An 1500 KW hydro turbine generator operates at 600 rpm and suddenly loses its electrical load. The inertia of the combined turbine and generator is 3000 kg.m. If the maximum permissible over-speed before the generator is damage is 20%, calculate: (3 Marks) a) The kinetic energy of the generator and turbine in normal operation and The maximum permissible speed b) The maximum kinetic energy due to over-speed before the generator is damage c) The maximum time when the flow of water to the turbine must be stopped