belt driven 100 Kw, shunt generator running at 300 rpm on 220 V bus bars continue to run as a motor when the belt breaks,then taking 10 Kw. what will be its speed? Given armature resistance=0.025 ohm, field resistance=60 ohms brush drop 2 V. Ignore armature reaction

belt driven 100 Kw, shunt generator running at 300 rpm on 220 V bus bars continue to run as a motor when the belt breaks,then taking 10 Kw. what will be its speed? Given armature resistance=0.025 ohm, field resistance=60 ohms brush drop 2 V. Ignore armature reaction

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter5: Resistors

Section: Chapter Questions

Problem 1PA

See similar textbooks

Related questions

Q: Given: shunt generator, efficiency=92%, %VR=5, shunt field current=3.1A, armature resistance= 0.125…

A: In the given question we know that shunt generator efficiency = 92% Shunt field = 3.1A Line…

Q: 2. A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m.…

Q: Q1) A shunt generator generated in the armature 243.6V and the resistance of the shunt field and…

Q: A shunt motor was tested by means of a pony brake having a length arm of 4 ft and a tare weight of…

A: The given data's are, Length of arm is 4 ft, Tare weigh is 6.3 lbs, Input voltage is Vin=250 V,…

Q: An 8-pole, 3.6 KW, 60V, DC machine has a Duplex LAP-wound armature which has 72 coils with 10 turns…

A: Given that Power = P = 3.6KW Pole = p= 8 Voltage = V =60V Duplex lap wound Number of coils = 72…

Q: OR FALSE) - Lenz’s law rule is used to determine the direction of rotation of dc machines. -…

A: 1) TrueDue to current flow, electromagnetic torque is produced. And the direction of electromagnetic…

Q: A d.c. shunt generator, runs at 1200 r.p.m. When the machine is driven at rated speed, the no-load…

A: In this question we need to find a emf generated voltage when machine is driven at 1050 RPM

Q: A 4-pole, 250V, wave connected shunt motor gives 12kW when running at 1000 rpm and drawing armature…

Q: A 10 kW, 250 V, dc shunt motor with an armature resistance of 0.8 ohm and a field resistance of 275…

Q: Q1.(b) A D.C. Shunt generator runs at 400 rpm and delivers 500 KW to bus-bars having a constant…

A: Here DC generator is given in which induced EMF is directly proportional to the speed. We need to…

Q: 20 kW., 200 V. shunt generator is operated at rated load. If the driving engine is developing 30 Hp,…

A: In this question dc shunt generator is given...We have to find out iron and friction losses with…

Q: A 4-pole, 240V, wave connected shunt motor running at 1000 rpm and drawing armature and field…

A: SOLUTION- Given, P =4 A = 2 (Wave connected) N = 1000 rpm Z= 540 Ia = 50A If = 1 A Eb=…

Q: rpm (full load), 300 A (full load), 0.0935 armature resistance. The motor efficiency is 90 %.…

A: Since you have asked multiple questions in a single request, we will be answering only the 1st…

Q: A short shunt compound generator supplies a current of 100A at 220V. If the resistance of the shunt…

A: Above question is based on DC generator, the major classification of DC generator are: Series…

Q: . The output of a shunt generator is 500 A at a terminal voltage of 225 V. Armature resistance is…

Q: rated load. If the driving engine(Pin) is developing 30 hp, and the armature resistance is 0.05 ohm…

Q: Nominal values of shunt dynamo; 250 kW is given as 550 V. Excitation current for nominal operating…

A: A Shunt dynamo is nothing but a DC shunt motor and follows all equations of a shunt generator. The…

Q: See attached.

A: (a)Assume ra = 0, then Eb1= Eb2 = terminal voltage = VT = 125 V.

