A long shunt compound generator supplies 22 kW at a terminal voltage of 220V. The resistance of the armature, shunt field and series field are respectively 0.05 ohm, 110 ohms and 0.06 ohm. If the overall efficiency at the above load is 88%, find the iron and friction losses. Choices 1416 W 1461 W 1641 W 1614 W

A long shunt compound generator supplies 22 kW at a terminal voltage of 220V. The resistance of the armature, shunt field and series field are respectively 0.05 ohm, 110 ohms and 0.06 ohm. If the overall efficiency at the above load is 88%, find the iron and friction losses. Choices 1416 W 1461 W 1641 W 1614 W

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.48P

See similar textbooks

Similar questions

Sketch the load characteristic of a d.c. generator with (i) shunt (ii) series excitation. Give reasonsfor the particular shape in each case.The O.C.C. at 700 r.p.m. of a series generator with separately-excited field is as follows :Field current (A) : 20 40 50 60 75Armature e.m.f. (V) : 190 360 410 450 480Determine the current and terminal voltage as a self-excited series machine when running at 600 r.p.m.with a load of 6 Ω connected to the terminal. Resistance of armature and series winding is 0.3Ω. Ignore effectof armature reaction.
Q2: A500 kW , 500 V, 10 poles d.c generator has lap wound armature Find the electrical angle shift of brushes when ATd / pole = 208 AT . If the ATC for same generator when connected as wave wound is 2600 AT when the brushes on G.N.A .
2. A 220-V long-shunt compound d.c. generator is supplying 100 A to a load. The resistances of the shunt field, the series field, and the armature are 50 ohms, 0.025 ohm, and 0.05 ohm respectively. Find the following:
A polyphase system is generated by______? a.Both a and c b.Having two or more generator windings separated by equal electrical angle c.Having generator windings at equal distances d.None of these
Incremental fuel cost of a generator is given as 3 P12+ 40 P1 +90 $/MWh. Give the cost function and Calculate the operating cost of the generator for meeting 100 MW, if the fixed cost is 20$/h?
Problem details: A 15 kW, 280V, 1200 rpm washing machine needs to be fed by a generator in your home. You have a friend in a generator manufacturer company. He gave you different options and as you’re studying in EE department, he asked you to choose the best one from those! The generator details are as shown Type of Generator: Series Armature resistance (Ω) = 0.8 Field resistance (Ω) = - Series Resistance (Ω) = 2.2 Hysteresis loss (kW) = 1.1 Eddy current loss (kW) = 1.7 Rotational loss (kW) = 1.2 Calculate the following things for each of the generator types: a) The generated voltage b) The field circuit voltage c) The developed torque d) The efficiency Also neatly draw the circuit diagram for all of them.
Problem: A short-shunt compound generator has armature, shunt field and series field resistances of 0.5 Ω, 156 Ω, and 0.465 Ω respectively. If it supplies a load of 9 kW at a terminal voltage of 241 V, calculate the generated emf in volt. *Four decimal places
No. 8 problem A shunt generator has the following open-circuit characteristic at 800 r.p.m. Field amperes : 0.5 1.0 1.5 2.0 2.5 3.0 3.5E.M.F. Volt : 54 107 152 185 210 230 245 Armature and shunt field resistances are respectively 0.1 Ω and 80 Ω. The terminal p.d. falls to 175 V when the armature current is 100 A. Find the O.C. volts and the volts lost due to (i) reduction in the field current(ii) armature resistance (iii) armature reaction.
How many poles should a 60-Hz generator have, if it is connected to a turbine operating undera design head of 3000 ft with a flow of 82 cubic feet per second? Assume turbine specific speedand efficiency of 3 rpm and 84% respectively.
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 short-shunt compound generator supplies a load of 10kW at 200V through a pair of feeder resistance 0.10, armature resistance is 0.010 and the shunt field resistance is 52.50 and the series field resistance is 0.102. If the SPL amounts to 631W, determine d) Electrical η ( 87.96% ) e) Commercial η. (83.33%)
A dc shunt generator 50 V at the load 6A, rotating 700 r.p.m at the torque 4 N.m. Find the efficiency of generator?