935are 2500 conductors lap-connected and the full-load copper losses are 25 kW? Calculate the area of the poleshoe if the gap density has a uniform value of 0.9 wb/m2 and find the no-load terminal voltage, neglecting15. A 1500 kW, 550-V, 16 pole generator runs at 150 rev. per min. What must be the useful flux if therearmature reaction and change in speed.(Rajiv Gandhi Techn. Univ., Bhopal, 2000) [0.09944 m2, 559 17

In this question dc generator is given....We have to find out no load terminal voltage and area of…

935 shoe if the gap density has a uniform value of 0.9 wb/m2 and find the no-load terminal voltage, neglecting are 2500 conductors lap-connected and the full-load copper losses are 25 kW? Calculate the area of the pole 15. A 1500 kW. 550-V, 16 pole generator runs at 150 rev. per min. What must be the useful flux if there anmature reaction and change in speed. (Rajiv Gandhi Techn. Univ., Bhopal, 2000) [0.09944 m? F

935 shoe if the gap density has a uniform value of 0.9 wb/m2 and find the no-load terminal voltage, neglecting are 2500 conductors lap-connected and the full-load copper losses are 25 kW? Calculate the area of the pole 15. A 1500 kW. 550-V, 16 pole generator runs at 150 rev. per min. What must be the useful flux if there anmature reaction and change in speed. (Rajiv Gandhi Techn. Univ., Bhopal, 2000) [0.09944 m? F

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.24P: For Problem 3.18, the motor operates at full load, at 0.8 power factor leading, and at a terminal...

See similar textbooks

Similar questions

For Problem 3.18, the motor operates at full load, at 0.8 power factor leading, and at a terminal voltage of 10.45 kV. Determine (a) the voltage at bus 1, which is the generator bus, and (b) the generator and motor internal EMFs.
In a three-phase, Y-connected, 750-kVA, 1732-V, synchronous generator afield current of 20 A at the rated speed produces a current of 300 A onshort circuit and a voltage of 1732 V on open circuit. The resistance betweenany two terminals of the generator is 0.8 R. Determine the synchronousreactance of the generator. The rotational loss is 20 kW. Using the per-unitsystem, determine the voltage regulation and the efficiency of the generatorwhen it delivers the rated load at its rated voltage and unity power factor.
A short shunt compound generator supplies a load of 10 kW at 200 V through a pair of feeder and series field resistance 0.10 ohm. Armature resistance, shunt field resistance and series field resistance are 0.01 ohm, 52.2 ohms and 0.10 ohm, respectively. If the core friction and windage losses amount to 631 watts, the BHP of the driving engine is nearest to
QUESTION 1:- (a) A 4-pole, 3-phase, star-connected, 50 Hz synchronous generator, with a synchronous impedance of j24.5 Ω/phase and negligible resistance, delivers 5 MW of power to a 13.8 kV busbar. At this operating point, the excitation is equal to 1.8 p.u. Calculate the phase value of the generated emf (E) and hence calculate the electrical load angle, δ, at which the machine is operating. (b) Sketch a typical operating chart for a salient pole synchronous generator and on the chart identify the following; The Apparent Power limit, The field (excitation) limit, The Real Power limit, A line which represents a constant lagging power factor, The rotor angle for operation at any given point of operation, e.g. rated power and 0.9 power factor lag. (c) A Stamford HCI534F framesize generator has been selected for a stand-alone diesel-generation application. The generator is to operate at 400 V, 50 Hz, with the self-excited (SX) excitation scheme. Datasheet information can be…
A long shunt compound DC generator delivers a load current of 150A at 230V and has armature, series field and shunt field resistances of 0.032, 0.015 and 92Ωrespectively. Calculate (i) induced emf (ii) total power generated and (iii) distribution of this power (iv) voltage regulation
Show 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 shunt generator supplies a 31kW load at 230V through cables of resistance, R = 122mΩ. If the field winding resistance, Rf =50Ω and the armature resistance, Ra =51mΩ. Determine the following below: The terminal voltage is, Answer and unit for part 1 The e.m.f. generated in the armature is,
A 3 phase, star connected synchronous generator supplies current of 10A having phase angle of 20º lagging at 400V. Find the load angle and the components of armature current Id and Iq if Xd = 10 ohm and Xq = 6.5 ohm Assume armature resistances to be negligible
Two similar 6,600-V, three phase generators are running in parallel on constant-voltage andfrequency bus bars. Each has an equivalent resistance and reactance of 0.05 Ω and0.5 Ω respectively and supplies one half of a total load of 10,000 kW at a laggingp.f. of 0.8, the two machines being similarly excited. If the excitation of onemachine be adjusted until the armature current is 438 A and the steam supply to theturbine remains unchanged, find the armature current, the e.m.f. and the p.f. of theother alternator.
A Y- connected, 10-KVA, 230- has a field winding resistance of 4.59. At an operation of 0.85 lagging power factor, the excitation current is recorded at 10A. the core loss is 300W, and the mechanical loss is 200W. If the corresponding efficiency is 84.9%. calculate the per- phase armature winding resistance.
A short-shunt connected compound DC generator delivers 219 A to a load at 250 V. Its shunt-field resistance is 26.8Ω, its shunt-field rheostat resistance is 6.2Ω, its series-field resistance is 0.042Ω, and its armature resistance is 0.096Ω. Find the copper losses in ... A) the shunt-field winding, a) 382.5 W b) 1653.4 W c) 2014.36 W d) none of the above B) the shunt-field rheostat, a)382.5W, b)2014.36, c)4940.25W, d) none C) the series field, a)382.5W, b)1653.4W, c)2014.36, d) none D) the armature winding, a) 382.5W, b)2014.36W, c)4940.25W, d) none
A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 87%. If theresistance of the armature and interpoles is 0.4 Ω and that of the series and shunt fields 0.25 Ωand 240 Ω respectively, calculate the combined bearing friction, windage and core-loss of themachine.