CORE 

 

Superior quality low loss, CARGO stampings along with good design practices ensures Low core losses.

 

WINDING 

 

Use of EC grade CU/AL and Electric grade insulating paper, Liberal cooling ducts, Ensure low losses, Low temperature rises and good strength.

 

CLIMBING OF COILS 

 

Climbing of coils is done by HYDRAULIC CYLINDERS to withstand short Circuit  forces, as per the design requirements.

 

DURING MANUFACTURING PROCESS 

 

  • Ratio and phase angle error test before connection are brazed.
  • Vector group test before connection are brazed.
  • Magnetic balance.

 

PRESSURE TEST 

 

 

Before dispatched all the transformers are tested at specified pressure to ensure leak proof joints.

 

ROUTINE TEST 

( AS PER IS 2026:1997 )

  • Ratio 
  • I. R. values
  • No Load loss test
  • Separate source voltage test
  • Load loss and impedance test
  • Vector group test
  • Winding resistance/OLTC M.B.B. Contact Checking
  • Induced over voltage test

 

 

TYPE TEST

 

  • Temperature rise text ( Heat – Run Test )
  • Zero sequence impedance test
  • Dynamic short circuit test
  • Impulse test

 

SPECIAL TEST 

 

 

All the designs are tested for the heat run test. In house heat fun test facility available up to 2000 kva. Oil test facility like tan delta, resistivity, acidity, ppm and suspended particles are available in house.