A current transformer (CT) is described as 10VA 10P20. (a) State the meaning of 10VA 10P20. (b) State the function of the above-mentioned CT. (c) Draw a schematic diagram showing the connections of overcurrent relays and carth fault relays by using 4 nos. current transformers in a 3-phase system. 4. 5. Briefly explain why high voltage distribution systems are recommended for achieving energy efficient design of electrical installations in high-rise buildings.