a) Explain how you would measure the open-circuit characteristics of a synchronous generator. b) The open circuit characteristics of a 6-pole synchronous generator. is given in Fig. 1. This machine is Y-connected and is rotated at a speed so that the generated voltage is 70 Hz. What is the shaft speed of this generator? What is the field current to obtain 300 V at its phase terminals? (HINT : pay attention to shaft speed) c) The field current of this generator is set to 6A. The generator is rotating at 1000 rpm. It is feeding a load with 20 A current at 0.707 lagging power factor with respect to the induced voltage in each phase. What is its terminal voltage at this operating condition. Synchronous inductance L = 9.55 mH Neclect phase resistance. d) Draw the phasor diagram of the generator for the operaing condition in (c) Es phase voltage Volts 300 200 100- 3 6 Field current 1(A) FIG. 1 obtained at shaft speed of 1000 rpm a) Explain how you would measure the open-circuit characteristics of a synchronous generator. b) The open circuit characteristics of a 6-pole synchronous generator. is given in Fig. 1. This machine is Y-connected and is rotated at a speed so that the generated voltage is 70 Hz. What is the shaft speed of this generator? What is the field current to obtain 300 V at its phase terminals? (HINT : pay attention to shaft speed) c) The field current of this generator is set to 6A. The generator is rotating at 1000 rpm. It is feeding a load with 20 A current at 0.707 lagging power factor with respect to the induced voltage in each phase. What is its terminal voltage at this operating condition. Synchronous inductance L = 9.55 mH Neclect phase resistance. d) Draw the phasor diagram of the generator for the operaing condition in (c) Es phase voltage Volts 300 200 100- 3 6 Field current 1(A) FIG. 1 obtained at shaft speed of 1000 rpm