Protection
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A: The solution is given below
Differentiate Phase Reversal Protection between Phase Failure Protection based on your own understanding. Discuss it briefly and thoroughly.
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- A final year project student, Raphael, learns in EEE307 that an oscillator circuit with a differential output can be built using single-ended tuned amplifiers like the one shown below: VDD C₁=R4₁ - Vout VinM₁ Fig. 3.1 Single-ended tuned amplifier schematic (image adapted from B. Razavi ©2012)Voltage sags due to short circuit and earth faults are the cause for the vast majority of equipment problems. Electronics equipment become more susceptible to voltage sag, hence the companies experience production stoppages. Voltage sag analysis is very complex issue. Based on voltage sag randon factors describe on it.Can we select components voltage references randomly in order to write KVL? Why?
- Discuss the Electrical techniques used for Failure AnalysisDefine unit and non-unit protection, illustrate the operating principle of differential protection and hence show that this protection does not respond to external fault.Circuit breaker usually operate under A) after D. C. component has ceased B) transient state of short-circuit current C) sub-transient state of short-circuit current D) steady state of short-circuit current
- Explain the principles of fault tolerance and redundancy in system design, and provide examples of how these principles are applied in real-world systems.Discuss the method of balance detection for locating partial discharge in electrical equipment. High voltage engineeringAnswer all the questions 1. Draw a 6-stage cascaded voltage multiplier circuit for high voltage DC generation and explain the working principle. 2. Compare the properties of Solid insulators and liquid dielectrics? 3. Define Basic Insulation Level (BIL) in power systems and Explain the voltage - time relationship with the curve in insulation coordination. 4. What are the three protective methods for surges, explain one method. 5. What are the different types of surge diverters and explain any two methods? 6. A 12-stage impulse voltage generator has a total generator capacitance of C1. The wave front resistance equal to 15000 2 and load capacitance of 2500pF. The wave tail resistance is 30 times of wave front resistance and if rise time is 1.5 µs. Calculate (i) the value of each capacitor of the generator and (ii) the tail time of the impulse wave?