Patents Assigned to Guildline Instruments Limited
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Patent number: 10845394Abstract: Within electrical test equipment systems comparator bridges are employed to provide the required dynamic range, accuracy, and flexibility. However, whilst bridge based measurement configurations remove many of the issues associated with making measurements at accuracies of sub-parts, a part, or few parts per million they still require, in many instances, that a null point be determined where the bridge is balanced. However, this becomes increasingly difficult within electrically noisy environments, with modern digital multimeters, and where the desired measurement point within the electrical system is physically difficult to access particularly when improved accuracy in calibration, standards, and measurements on circuits and components means measurement systems must operate at 50 parts per billion (ppb) and below.Type: GrantFiled: December 3, 2018Date of Patent: November 24, 2020Assignee: GUILDLINE INSTRUMENTS LIMITEDInventors: Tomasz Barczyk, Richard Timmons, Mark Evans
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Publication number: 20190293742Abstract: Resistor voltage dividers are commonly used to create reference voltages, or to reduce the magnitude of a voltage so it can be measured. Many measurements in test and measurement or calibration applications regularly require accuracies within the sub-part per million (ppm) range, e.g. 0.1 ppm to 1.0 ppm. However, the continued drive for improved accuracy in calibration, standards, and measurements on circuits and components means many measurements and measurement systems are operating at 50 parts per billion (ppb) and below to approximately 10 ppb. At these levels even relatively simple passive elements such as voltage dividers cannot be used without calibration and that these calibrations may be required at frequencies substantially higher than the other elements within the test and measurement equipment. Accordingly, the inventors have established a self-contained voltage divider with internal calibration allowing the voltage divider to be calibrated for every measurement if necessary.Type: ApplicationFiled: May 30, 2019Publication date: September 26, 2019Applicant: Guildline Instruments LimitedInventors: Richard Timmons, Andre Perras, Mark Evans, Tomasz Barczyk
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Patent number: 10139432Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.Type: GrantFiled: July 26, 2016Date of Patent: November 27, 2018Assignee: Guildline Instruments LimitedInventor: Tomasz Barczyk
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Patent number: 10078102Abstract: Precision AC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address improvements to dual stage and multi-stage current transducers that may form the basis of the measuring process within many of the measurement instruments providing the precision AC measurements and calibrations. Additionally, the improvements to dual stage and multi-stage current transducers provide for novel feedback controlled precision AC current sources without requiring measurement of the AC current source output directly.Type: GrantFiled: July 11, 2017Date of Patent: September 18, 2018Assignee: GUILDLINE INSTRUMENTS LIMITEDInventors: Petar Miljanic, Tomasz Barczyk
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Patent number: 9829512Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.Type: GrantFiled: October 20, 2014Date of Patent: November 28, 2017Assignee: Guildline Instruments LimitedInventor: Tomasz Barczyk
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Patent number: 9759748Abstract: Precision AC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address improvements to dual stage and multi-stage current transducers that may form the basis of the measuring process within many of the measurement instruments providing the precision AC measurements and calibrations. Additionally, the improvements to dual stage and multi-stage current transducers provide for novel feedback controlled precision AC current sources without requiring measurement of the AC current source output directly.Type: GrantFiled: March 20, 2015Date of Patent: September 12, 2017Assignee: Guildline Instruments LimitedInventors: Petar Miljanic, Tomasz Barczyk
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Patent number: 9709612Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for high accuracy voltage, current and power measurements of quasi-stationary and stationary waveforms in single and multiple phase power systems. Precision AC voltage, current, phase, power and energy measurements in power networks may be measured with current ranges from 1 mA to 20 kA and voltage ranges from 1V to 1000 kV and in a frequency range from a few hertz to one hundred kilohertz.Type: GrantFiled: May 13, 2016Date of Patent: July 18, 2017Assignee: Guildline Instruments LimitedInventors: Tomasz Barczyk, Petar Miljanic, Iain Page
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Patent number: 9632164Abstract: Precision AC and DC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address remnant magetization within the current comparators that form the basis of the measuring process within many of the measurement instruments providing the precision AC and DC measurements and calibrations. Accordingly, the inventors present current comparator and measurement system architectures together with control protocols to provide for correction of this remnant magnetization.Type: GrantFiled: July 1, 2014Date of Patent: April 25, 2017Assignee: Guildline Instruments LimitedInventors: Mark Evans, Tomasz Barczyk, Iain Page, Kenneth Mikolajek
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Publication number: 20160334443Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.Type: ApplicationFiled: July 26, 2016Publication date: November 17, 2016Applicant: Guildline Instruments LimitedInventor: Tomasz Barczyk
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Publication number: 20160252550Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for high accuracy voltage, current and power measurements of quasi-stationary and stationary waveforms in single and multiple phase power systems. Precision AC voltage, current, phase, power and energy measurements in power networks may be measured with current ranges from 1 mA to 20 kA and voltage ranges from 1V to 1000 kV and in a frequency range from a few hertz to one hundred kilohertz.Type: ApplicationFiled: May 13, 2016Publication date: September 1, 2016Applicant: Guildline Instruments LimitedInventors: Tomasz Barczyk, Petar Miljanic, Iain Page
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Patent number: 9417273Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for high accuracy voltage, current and power measurements of quasi-stationary and stationary waveforms in single and multiple phase power systems. Precision AC voltage, current, phase, power and energy measurements in power networks may be measured with current ranges from 1 mA to 20 kA and voltage ranges from 1V to 1000 kV and in a frequency range from a few hertz to one hundred kilohertz.Type: GrantFiled: April 19, 2013Date of Patent: August 16, 2016Assignee: Guildline Instruments LimitedInventors: Tomasz Barczyk, Petar Miljanic, Iain Page
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Patent number: 9069022Abstract: A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.Type: GrantFiled: January 27, 2012Date of Patent: June 30, 2015Assignee: Guildline Instruments LimitedInventors: Andre Perras, Mark Evans
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Publication number: 20150108967Abstract: Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.Type: ApplicationFiled: October 20, 2014Publication date: April 23, 2015Applicant: Guildline Instruments LimitedInventor: Tomasz Barczyk
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Publication number: 20120187966Abstract: A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.Type: ApplicationFiled: January 27, 2012Publication date: July 26, 2012Applicant: GUILDLINE INSTRUMENTS LIMITEDInventors: Andre Perras, Mark Evans
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Patent number: 8106669Abstract: A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.Type: GrantFiled: September 29, 2008Date of Patent: January 31, 2012Assignee: Guildline Instruments LimitedInventors: Andre C Perras, Mark Evans
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Publication number: 20090278527Abstract: A more precise and cost effective means than previously commercially available for measuring alternating currents up to 100 amperes in the frequency range from direct current to 100 kilohertz can be measured with precision approaching 0.001% employs a shield around a resistive network. The shield is electrically isolated from the resistive network, but acts as a heat sink to draw heat generated by the resistive network away, promoting fast stabilization times. The shield also provides electrical shielding from outside interference allowing the geometric arrangement of elements in the resistive network to minimize induced inductance and capacitance.Type: ApplicationFiled: May 1, 2009Publication date: November 12, 2009Applicant: GUILDLINE INSTRUMENTS LIMITEDInventor: Andre PERRAS
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Publication number: 20090085587Abstract: A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.Type: ApplicationFiled: September 29, 2008Publication date: April 2, 2009Applicant: GUILDLINE INSTRUMENTS LIMITEDInventors: Andre C. PERRAS, Mark EVANS