DieselShip's Online Content Library

Q6. (a) With reference to an autotransformer:

(i) Sketch a labelled diagram; (3)

(ii) Describe how this autotransformer is different to an ordinary power transformer; (2)

(iii) State FOUR advantages compared to an ordinary power transformer; (4)

(iv) State ONE shipboard appliction of an autotransformer. (1)

(b) An autotransformer is used to supply a single-phase, 230 V, 2 kW, unity power factor load from a 400 V supply. Calculate EACH of the following, neglecting losses;

(i) The current in the turns connected across the load; (3)

(ii) The current in the turns not connected across the load. (3)