A 2000kW synchronous motor operates at a three - phase line-to-line voltage of 4kV. It has a synchronous reactance of 4 ohms per phase. Calculate
a) The nominal full load current of the machine when the excitation voltage E0 ( line - to-line) is 4kV.
b) The short- citcuit current when the excitation voltage E0 ( line-to-line) is 4kV.