• Electrical India
  • Nov 5, 2016

Particles in the transformer oil adversely affect the dielectric strength of the insulating oil. Depending on type, size and quantity of particles (metallic, water etc.), a flash-over could be generated, which can be hazardous…

  • Electrical India
  • Jul 5, 2016

It is of vital importance to monitor the condition of transformer oil. Periodic testing of transformer oil is necessary to ensure safe, economical, trouble free and undisturbed power supply...

  • Electrical India
  • Jul 5, 2016

This article illustrates the thermal behaviour of transformer with respect to the temperature rise test – and also discusses various factors that influence the test results. The article is also focusing on the causes for transformer failure and with certain remedies to overcome them...

  • Electrical India
  • Apr 5, 2016

The most expensive and important equipment in electric power system, power transformer plays a vital role in maintaining reliable and efficient electricity supply. The condition evaluation of insulating oil of power transformer is performed by oil contamination test and the Dissolved Gas Analysis (DGA) method...

  • Electrical India
  • Jan 5, 2016

Since oil does not come in contact with external air, there is hardly any deterioration of oil over a period of time and hence such transformers are virtually maintenance free...