A 1500 kVA, star-connected, 6.6-kV salient-pole synchronous motor has X_{d} = 23.2 \Omega and X_{q}=14.5 \Omega / \text { phase } respectively; armature resistance being negligible.
Calculate the excitation emf when the motor is supplying rated load at 0.8 leading pf.
What maximum load the motor can supply without loss of synchronism, if the excitation is cut off? What will be the value of torque angle under this condition.