Q3. a) Describe, with the aid of a sketch, an electronic soft starting system that may be used for large a.c. induction motors. (8)
b) Discuss the advantages and disadvantages of soft starting system. (8)
Q3.a) Sketch a labelled diagram of the power circuit for a star/ delta starter. (6)
b) Explain the sequences of operation of the circuit sketched in Q3 (a) (6)
c) State two advantages and two limitations of the star/delta starting (4)
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