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2. Assume a 480V, 60Hz, four-pole Y-connected three-phase synchronous generator. This generator has a synchronous reactance of 0.12 and armature winding resistance 0.01502. The given
2. Assume a 480V, 60Hz, four-pole Y-connected three-phase synchronous generator. This generator has a synchronous reactance of 0.12 and armature winding resistance 0.01502. The given load takes 200 A (RMS) 0.866 PF lagging line current at 480V (line-to-line RMS terminal voltage Vn) for 100% (full) load. Assume the per-phase voltage V, at angle zero and no loss. a. Sketch the per-phase equivalent circuit and find the phasor of internal phase voltage . when the generator is supplying full-load at rated speed with rated voltage. b. Suppose the load current is reduced to 100A (RMS). What is the torque (or load) angle of the generator when supplying the load current at 0.866 PF lagging? Ignore armature resistance for this calculation and assume the field current and prime mover speed are unchanged
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