Furnace transformer

[samerakhaled1]

I am wondering if anybody and explain briefly the construction theory of the furnace transformer, how are the core and windings different from the power transformer?
Is there any special cooling requirement for this type of this transformers?

 

[ScottyUK]

As in ladle-arc furnace for steel-making, that kind of thing?

Massively braced for the near short-circuit conditions which the transformer is frequently exposed to. Relatively high reactance to control the available fault current. Wide range on-load tapchanger to allow control of the process.

 

[thermionic1]

I have seen units that were water cooled for both the active part and the LV bus bars.

 

[prc]

Core not any different. Only LV winding and connections are different as the current is very high,several kA. As scotty said the voltage variation required in high, usually done by indirect regulation to match with OLTC ratings. Robust clamping of windings to withstand frequent short circuits at LV terminals, though the currents are limited by reactors. Normally water cooled due to space restrictions at sites and need for water cooling the LV bus connections.