The load test method for d-c machines which requires that both the motor and the generator be electrically and mechanically connected together is the A. direct-load test method. B. electrical input test method. C. loading-back test method. D. mechanical input test method.

The load test method for d-c machines which requires that both the motor and the generator be electrically and mechanically connected together is the A. direct-load test method. B. electrical input test method. C. loading-back test method. D. mechanical input test method.

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

Related questions

Q: A shunt generator has field resistor value Rf = 602 and no –load induced voltage rating Eo = 220V. A…

A: In this question, Find the new induced voltage if Field winding resistance increase. R= 60 ohm…

Q: LA 25 KW, 250V, dc shunt generator has armature and field resistance of 0.060 and 100 Q…

Q: A 100kW, 230V, shunt generator has an armature resistance and field resistance of 0. and 57.50. If…

A: In this Question, shunt generator is given....We have to find out at what load the generator achieve…

Q: 4. What is the required excitation current to obtain the rated voltage at the output terminal of the…

A: Required excitation current to obtain the rated voltage at the output terminal of the generator.

Q: A. A 20KW, 440V, SHORT SHUNT COMPOUND DC GENERATOR HAS FULL LOAD EFFICIENCY OF 87%. IF THE…

A: NOTE: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: 1- What is the main function of a diverter used in series wound DC motor? 2- What is the main…

A: In this question we will write main function of diverter used in series motor...Also main difference…

Q: Discussion: 1- Calculate the machine paramcters that is can be obtained from No-Load test. 2- Which…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Q1: A long shunt compound generator, the terminal voltage is 250 V when generator delivers 140 A.…

Q: Q3) Calculate la, the induced e.m.f., and the output of prime mover for a short - shunt compound…

A: Given, The load current is 50 A The load voltage is 380 V

Q: 1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current…

A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…

Q: Q2) How does the voltage buildup occur in a shunt DC generator during starting?

Q: 1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current…

A: It is asked the affect of loading on the Generator’s Terminal Voltage (VT) and Load Current (IL). We…

Q: a. A 12-pole 60-Hz synchronous motor drives a 10-pole synchronous machine that acts as a generator.…

A: Given P = 12, f = 60 Hz, Calculating synchronous speed

Q: The Hopkinson's test on two shunt machines gave the following results for full load : Line voltage…

Q: Q2: A: A 10-kW 250-V self-excited generator, when delivering rated load, has an armature-circuit…

A: Power delivered Vt×IL. Armature current =load current +shunt field current. We will find armature…

Q: A short shunt cumulative compound dc generator supplies 6kW at 235V. The Shunt field resistance,…

Q: Q3 Shunt d.c. generator with armature and shunt field resistance of 0.5, and 250 N respectively gave…

A: Firstly the induced emf is to be evaluated for the given data such that the points (induced emf,…

Q: A 250 V, compound generator has armature, series field and shunt felid resistance of 0.4 Q, 0.2 N…

Q: 2. For which reasons its not possible to develop rated voltage of d.c shunt generator, both in…

A: It is not possible to develop a rated voltage in dc shunt generator because of the commutation.…

Q: Compare the reaction of DC motor and DC generator. Aslo explain rule by which DC generator/motor…

A: rule by which DC generator/motor works Basically, all the machines work on faradays law of…

Q: Ql:A: The following data apply to a 100-kW 250-V six-pole, 900-rpm compound generator (long-shunt…

A: Given No Load Losses=3840Wstray losses =…

Q: What are the necessary conditions for voltage build-up in dc shunt generator ?

A: The necessary conditions for voltage build up in a dc shunt generator is given below: The…

Q: With the aid of mathematical expressions where necessary, explain the following terms with respect…

Q: A 250 V, compound generator has armature, series field and shunt felid resistance of 0.4 Q, 0.2 Q…

Q: > A 25 kW Shunt Generator generates terminal voltage at full load is 400V and has a resistances of…

Q: Questions:- 1. What is the basic different between the internal characteristics and the external…

A: As per our policy I have to do the first one only. Internal Characteristics The internal…

Q: short shunt compound dc generator delivers a load current of 30 A and 200 V and has armature, series…

A: In this question , we will find generated voltage for short shunt compound dc generator....

Q: Question 4 a) The losses in a synchronous machine affect its cost, rating, and performance. With aid…

A: NOTE: Since you have posted multiple independent questions in the same request, We will solve the…

Q: The armature, series field and shunt field resistances of a 125kW, 250V long shunt cumulative…

Q: In SPEED CONTROL OF 3 PHASE INDUCTION MOTOR [V/F METHOD] Why is kept constant in this expression?

A: SPEED CONTROL OF 3 PHASE INDUCTION MOTOR

Q: Q1. The per-unit d-axis and g-axis reactance's of a salient-pole generator are 0.9 and 0.6…

Q: Q1-(A)-Draw the power flow diagram of d.c motor and give the mathematical relationships.

A: In this question , we will draw power flow diagram of dc motor and will write equations.....

Q: (c) In analyzing load torque of a drive system, several components need to be taken into…

A: Load Torque- The amount of constant torque required to work productively is known as Load Torque.

