A 15MVA,6.6kV, wye connected generator has x1=x2=20% and Zo = 10%. The neutral of the generator is grounded through a reactor of 5% reactance based on the generator rating. A double line to ground fault occurs at terminals b and c. What is the current in the ground?

h 13 A 100kW generator, 25OV, 6 poles have a wave wound armature with 300 turns then the number of compensating winding turns per pole is .approximately equal to if the ratio of pole arc/pole pitch is 0.72 36 O 18 16 none of the mentioned. ) 8. 50

A generator feeds power to an infinite bus through a double circuit transmission line. A3 phase fault occurs at the middle point of one of the lines. The infinite bus voltage is 1 pu, the transient internal voltage of the generator is 1.1 pu and the equivalent transfer admittance during fault is 0.8 pu. The 100 MVA generator has an inertia constant of 5MJ/MVA and it was delivering 1.0 pu power prior of the fault with rotor power angle of 30 °. The system frequency is 50 Hz. The initial accelerating power (in pu) will be

Consider the following figure for a 4-pole, 3-phase, 24-slots double layer winding. Find the pole pitch and the slot pitch angle. 19, 20 12 19 20 ******** FORDEONEAZA I 200000 R'₁ ¹2 *******

Q3/ For the system shown in figure. The generator is supplying 1.0 pu MW power under prefault condition. When three-phase fault occur at point F. What should the value of fault reactance must be to make the critical clearing angle equal to 58.9. Sc j0.1 j0.1 10.21 BE j0.38 38 j0.21 IEgl-12 pu 10.19 F 10.19 IVI-1.00 pu j0.1 j0.1 Q4/ Figure below shows the one-line diagram