Q: A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m.…

Q: A belt-driven 202 Hp shunt wound DC generator is running at 465 rpm and is supplying full load to a…

A: Given Belt driven Shunt compound DC generator of output P0= 202 Hp The speed N=465 rpm The busbar…

Q: 3. A 25 Kw shunt generator is delivering full output to 400V bus bars and is driven at 950 rpm by…

A: For generator Generator emf= terminal voltage +voltage drop in armature resistance. For motor,…

Q: A 350 V shunt motor runs at its normal speed of 720 r/min when the armature current is 90 A. The…

A: Given: V=350V N1=720rpm shunt motor Ia=90A Ra=0.3Ω E=V-IaRa

Q: A shunt motor by means of a prony brake having a length arm of 3.5 feet and a tare weight of 5.7…

A: According to the question we have to find the value of rotational loss.

Q: (a) What is the rated torque given conditions: a DC machine with no-load speed 6800 rpm, rated…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: A shunt generator generated in the armature 243.6V and the resistance of the shunt field and…

Q: / A 110-V shunt generator has a full-load current of 100 A, shunt field resistance of 55 Ω and…

Q: A d.c. shunt generator, runs at 1200 r.p.m. When the machine is driven at rated speed, the no-load…

A: Given the no load characteristics of DC shunt generator, Relation between generated emf and speed is…

Q: 2. A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m.…

A: As per our policy we can provide solution of first three questions only As we have given: The OCC of…

Q: 2. A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m.…

A: (i)105 V (ii)84 ohms

Q: The terminal voltage of a motor is 118 V, and the armature current is 38 A. If the armature…

Q: 2. A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m.…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: The field and armature resistance of a 400 V shunt motor are 200 ohms and 0.1 ohms, respectively.…

Q: A three-phase, 1200 HP, 2300 V, 60 Hz, synchronous machine has R. =022 When operated with the…

Q: A shunt generator delivers 1,000 W at 142 V to a load. If the armature resistance is 0 Ω, and the…

A: According to the question we have to find the value of shunt field current.

Q: A 400 kW, 600 volt, dc shunt generator has an armature resistance of 0.03 ohm. The field resistance…

Q: An 8-pole, 3.6 KW, 60V, DC machine has a Duplex LAP-wound armature which has 72 coils with 10 turns…

Q: A 20 kW shunt machine having an Armature circuit Resistance of 0.5 N and a filed resistance of 1200,…

A: Draw the circuit diagram for the DC shunt generator.

Q: Q2/ a) A separately excited DC generator when running at 1200 rpm supplies 200 A at 125 V to a…

Q: A belt-driven 150 kW shunt wound DC generator is running at 500 rpm and is supplying full load to a…

Q: 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The resistances…

Q: A 20 kW shunt machine having an Armature circuit Resistance of 0.5 Ω and a filed resistance of 120Ω,…

A: In this question , dc shunt machine given..We have to find out efficiency when acts as generator at…

Q: A 120 V shunt motor has armature and field resistances of 0.2 2 and 100 2, respectively. When no…

Q: A 25 kW, 250 V dc shunt generator has armature and field resistance of 0.06 ohm and 100 ohms…

Q: The motor has the following data 1500 rpm, 8KW, 230V. The armature resistance Ra- 0.42, the constant…

A: The value of the Firing angle is determined as shown below

Q: (i) Plot the O.C.C. for 375 r.p.m. and determine the voltage to which the machine will excite if the…

Q: A belt-driven 0.16 MW shunt-wound DC generator is running at 460 rpm and is supplying full load to a…

A: find the back emfs in both cases (i.e generating mode and motoring mode) and tage the ratio of back…

Q: A 500 V shunt motor running at 720 rpm takes an armature current of 50 Amp,its effective resistance…

Q: Example 2 The separately excited generator of example 1 is driven at revolving speed 1000 rpm and…

A: According to question, The separately excited generator of example 1 is driven at a revolving speed…

Q: Q1. The following data refer to the O.C.C of a D.C separately excited generator at 1000 rpm. Field…

Concept explainers

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.

