Copper or Aluminum conductor is used in the transformer windings. Whether the conductive material is copper, or aluminum varies accordingly to the specifications of the respective country and customer requirements. Insulation materials are used with maximum quality and suitable thickness. Winding machines bobbin the material with the maximum efficiency. Timsan has targeted international standards in winding quality with its experience and modern machinery park.


Timsan conducts all routine tests and some type tests in its ISO 17025 accredited laboratories. Transformers are tested at international test centers at regular intervals.

Routine Tests

  • Measurement of winding resistances.
  • Measuring the turn ratio.
  • Checking polarity or connection group.
  • Measurement of short-circuit (UK) and load losses.
  • Measurement of core losses and current.
  • Inducted voltage test.
  • Measuring the insulation resistances.

Type Tests

  • Temperature rise for liquid-Immersed transformers.
  • Determination of sound levels.
  • Requirements and test concerning pressurized corrugated tanks.

Oil Test

  • Insulating liquids-determination of breakdown voltage of power frequency.(9)
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