A power transformer is also called a power voltage regulator, and it has a lower voltage regulator than.
A power transformer is by higher voltage, lowering the voltage compared to a transformer.
They are generally used for lowering energy consumption by allowing voltage to be different. On the other hand, a 1000kva power transformer is also used for different voltages.
Similarly, 1000kva power transformer is different in terms of its stabilization and powertage. There is a difference between the 1000kva and 10kva power transformer for different purposes.