Tag Archives: transformer

Describe an auto-transformer starter. From the expression for power input per phase (ec torque) show that for a turns ratio n of 4-§ : 1 , for the auto-transformer. VS V R„ • the power input to the motor/phase = ‘- n2z 2 P direct on-line torque 3 • the motor starting torque = • using a star/delta starter the motor starting torque is the same as the auto-transformer above.

5 6. (i) Describe an auto-transformer starter. From the expression for power input per phase (ec torque) show that for a turns ratio n of 4-§ : 1 , for the auto-transformer. VS V R„ • the power input to the motor/phase = ‘- n2z 2 P direct on-line torque 3 • the motor starting […]