Answer Happy

Q4 (a) Using sketches discuss various methods which are frequently employed in primary and secondary feeder of HV distribution. (10 marks) (b) (i). Provide reasons why power transformers may need to be connected in parallel. Explain why they should have the same per unit impedance (on a base of individual rating) and what happens if they do not. (4 marks) (ii). Explain what vector group in transformer connection, what happen if two transformers with the same rating are connected in parallel but have a different vector group. (7 marks) (iii). Draw the wiring connection of the transformer used in Q1 (e.g Dy11) (4 marks) (Total Q4: 25 marks)