Routine tests

• Measurement of insulation resistance

• Measurement of winding resistance (IEC 60076-1)

• Measurement of voltage ratio and check of phase displacement (IEC 60076)

• Measurement of no-load loss and no-load current (IEC 60076-1)

• Measurement of load loss (IEC 60076-1)

• Measurement of short-circuit impedance (IEC 60076-1)

• Induced overvoltage withstand test (IEC 60076-1) and (IEC 60076-3)

• Applied voltage test (IEC 60076-1) and (IEC 60076-3)

• Oil dielectric Breakdown voltage test (IEC 60156)

• Physical leakage test (with overpressure 5 psi)

Type tests

• Partial Discharge (PD) test (IEC 60076-3)

• Lightning impulse (LI) test (IEC 60076-3)

• Temperature-rise test (IEC 60076-2)