(Part 2: 5 marks) A 5XY kVA 2.3 kV / 2XY V transformer is to be connected to make a step up auto-transformer. Primary voltage is 2.3 kV. (XY are the last two digits of your student ID) a. What is the secondary voltage of the transformer? (1 marks) b. What is the maximum kVA rating of this auto-transformer? (2 marks) c.What is the rating advantage of this transformer over the conventional transformer? (2 marks)

Fig: 1

Fig: 2

Fig: 3

Fig: 4