C1 a) The power input to a 2000 V, 50 Hz, three-phase motor running on full-load at an efficiency of 90% is measured by

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C1 A The Power Input To A 2000 V 50 Hz Three Phase Motor Running On Full Load At An Efficiency Of 90 Is Measured By 1 (28.66 KiB) Viewed 18 times

C1 a) The power input to a 2000 V, 50 Hz, three-phase motor running on full-load at an efficiency of 90% is measured by two wattmeters which indicate 300 kW and 100 kW respectively. Calculate (i) the input, (ii) the pf, (iii) the line current and (iv) HP Output. [1+1+1+1=4 Marks] b) A 125 KVA transformer has primary voltage of 2000 V at 60 Hz. Primary turns are 182 and secondary turns are 40. Neglecting the losses, Calculate (i) No-load secondary emf, (ii) full-load primary current and (iii) maximum flux in core. [1+1+1=3 Marks]