Dry Type Transformer Testing
1. Routine Tests:
-Measurements of windings resistances (IEC 60076-1)
-Voltage ratio measurement and check of phase displacement (IEC 60076-1)
-Load loss and short-circuit impedance measurements (IEC 60076-1)
-No load loss and current measurements (IEC 60076-1)
-Separate source voltage-withstand test (IEC 60076-3)
-Induced over voltage withstand test (IEC 60076-3)
-Partial discharges measurements(IEC 60076-11)
2. Type Tests:
-Temperature rise test (IEC 60076-2/60076-11)
-Lightning impulse test (IEC 60076-3/60076-11)
-Sound level measurement (IEC 60076-10)
3. Special Tests:
-Measuring zero-sequence impedance.
-Measuring insulation resistance.
-Measuring of harmonics of the no-load current.
-Measuring of the dissipation factor (tag δ) of the insulation resistance capacitances
-Anti-corrosion protection measurement.