Q11. With reference to electrical short-circuits: (a) state, with reasons, THREE factors that will influence the severity of a short circuit; (6)
(b) explain the role of reactance when selecting protective devices. (4)
Q9. (a) Explain why it is necessary to provide reverse power protection for a.c. generators operating in parallel. (2)
(b) Sketch a generator protecting circuit. (5)
(c) Explain how to check the operation of the reverse power trip. (3)
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