Resistor switching is used in which type Circuit Breaker
?
a) oil filled CB b) Air blast CB c) Gas filled CB
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Answer Posted / anup $ingh
Obviously Air Blast Circuit Breaker
See.. http://www.oocities.org/hemant_thermal/airblastcircuitbreaker.htm
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ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
