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Related Concept Videos

Voltammetric Techniques: Pulse Voltammetry01:17

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Differential-pulse voltammetry (DPV) is a type of voltammetry that involves applying a series of voltage pulses to an electrochemical cell while measuring the resulting current. In DPV, the differential pulse or small potential pulses are superimposed on a linear potential sweep. The magnitude of these pulses is typically small, often in the millivolt range. Each voltage pulse lasts a short duration, usually in the order of a few milliseconds, and is applied at regular intervals along the...
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A voltmeter is an electrical device that measures the potential difference or voltage between two points. It is connected in parallel with the circuit element it is measuring. A parallel connection is used because elements in parallel experience the same potential difference. The voltmeter is represented by the symbol "V ".
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A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
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Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times...
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Comparative High Voltage Impulse Measurement.

Gerald J FitzPatrick1, Edward F Kelley1

  • 1National Institute of Standards and Technology, Gaithersburg, MD 20899-0001.

Journal of Research of the National Institute of Standards and Technology
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

A new facility accurately measures pulse high voltage divider ratios up to 300 kV. This system achieves high precision using comparative techniques with Kerr electro-optic and resistive dividers.

Keywords:
high-voltage impulsehigh-voltage reference measurement systemsimpulse measurementsstandard lightning impulsetransient measurements

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Area of Science:

  • Electrical Metrology
  • High Voltage Engineering
  • Optical Measurement Techniques

Background:

  • Accurate measurement of high pulse voltages is critical for power systems and research.
  • Existing methods for pulse voltage division may lack precision or broad applicability.
  • Development of reliable calibration facilities is essential for ensuring measurement accuracy.

Purpose of the Study:

  • To establish a dedicated facility for determining the ratios of pulse high voltage dividers.
  • To achieve high measurement accuracy for pulse voltage dividers in the 10 kV to 300 kV range.
  • To validate the performance of comparative measurement techniques using reference systems.

Main Methods:

  • Development of a specialized facility at NIST for comparative voltage measurements.
  • Utilization of Kerr electro-optic voltage measurement systems as a reference.
  • Employment of reference resistive voltage dividers for complementary measurements.
  • Implementation of specialized procedures for minimizing errors in reference divider construction and use.

Main Results:

  • Determination of pulse voltage divider ratios with relative expanded uncertainties of 0.4% or less (k=2).
  • Successful calibration of test dividers using complementary reference systems.
  • Identification and quantification of error sources affecting measurement accuracy.
  • Presentation of comprehensive uncertainty estimates for the developed method.

Conclusions:

  • The developed facility provides a reliable method for calibrating pulse high voltage dividers.
  • Comparative techniques using Kerr cells and resistive dividers offer high accuracy and precision.
  • The procedures and uncertainty analyses presented are valuable for high voltage metrology.