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Related Concept Videos

Insulation Coordination01:23

Insulation Coordination

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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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Types of Fluids01:27

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Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
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Ultrastable Natural Ester-Based Nanofluids for High Voltage Insulation Applications.

Georgios D Peppas1, Aristides Bakandritsos2, Vasilis P Charalampakos3

  • 1Department of Electrical and Computer Engineering, University of Patras , 26504 Rio, Greece.

ACS Applied Materials & Interfaces
|September 2, 2016
PubMed
Summary

Researchers developed stable iron oxide nanocrystal nanofluids for high voltage insulation. These advanced dielectric fluids overcome nanoparticle sedimentation, offering enhanced dielectric strength and thermal response for industrial applications.

Keywords:
colloidsdielectricsinsulation systemsnanocrystalsnanofluids

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Nanofluids show promise as liquid dielectrics in high voltage insulation.
  • Nanoparticle sedimentation and phase separation hinder widespread adoption.

Purpose of the Study:

  • To develop and characterize colloidally stable natural ester oil insulation systems using iron oxide nanocrystals.
  • To address the challenge of nanoparticle sedimentation in dielectric nanofluids.

Main Methods:

  • Development of natural ester oil insulation systems with iron oxide nanocrystals.
  • In-depth characterization of colloidal stability and dielectric properties.
  • Analysis of breakdown voltage and dissipation factor (tan δ) at various concentrations.
  • Comparison with systems containing commercial iron oxide nanoparticles.

Main Results:

  • Developed ultrastable nanofluids free from sedimentation and phase separation.
  • Achieved increased dielectric strength, faster thermal response, and lower dielectric losses (tan δ).
  • Demonstrated very high endurance during discharge stressing compared to conventional systems.
  • Identified superior performance and reliability over systems with commercial nanoparticles.

Conclusions:

  • The developed iron oxide nanocrystal nanofluid offers a significant breakthrough for high voltage insulation technologies.
  • Ultrastable nanofluids overcome key limitations of traditional dielectric oils.
  • This advancement promises enhanced performance and reliability in industrial insulation applications.