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Related Concept Videos

Power Factor Correction01:20

Power Factor Correction

The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
Power in a Three-Phase Circuit01:15

Power in a Three-Phase Circuit

Three-phase systems have two configurations: the wye and delta. A star configuration can be three or four wires; in a delta configuration, the components are connected in a closed loop. Instantaneous power refers to the power value at a precise moment, and in a balanced three-phase system, it is constant. This is because the sum of the instantaneous powers in the three phases remains steady over time, despite individual fluctuations, due to the symmetry and phase relationship. The total...
Three-Phase Voltages01:30

Three-Phase Voltages

A three-phase generator produces three voltages that are equal in magnitude but have a phase difference of 120 degrees. This identical magnitude and equal phase separated voltages are known as the balanced voltages and help to minimize power loss while ensuring a steady delivery of energy to connected loads. As voltage sources in a three-phase system can be configured in a wye or a delta formation, the loads connected to these systems can also be arranged in either configuration. This...
Average Power01:13

Average Power

In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.
Energy and Power Signals01:17

Energy and Power Signals

In an electrical system with a resistor, voltage and current signals facilitate the measurement of power and energy across the resistor. For a continuous-time signal, the total energy over a time interval is defined as the integral of the square of the signal's magnitude over that interval. Mathematically, this is expressed as:
Power System Three-Phase Short Circuits01:21

Power System Three-Phase Short Circuits

Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...

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Related Experiment Video

Updated: May 17, 2026

A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency
07:43

A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency

Published on: October 5, 2019

Real time voltage and current phase shift analyzer for power saving applications.

Ondrej Krejcar1, Robert Frischer

  • 1Department of Information Technologies, Faculty of Informatics and Management, University of Hradec Kralove, Rokitanskeho 62, Hradec Kralove 50003, Czech Republic. Ondrej.Krejcar@remoteworld.net

Sensors (Basel, Switzerland)
|November 1, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a new device for measuring reactive power in low-energy appliances. Optimizing reactive power can reduce electricity consumption by up to 30% and prevent power line overload.

Keywords:
analyzerphase shiftreal-time measurementremote sensors

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Last Updated: May 17, 2026

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Area of Science:

  • Electrical Engineering
  • Power Systems Analysis

Background:

  • Reactive power in power lines causes conductor overload and thermal stress.
  • Low-energy devices contribute to reactive power generation, impacting energy efficiency.
  • Optimizing reactive power can reduce electricity consumption by 10-30%.

Purpose of the Study:

  • To develop a precise real-time measuring device for analyzing reactive power.
  • To enable adequate action intervention for reactive power reduction or compensation.
  • To address design challenges including accuracy, measurement speed, cost, and size.

Main Methods:

  • Examination and discussion of a novel reactive power measuring device.
  • Focus on precise real-time measurement of input and output voltage and current.
  • Consideration of device accuracy, measurement speed, cost, and size.

Main Results:

  • A conceptual framework for a reactive power measuring device is presented.
  • The critical need for accurate real-time voltage and current data is highlighted.
  • Key design parameters for an effective and economical solution are identified.

Conclusions:

  • Accurate real-time measurement is crucial for managing reactive power.
  • The developed device aims to optimize reactive power, leading to significant energy savings.
  • Low cost and small size are essential for the widespread adoption of this solution.