A short shunt compound dc generator supplies 7.5 kW at 230 V. the shunt field, series field and armature resistance are 100, 0.3 and 0.4 ohms respectively. Calculate the induced emf.
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10. A short shunt compound dc generator supplies 7.5 kW at 230 V. the shunt field, series field and armature resistance are 100, 0.3 and 0.4 ohms respectively. Calculate the induced emf.
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- 10. A short shunt compound dc generator supplies 7.5 kW at 230 V. the shunt field, series field and armature resistance are 100, 0.3 and 0.4 ohms respectively. Calculate the induced emf. a. 253.8 V b. 255.7 V c. 259.6 V d. 257.1 VShow that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural time period of oscillation. Deduce a formula for the time of one complete oscillation and calculate its value for a 5000-kVA, 3-phase, 10,000-V machine running at 1500 r.p.m. on constant 50-Hz bus-bars. The moment of inertia of the whole moving system is 14,112 kg-m2 and the steady short-circuit is five times the normal full-load value. ANSWER IS [1.33 second]A three-phase alternator, 20 kV, synchronous has a reactance of 10Ω and a negligible resistance. The machine draws an armature current of 150A, 0.80 pf lagging. If the steam admission is constant and field current isadjusted raising the induced emf by 25 %, find the new armature current.