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(Solved): A star delta starter is used to control 3 phase motor. the line conductors from starter to motor are ...



  1. A star delta starter is used to control 3 phase motor. the line conductors from starter to motor are wired in 4mm copper with a resitance of 87.5 ohms. Using the resistivity value of copper calculate the length of one of the line conductors from the starter to the motor.
  2. state the relationship between the torque developed in star to that in delta and starting current to running current.
  3. a load consisting of three identical coils with a resistance of 11 ohms and inductance of 50mh are connected in (i) star and then (ii) delta to a 400v 50hz 3 phase supply. determine the total power dissipaated in each case.


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1. To calculate the length of one of the line conductors from the starter to the motor, we need the ...
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