Q: A 250 V, compound generator has armature, series field and shunt felid resistance of 0.4 Q, 0.2 N…

Q: Example 26.10. A d.c. shunt generator has an induced voltage on open-circuit of 127 volts. When the…

Q: The following information is given for a 300 kw, 600 V long shunt compound generator. Shunt field…

Q: It has been determined by test that thesynchronous reactance Xs and armature resistance raof a…

A: Given: The Synchronous reactance, Xs=j8Ω The Armature resistance, Rs=0.1Ω The Line to line voltage,…

Q: Identify the type of synchronous machine that uses number of poles two or four. a. Squirrel cage…

A: Given data, Number of poles two or fours Means (P)= 2 or 4 we know…

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

Q: Why small voltage is built up immediately in rotating shunt machine even without field excitation

A: Voltage build up of DC Rotating shunt machine

Q: 7) For a three phase, 4-Pole, synchronous machine having 48 stator slots, Find out the width factor…

A: Give Plols (P)=4Slots (s)=48phase (m)=3

Q: A 100kW, 230V, shunt generator has an armature resistance and field resistance of 0.05Ω and 57.5Ω.…

Q: Question 3:7 Discuss improvements that could be made to both motors. *Discuss improvements that…

A: An electric motor (sometimes known as the electrical motor) is a mechanism that transforms…

Q: long shunt cumulative compound dc generator delivers a load current of 60A at 440V. The shunt field…

A: In this question we need to find a induced emf and load resistance.

Q: -Could you give examples where fast breaking of induction motor is required?

A: Braking of induction motor is nothing but a process to stop a induction motor. In braking Motor…

Q: An A 20kW DC shunt generator having an armature circuit resistance of 0.8Ω and a field resistance of…

Q: Q1/ The following information is given for a 250-kW, 500-V, long-shunt compound generator: Shunt…

A: Given, the power output is 250 kW The voltage is 500 V.

Q: : For which reasons its not possible to develop rated voltage of d.c shunt generator, both in…

A: In the dc-shunt generator, the rated output dc voltage can never develop neither in loaded condition…

Q: B/ Answer the following: 1- Explain the no-load and short circuit tests of induction motor.

A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…

Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

100%

20. The load test method for d-c machines which requires that both the motor and the generator be
electrically and mechanically connected together is the
A. direct-load test method.
B. electrical input test method.
C. loading-back test method.
D. mechanical input test method.

Branch of science that deals with the stationary and moving bodies under the influence of forces.

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 by step

Solved in 2 steps

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

1.Draw the constructional view of Synchronous Machine 2. List and explain the constructional features of Synchronous Machine
The following information is given for a 300 kw, 600 V long shunt compound generator. Shunt field resistance = 75 Ω, armature resistance including brush resistance = 0.03 Ω, commutating field winding resistance = 0.011 Ω, series field resistance = 0.012 Ω, diverter resistance = 0.036 Ω. When the machine is delivering full load, calculate the voltage, power generated by the armature and efficiency.
Two synchronous machines are connected as shown in Figure 1. All values in the diagram are in per unit on a common system base. If the inputs and outputs to the two machines are represented by ?1? , ?1? , ?2? ,and ?2? respectively, derive expressions for input and output power for the equivalent machine. If ?1 = 4.5 ??/??? and ?2 = 6.0 ??/???, calculate the inertia constant, input power, and the maximum power of the equivalent machine. Assume ?1? = 1.25 ?? , ?2? = 1.1 ??. Write the swing equation of the equivalent machine.
1). Briefly describe the operation of the boost chopper.2). Explain why the maximum value of the duty cycle must be limited in certain boost choppers?
What happens to the steady-state error when the unit ramp function is applied to the input of the control system given below? Calculate.
A short-shunt generator supplies 220A at 260V. The armature resistance is 0.15Ω, shunt field resistance is 50Ω, and the series field resistance is 0.2Ω. If the SPL amounts to 4% of the total power output, determine the efficiency (in %).
Two D.C shunt generations running in parallel supply s total load current of125 A. The shunt field and armature resistances of each machine are 50 ohms and0.4 ohm respectively. The e.m.f.s. of the two generators at no load are 260 Vand 250 V respectively. Determine:(i) Current supplied by each generator: and(ii) The bus bar voltage.
Write the control mechanism of stepper motor .
Briefly explain the procedure for troubleshooting hermetic compressor motors.
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.
A gas turbine, 2-pole, 3? synchronous generator rated at 200 MW is connected to the grid (presumed to be an infinite bus). The electrical operating frequency of the grid is 60 Hz, and the slope of the frequency-power curve for the generator is 15 MW/Hz. a. If the no-load setpoint for the generator is set to 63.5 Hz, how much active power will the generator provide to the grid? b. Neglecting system losses, what is the torque provided by the gas turbine? c. What would happen if the no-load setpoint for the generator is set to 59 Hz?
4. A 6 pole wave wound shunt generator delivers 200A at a terminal voltage of 240V. Ra and Rsh are 0.03Ω and 70Ω respectively. Neglecting brush drop, determine (i) armature current (ii) current per parallel path (iii) generated voltage and (iv) Power developed. armature current ? current per parallel path ? generated voltage ? Power developed ?