Calculate the total resistance of the starter

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Reference no: EM131265873

A starter is to be designed for a 10 kW, 250 V shunt motor. The armature resistance is 0.15 Ω. This motor is to be started with a resistance in the armature circuit so that during the starting period the armature current does not exceed 200% of the rated value or fall below the rated value. That is, the machine is to start with 200% of armature current and as soon as the current falls to the rated value, sufficient series resistance is to be cut out to restore current to 200% (or less in the last step).

(a) Calculate the total resistance of the starter.

(b) Also calculate the resistance to be cut out in each step in the starting operation.

Reference no: EM131265873

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