Testing & diagnosis of power transformers - Sweden

Course content

Test methods and standards
▪ Turn ratio test (TTR)
▪ Winding resistance measurement (MTO)
▪ Isolation testing (MIT/S1)
▪ Dielectric loss (DELTA)
▪ Breakthrough voltage of oil (OTS)
▪ Diagnostic tests
▪ Dielectric spectroscopy (DFR/FDS), state of isolation paper (IDAX, VAX)
▪ Sweep Frequency Response Analysis (FRAX)
▪ Multifunctional test equipment (TRAX)

Setup and handling of instruments

Measurement setup

Requirements

General knowledge of electrical grids and the role of the transformer.

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