101 to 105

101. What happens if I connect a capacitor to a generator load?

Connecting a capacitor across a generator always improves power factor, but it will help depends up on the engine capacity of the alternator, otherwise the alternator will be over

loaded due to the extra watts consumed due to the improvement on pf. Secondly, don't connect a capacitor across an alternator while it is picking up or without any other load.

102. Why the capacitors works on ac only?

Generally capacitor gives infinite resistance to dc components (i.e., block the DC components). It allows the ac components to pass through.

103. Explain the working principal of the circuit breaker?

Circuit Breaker is one which makes or breaks the circuit. It has two contacts namely fixed contact & moving contact. Under normal condition the moving contact comes in contact with fixed contact thereby forming the closed contact for the flow of current. During abnormal & faulty conditions (when current exceeds the rated value) an arc is produced between the fixed & moving contacts & thereby it forms the open circuit, Arc is extinguished by the Arc Quenching media like air, oil, vacuum etc.

104. How many types of colling system it transformers?

1. ONAN (oil natural, air natural)

2. ONAF (oil natural, air forced)

3. OFAF (oil forced, air forced)

4. ODWF (oil direct, water forced)

5. OFAN (oil forced, air forced)

105. What is the function of anti-pumping in circuit breaker?

When breaker is close at one time by close push button, the anti-pumping contactor prevent re close the breaker by close push button after if it already close.