Question

A transformer supplied a load of 32A at 415V. If the primary voltage is 3320V,find the following: (i).Secondary volt ampere (ii)Primary current (iii)Primary volt ampere. Neglect losses and magnetizing current.

Answer 1

If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps). For a 240-volt, 3000-watt transformer, the current is 12.5 amps.