Question

A belt driven 100 Kw, shunt generator running at 300 rpm on 220 V bus bars continue to run as a motor when the belt breaks,then taking 10 Kw. what will be its speed? Given armature resistance=0.025 ohm, field resistance=60 ohms brush drop 2 V. Ignore armature reaction.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A separately excited dc generator when running at 1200 rpm, supplies 200 A at 125 V to a circuit constant resistance. What will be the current when the speed is dropped to 1000 rpm and the field current is reduced to 80%? The armature resistance is 0.04 ohm and total brush drop is 2 V.
A separately excited d.c. generator, when running at 1200 r.p.m. supplies 200 A at 125 V to a circuit of constant resistance. What will be the current when the speed is dropped to 1000 r.p.m. and the field current is reduced to 80%? Armature resistance, 0.04 ohm and total drop at brushes, 2 V. Ignore saturation and armature reaction
A 200V long-shunt generator delivers 100A, has an armature resistance of 0.050, a series field resistance of 0.250 and a shunt field resistance of 2000. If a brush contact drop of 2.5V IS considered, what will be the developed power inside the armature of the machine?
A dc shunt motor rated at 250V, runs at 1000rpm draws a current of 25A. Determine the speed if the field is weakened by 3% for the line current of 50A. The armature and field resistances are 0.2 and 250 ohms respectively. Brush drop may betaken as 1V per brush.
A 20 kW, 480-V shunt generator, having an armature resistance of 0.15 Ω and a field resistance of 200 Ω, delivers full-load at rated voltage and 1200 r/min. The machine is now run as a motor while taking 20 KW at 480 V. What is the speed of the motor
A 10-hp (7.46 kW), 250-V. shunt motor takes a line current of 5 A. when running light. Calculate the efficiency when delivering full load output, if the armature and field resistances are 0.5 Ω and 250 Ω respectively. At what output power will the efficiency be maximum?
A 250 V shunt generator has a full load armature current of 40 A, under these conditions the losses are: FW = 200 watts, shunt field = 100 watts, core = 260 watts, brush contact = 120 watts, armature copper = 400 watts. For operation at maximum efficiency, when the constant losses are equal to those losses that vary as the square of the load, calculate the maximum efficiency.
A separately excited generator, when running at 1000 rpm supplied 200 A at 125 V. what will be load current when speed drops to 800 rpm ? The armature resistance is 0.04 ohm and brush drop is 2 V.
A permanent magnet DC motor is connected to a 250Volt(DC) source. Running 'light' (no mechanical load), it draws negligible current and turns at a speed of 200 Radians/second. (about 1910 RPM). The armature circuit of the machine has a resistance of one Q. Now the machine is loaded so that it is driving a load torque of 100 N-m, still connected to the 250 VDC source. How much current is it drawing? How fast is it turning?
A shunt motor was tested by means of a pony brake having a length arm of 4 ft and a tare weight of 6.3 lbs. The current drawn by the machine from a 250-V line was 59.0 A when the scale reading was 24 lbs and the speed of the motor was 1200 rpm. The armature and shunt field resistances of the machine are 0.1 ohm and 240 ohms, respectively. Determine the following: Torque of the motor, lb-ft Output power, HP counter emf, volts power developed, watts rotational losses, watts
a dc shunt motor runs at 900 r.p.m from a 460 V supply when taking an armature current of 25 A. Calculate the speed at which it will run from a 230 V supy when taking an armature current of 15 A . The resistance of the armature circuit is 0.8 ohms . Assume the flux per pole at 230 V to have decreased to 75 % of its value at 460 V .
Q3)A DC shunt generator has avoltage on open circuit of 150V. When machine is on load, the terminal voltage is 135V. Find the ratio between two speeds at no load and load condition (discuss the results). Assume emf induced remains unaltered. Field resistance 15(ohms), and armature resistance 0.02(ohms). Ignore the saturation. Neglect brush contact drop.