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Q9. a) Sketch a circuit showing how the emergency generator is started, connected to the emergency busbars and how the main busbars are disconnected in the event of a blackout.(6)

b) Explain how an emergency generator can be tested to ensure that it is capable of satisfactorily delivering the rated power.(4)

Q11. (a) Sketch a circuit diagram of an emergency generator power supply and distribution system, indicating the essential services provided at 440 volts ac, 220 volts ac and 24 volts dc. (6)

(b) State the regulation pertaining to the emergency generator. (4)

Q10.During a complete loss of electrical power, essential vital services can be maintained by means of an Uninterruptable Power Supply (UPS).

(a)Describe, with the aid of a block diagram, the operation of an a.c. input UPS arrangement. (7)

(b)List SIX essential services that the UPS may support.  (3)

Q10. (a) Sketch a circuit diagram of an emergency generator power supply and distribution system, indicating the essential services provided. (6)

(b) State the emergency generator regulations. (4)