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Methods for testing of electrical machines

COURSE: Methods for testing of electrical machines

Code: ФЕИТ02013

ECTS points: 6 ECTS

Number of classes per week: 3+0+0+3

Lecturer: prof. Krste Najdenkoski

Subject of the course content:

Selection of testing equipment. Preparing activities for testing / inspection. Default testing of electrical machines and transformers. Methods of measurement: resistance, capacitance and dielectric losses in the insulation system of the windings, capacitance and dielectric losses in bushing, transformer ratio, magnetizing current with low voltage, transformer inductance, the polarization spectrum with return voltage, partial discharge based on ultrasound, noise and vibration, control of tap-changer, stator core test, temperature rise test.

System for automated testing of electrical machines. Acquisition of measurement data. Methods for automated load testing. Determination of efficiency: the direct method, recuperation, calorimetric method.


  1. A. Gupta, “Testing of Transformers & Induction Machines”, CreateSpace; 1st edition, 2012
  2. S.V. Kulkarni, S.A. Khaparde, “Transformer Engineering: Design and Practice”, CRC Press; 1 edition, 2004
  3. Paul Gill, “Electrical Power Equipment Maintenance and Testing”, CRC; 1 edition, 1997
  4. I.Kerszenbaum, “Inspection of large Synchronous Machines”, IEEE Press, New York, 1996