2. The field circuit of a 200,000 watt, 230-V shunt generator is 6 A when running full load at rated terminal voltage. If the combined brush and armature resistance is 0.03 ohm, solve for the electrical efficiency of the generator.
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- What is the voltage regulation of a DC generator proportional to?A 110 V shunt generator has a full load current of 100 A, shunt field resistance of 55 ohms and constant losses of 500 W. If full load efficiency is 88%, determine the following: The input power, kW The power losses, kW The variable power losses, kW The shunt field current, Amp The armature winding current, Amp The armature winding resistance, ohms Assuming voltage to be constant at 110 V, calculate the efficiency at half full loadA 75.0 kW, 230-V shunt generator has a generated emf of 243.5 V. If the field current is 12.5 A at rated output, what is the armature resistance?
- A 35 kW, 400 V, short shunt, compound dc generator has a full load efficiency of 85 %. If the resistance of the armature and interpole is 0.35 ohm and that of the series and shunt fields are 0.15 ohm and 220 ohms respectively. Calculate the following: Output of the prime mover = kW Power developed in the armature = kw Total Copper Losses = kw Combined bearing friction, windage and core loss = kwA 150-kW 250-volt compound generator is connected long shunt. If the shunt field resistance is 20 ohms, what is the series field-current at full load? (Ans.: 612.5 A) write diagram, given, etcProblem: A self-excited shunt generator has a field resistance of 52 ohms. When the generator delivers 7 kW, the terminal voltage is 6 V, while the generated emf is 7 V. Determine the armature resistance in ohm.
- A DC shunt generator supplies a 10 kW load with an output voltage of 200 Volts. The generator's armature winding resistance is 0.25 ohm and the field (excitation) winding resistance is 50ohm. Since the efficiency of the generator under this load is 80%, which of the following is the correct mechanical losses (Pfe+Psv) in the generator?28. A 15kW shunt generator having an Armature circuit Resistance of 0.2Ω and a field resistance of 200Ω, generates a terminal voltage of 220 V at full load. Find the Efficiency of the Generator at full load. Assume the Iron, Friction, and Windage losses are 0.5 kW.A 120-V DC shunt generator has an armature resistance of 1-Ω and a shunt field resistance of 240-Ω. It delivers 9.5-A to a load. Determine the following: (a)What is the total emf generated? Neglect brush drop. (b) What is the total copper loss? (Copper loss in the armature and field) (c) Calculate the stray power losses (d) If the generator requires a mechanical input of 2-hp, what is the efficiency of the machine? (Use 1 hp = 746 W)
- The terminal voltage of a 75-kW shunt generator is 600 V at rated load. The resistance of the shunt-field circuit is 150 Q, and the armature-circuit resistance is 0.1 Ω. Find the generated emf. a) 612.9 V b) 621.9 V c) 692.1 V d) none of the above In a 50-kW 245-V shunt generator, 258 V are generated in the armature when the generator delivers rated load at rated voltage. The shunt-field current is 4 A. Find the resistance of the armature. a) 0.03 Ω b) 0.062 Ω c) 0.106 Ω d) none of the above A load that has a resistance of 8 Ω is connected to a separately excited generator that has an armature-circuit resistance of 0.5 Ω. A) What is the armature current when the generated emf is 130 V? a) 1.53 A b) 15.3 A c) 153 A d) none of the aboveA 12 KW shunt generator having an armature circuit resistance of 0.8 Ω and a field resistance of 120 Ω,generates a terminal voltage of 240 V at full load. Determinate the efficiency of the generator at full load,assuming the iron(core), mechanical and stray losses amount is 800 W.A long-shunt compound generator supplies 50 kW at 230 V. the total field- and armature circuit resistances are 46 ohms and 0.03 ohms , respectively. The brush-contact drop is 2 V. Determine the percent voltage regulation. Neglect the armature reaction.