• Publications
  • Influence
Frequency domain correlation technique for PD location in transformer winding
  • V. Jeyabalan, S. Usa
  • Engineering
  • IEEE Transactions on Dielectrics and Electrical…
  • 28 August 2009
Partial discharge (PD) is one of the sources of insulation failures in Power transformers. Knowledge of the PD source locations are important for transformer maintenance and repair. Due to theExpand
  • 34
  • 4
Effect of Repeated Impulses on Transformer Insulation
Power transformer plays a vital role in electrical power system. Many of the transformer failures reported are due to insulation failure in windings. The sources of failures are mainly due to impulseExpand
  • 36
  • 3
Electrical Insulation Characteristics of Silicone and EPDM Polymeric Blends. I
The typical parts of a polymeric insulator are core, metal end fittings and polymeric housing material. The housing is intended to protect the fibre glass rod from the environment and electricalExpand
  • 54
  • 3
Modified Disruptive Effect Method as a Measure of Insulation Strength for Nonstandard Lightning Waveforms
In many physical insulation systems it is often necessary to establish the approximate estimate of the breakdown voltage for nonstandard impulse voltages. The disruptive effect method, which is anExpand
  • 19
  • 2
Prediction of impulse voltage-time characteristics of air and oil insulation for different wavefronts
  • B. Sharath, S. Usa
  • Engineering
  • IEEE Transactions on Dielectrics and Electrical…
  • 28 December 2009
The insulation of all the power apparatus in the power system are tested with 1.2/50 ¿s standard lightning impulse voltage and this waveshape plays an important role in the insulation coordination ofExpand
  • 30
  • 1
Effect of Stray Capacitance on Surge Arrester Performance
This paper presents the effect of stray capacitance on voltage distribution. The voltage distribution studies during non-conduction and conduction modes of surge arrester are made. This studyExpand
  • 4
  • 1
  • PDF
Electrical field computation of polymeric insulator using reduced dimension modeling
  • R. Anbarasan, S. Usa
  • Engineering
  • IEEE Transactions on Dielectrics and Electrical…
  • 9 April 2015
In recent years, electrical field distribution is the area of major concern in the service life of Polymeric Insulators. Several methodologies are proposed to analyze the electrical field along theExpand
  • 11
  • 1
Inter disc fault location in transformer windings using SFRA
  • K. Usha, S. Usa
  • Engineering
  • IEEE Transactions on Dielectrics and Electrical…
  • 1 December 2015
Winding faults are one of the major causes for failures in Power transformer. Detection and localization of winding faults is indispensable for prevention of damages as the outage may lead to costly,Expand
  • 7
  • 1
Effective model for prediction of impulse strength of oil-impregnated paper insulation under nonstandard impulse voltages
Statistical mean volt-time characteristics for oil-impregnated paper insulation of different thickness have been plotted with standard 1.2/50 /spl mu/s impulse waveshape. A generalized integrationExpand
  • 5
  • 1
Life estimation of transformer insulation under repeated impulses
  • S. Balaji, S. Usa
  • Materials Science
  • IEEE 1st International Conference on Condition…
  • 1 December 2013
Oil Impregnated Paper (OIP) is commonly used dielectric material in transformer windings. The most of the transformer winding failures are due to breakdown of dielectric material. The breakdownExpand
  • 6
  • 1