Wednesday 17 July 2013

Routine Tests & Type Tests for Transformers


Routine Tests
  • Visual Inspection
  • Power Frequency Voltage withstand test at 36kV for 1min on H.T side.
  • Induced Voltage withstand test at 830V and 100Hz for 1min on L.T side.
  • Measurement of Voltage Ratio (Turn Ratio Test).
  • Measurement of no load losses.
  • Measurement of load losses and impedance voltage.
  • Bird Protection test at 8kV for 1min.
  • Verification of vector group.
  • Tank Pressure Test at 15PSI.
  • Paint Thickness Test (0.120mm Min.).
  • Dimensional Check.
Type Tests
  • Temperature Rise Test
  • Impulse Voltage withstand Test.
  • Short Circuit Test.

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