance between the wire and each of the voltage sensing conductors may be the same, so that in measurement mode, when the first and second voltage sensing conductors are coupled together, the effective series capacitance provided in combination with the predetermined input impedance is four times as great. The results of the voltage measurement made in the calibration mode can thereby be used to adjust subsequent voltage measurements made in measurement mode with the first and second voltage sensing conductors combined in parallel. | 12-20-2012 |
20130088213 | CURRENT SWITCH WITH AUTOMATIC CALIBRATION - A current switch that can be reset when it is not powered automatically calibrates itself when the circuit monitored by the current switch is energized. | 04-11-2013 |
20130119972 | SYSTEM AND METHOD FOR MONITORING ELECTRICAL POWER USAGE IN AN ELECTRICAL POWER INFRASTRUCTURE OF A BUILDING - Some embodiments can concern a method of using an electrical sensor device. The method can include: determining a first current measurement of a first current in an electrical power infrastructure and a first phase angle measurement of the first current; determining that a first load is coupled to the electrical power infrastructure; while the first load is coupled to the electrical power infrastructure, determining a second current measurement of a second current in the electrical power infrastructure and a second phase angle measurement of the second current; and using a Kalman filter to determine one or more first calibration coefficients for the electrical sensor device at least in part using the first current measurement, the second current measurement, the first phase angle, and the second phase angle. Other embodiments are disclosed. | 05-16-2013 |
20130134961 | METHOD FOR PERFORMING POWER DETECTION, AND ASSOCIATED APPARATUS - An apparatus for performing power detection includes a squarer module and a calibration module that is coupled to the squarer module, where the squarer module includes a first squarer and a second squarer. The first squarer is arranged to convert an input signal of the squarer module into a first squarer output signal. In addition, the second squarer is arranged to output a second squarer output signal while a predetermined voltage level is input into an input terminal of the second squarer. Additionally, the calibration module is arranged to compare a difference between the first squarer output signal and the second squarer output signal with a reference signal to generate a comparison signal, and to compensate the difference according to the comparison signal, so as to perform a calibration on the apparatus. A method for performing power detection is also provided, and can be performed by utilizing the apparatus. | 05-30-2013 |
20130241529 | CALIBRATION OF NON-CONTACT CURRENT SENSORS - Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined DC current is injected through a conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode. | 09-19-2013 |
20150015232 | APPARATUS AND METHOD FOR MEASURING REAL TIME CLOCK ACCURACY IN AN ELECTRICITY METER - An arrangement for measuring an internal clock within an electricity meter includes an optical communication circuit within the meter, an optical detector external to the meter, and a frequency counter. The optical communication circuit within the electricity meter is operably coupled to receive a pulse output of the meter's internal clock, and is further configured to generate a corresponding optical pulse representative of the pulse output. The optical detector is configured to detect the pulse output via an optical port of the electricity meter. The frequency counter is operably coupled to receive from the optical detector a signal that is representative of the detected pulse output. | 01-15-2015 |
20150061636 | AUTOMATIC CALIBRATION METHOD FOR ACTIVE AND REACTIVE POWER MEASUREMENT - A system is provided for calibrating a device. The system includes a reference component, a sampling component, a calibration component, a comparing component and a proportional integral component. The reference component provides a reference power signal based on a voltage instruction and a current instruction. The sampling component samples a voltage signal to obtain a sampled voltage value and samples a current signal to obtain a sampled current value. The calibration component generates a calibrated power signal based on the sampled voltage value and the sampled current. The comparing component generates an error signal based on the reference power signal and the calibrated power signal. The proportional integral component and the calibration component are a feedback system that is operable to calibrate the gain of the sampled voltage and the sample current based on the error signal. | 03-05-2015 |
20160187449 | Energy Metering System and Method for its Calibration - An energy metering system includes a plurality of sensors arranged in proximity to circuit breakers of a distribution panel for sensing a magnetic field in the area of the circuit breakers and providing corresponding sensor data. The system further includes a data processing system for converting the sensor data of the plurality of sensors into electrical load information for a plurality of electrical circuits protected by corresponding circuit breakers. The system further includes a calibration unit configured to determine at least a reference voltage and a reference current of at least one circuit. The data processing system is configured to calibrate a relationship between the sensor data and the load information based on the reference voltage and reference current determined by the calibration device in a calibration mode of the energy metering system. | 06-30-2016 |