Q1. With respect to the High Voltage power systems installation, explain the different types of circuit breaker that are used, comparing them on merits and de-merits. Describe the theory of arc phenomenon and the mechanism fitted to mitigate the arc. (16)
Q2. What are the condition for producing sustained oscillations? Classify oscillations with respect to frequency range, principle involved, etc. It is possible to produce oscillations with RC networks in phase shift oscillator. Discuss in detail. (16)
Q3. With reference to the condition monitoring of electrical machinery: (a) State the important parameters that may be recorded. (8) (b) Explain how the parameters are measured and what defects may be revealed. (8)
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