indoor outdoor iv bus bars operate at

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Unformatted text preview: outdoor) (iv) Bus-bars operate at ........... voltage. (constant, variable) (air, oil) (v) Isolator is an ........... switch. ANSWERS TO SELF-TEST 1. (i) protective (ii) circuit interrupting (iii) no load (iv) arc (v ) closed (vi) relay (vii) shut down (viii) lower (ix) duplicate (x ) 66 2. (i) both detection and interruption (ii) circuit interruption (iii) outdoor (iv) constant (v ) air CHAPTER REVIEW TOPICS 1. What do you understand by switchgear ? 2. Discuss the various types of switches. 3. What is the difference between (i) a switch and circuit breaker (ii) a fuse and circuit breaker ? 4. Discuss the different types of bus-bar arrangements. 5. Explain the various methods of accommodating high-voltage switchgear. DISCUSSION QUESTIONS 1. 2. 3. 4. 5. 6. 7. What are the limitations of a fuse ? Why do we use C.T. in the relay circuit ? What is the necessity of bus-bar ? Why do we use isolators on both sides of the circuit breaker ? Why are isolators not opened on load ? Which faults ___ symmetrical or unsymmetrical ___ are more frequent in power system and why ? Suddenly a circuit carries a current 20 times the normal current. Is there possibility of short-circuit or overload ? GO To FIRST...
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This note was uploaded on 11/12/2012 for the course MBA 101 taught by Professor Muhannad during the Spring '12 term at Bradford School of Business.

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