| Tests carried out at ETS |
| Routine tests |
Optional Tests |
| Measurement of winding resistance |
Measurement of winding resistance |
| Measurement of voltage ratio and verification of vector connection |
Measurement of voltage ratio and verification of vector connection |
| Measurement of load losses and short-circuit impedance |
Impulse test including application of chopped waves |
| Measurement of no-load loss and magnetizing currents |
Additional dielectric tests including partial discharge measurement |
| Dielectric tests as specified by standards (applied high voltage test and induced over-potential test) |
Measurement of Zero-sequence impedance |
| Test on on-load tap-changers as appropriate |
Measurement of noise level |
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Measurement of harmonics of magnetizing currents |
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Measurement of auxiliary power consumption |
