More the transformer impedance less the fault current... so is a high value of transformer impedance good for it?

It depends a lot on the application, i would go with low impedance transformers if am using the transformers for distribution as it will really increase the the maximum fault current. If am using the transformers as step up specially for generators or to charge capacitors, using a high impedance transformer is a good idea as it will decrease the inrush current of the system.

you have to see your application and decide what fit that best.

Mohammad Jaradat

Power Generation Project Manager