Answer / venkatraman.s

hi friends, this question is most important one for all interview. ans is HT side voltage is high so current is low but LT transformer secondary voltage is low current is high,so we are not connected more cables in TB side so we are using bus bar. its formula is KVA/1.732* volage(HT OR LT)

Answer / perladelsur

As far as I know the reason for that is due to the withstand the dinamic force develop during a short-circuit among other

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

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