Question

What is the voltage range for large turbo-alternators?

(a) 15-20 kV

(b) 18-23 kV

(c) 20-23 kV

(d) 20-25 kV

I got this question in my homework.

This is a very interesting question from Construction of Turbo-Alternators in section Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Right option is (d) 20-25 kV

For explanation: The generation voltage normally used are 15 kV for 100-200 MW machines. The voltage range for the large turbo-alternators are 20-25 kV.