Electric Traction | List out special features of traction transformer as compared to conventional transformer.

Special Features of Traction Transformer as Compared to Conventional Transformer:

1) Specially designed to withstand severe operating conditions. 

2) Have high short time peak capacity. 

3) Class A insulation specially reinforced to withstand stresses of frequent short circuits. 

4) Can take overload as 50% for 15 min, 100% for 5 min, 120% for instantaneous.

5) Impulse withstand voltage is nearly 5 times higher.

6) To limit the effect of short circuit, impedance should not be less than 8.5 %  for 10 MVA and 10 % for 12.5 MVA.