what is the kilowatt rating of a three-phase 975-KVA generator at. a.  unity power factor ? b. 80 percent power factor ? c.   50 percent power factor  ?

Q: 5. Two 50 MVA, 3-phase alternators operate in parallel. The settings of governors are such that the…

A: When connecting transformers of the same size in parallel, the substation's space capacity is…

Q: Describe how to adjust, the load sharing of two generators running in parallel.

A: Consider that the two generators have the same speed-torque characteristics and have the same load…

Q: Explain why the alternators are never solidly grounded? How the short circuit current is limited in…

A: Alternators are the important parts of electrical machines and power systems in terms of power…

Q: Q 1 (a) Define voltage regulation of a generator. How its voltage regulation may be found by MMF…

A: “Since you have asked multiple questions, we will solve the first question for you. If youwant any…

Q: A 3-phase, Y-connected synchronous generatorisrated 15 MVA, 13.8 kV. Its resistance is negligible,…

A: An alternator/Synchronous generator is a type of electrical machine that converts mechanical energy…

Q: The speed regulations of two 800-kW alternators A and B, running in parallel, are 100% to 104% and…

A:

Q: What are the main effects of losses on the performance of the alternator?

A: Alternator- An alternator is an electrical machine that can convert mechanical input to electrical…

Q: current, load power, and power loss under this condition? 16. A 228-volt constant-potential…

A:

Q: What happened to the no-end voltage of the alternator and the voltage drop and regulation in…

A: Concept: The variation of terminal voltage with load power factor for an alternator is given by the…

Q: What will be the front and back pitches of the 6-pole dc generator with a simplex 2-layer wave…

A:

Q: What is difference in alternator and generator?

A: Difference between alternator and generator

Q: For an alternator that underwent the typical tests, connected in a star, voltage and current data…

A:

Q: (12) An alternator which is operating in parallel with other alternators at rated terminal voltage…

A: The solution is given below

Q: A 3-phase, star-connected alternator is rated at 15000 kVA, 11 kV. The armature resistance is I-5…

A: The solution is given below

Q: How a combined cycle power plant produces balanced output power?

A:

Q: how to adjust the load sharing of two generators running in parallel

A: how to adjust the load sharing of two generators running in parallel?

Q: A 760-kVA, 2300-V, three-phase, Y-connected, synchronous generator is operated at its rated speed to…

A: For given generator                                                      S=VA rating =760 ×103 V =…

Q: Two shunt generators operating in parallel delivering a total load current of 240 A. One of the…

A: Two shunt generators operating in parallel delivering a total load current of 240 A. One of the…

Q: Consider the following statements regarding the design of the distributed armature winding in a…

A:

Q: 6. A 3-phase AC generator is supplying power to a load of 3200kW at 2300V and a power factor of 60%.…

A:

Q: Write a note on capacitive compensation for power factor control.

A:

Q: Draw the circuit diagram of self excited DC compound short shunt generator, mark all current and…

A: Self excited machines are the ones whose field magnets are excited by the currents supplied by…

Q: 5. Two 50 MVA, 3-phase alternators operate in parallel. The settings of governors are such that the…

A:

Q: What will be the voltage drop and regulation in resistive, inductive, capacitive load with the…

A: What will be the voltage drop and regulation in resistive, inductive, capacitive load with the…

Q: A three-phase 480-V 1200-kVA synchronous generator supplies rated load at a lagging power factor of…

A:

Q: ii) Assume a three phase induction motor is connected to a three phase system and the shaft is…

A:

Q: 1-Plot the External, Internal and No-load characteristics curves of a de series generator.

A: You have posted multiple questions, so I am solving the 1st questions for you  1) Based on the given…

Q: - A3-phase, star-connected alternator is rated at 15000 kVA, 11 k V. The armature resistanc and…

A: The alternator is an electrical device used for the conversion of mechanical to electrical energy. A…

Q: Why brushless exciters are used in a synchronous generators. If two parallel alternators’ have…

A: The brushes are one of the important component of any machine. For the generators it is used to…

Q: What will be the frequency (in Hz)  for 100kW, 230V, 12-Pole, alternator running at 12 rps?

A:

Q: A 3-phase, star connected, 10 kVA, 400 V, salient pole alternator with direct and quadrature axis…

A:

Q: Assume two DC generator is connected to a load via DC bus. Now briefly explain how the power…

A: For the parallel operation of DC generator, The most stable DC generator is, Shunt DC generator is…

Q: A single phase, 2000 V alternator has armature resistance and reactance of 0.8 ohms and 4.94 ohms…

A: Given, A single phase alternator has V= 2000 V  R= 0.8 ohms X= 4.94 ohms I= 100 A Power factor,…

Q: A three-phase, 13.8 kV, 10 MVA, 0.8 PF-lagging, 60 Hz two-pole, Y-connected steam-turbine generator…

A: At absolute maximum active power, the reactive power is evaluated as:

Q: What will be done to keep the alternator end voltage constant, which changes as the alternator is…

A: To keep the alternator end voltage constant which changes as alternator is loaded at different…

Q: Why the efficiency of large size alternator should be larger than that of small size?

A: In large size alternator heating losses are less because conducting material have wide contact with…

Q: Introduction and explanation about alternator regulation

A:

Q: (B)- Draw the power flow diagram of d.c generator and give the mathematical Put the input power in…

A: The power flow diagram of the dc generator is shown below:

Q: Calculate the synchronizing torque for unit mechanical angle of phase displacement for a 5,000-kVA,…

A: Given data, S = 5000 kVA  f = 50 Hz N = 1500 rpm  V = 6600 V  Xs = 0.15 pu  Poles = 4

Q: A 50 MVA, 30 kV, three-phase, 60 Hz synchronous generator has a synchronous reactance of 0.9 Q per…

A: The solution is given below

Q: no.5 Q1)two dc shunt generators operating in parallel supply a total load current of (200 A ). The…

A:

Q: 4. What do you mean by stray load loss of an alternator?

A: stray load loss of an alternator

Q: A dc series generator is sipplying a current of 10A to a load trhrough a feeder of total resistance…

A: voltage at the terminal of generator = generated emf- voltage drop in field and armature…

Q: Write the equation for an induced EMF of an alternator? Why 4.44 is used? United States) 耳

A:

Q: A d.c. series generator supplies the load of 5 kW at 250 volts. The armature resistance and series…

A: Solution: Given data ; d.c. series generator ; output =5 KW , V =250 V, armature resistance Ra=1 Ω,…

Q: How does the alternator end voltage change in resistive, inductive, capacitive loads? Please…

A: Alternators are devices that are used to generate electrical energy, and they are also known as AC…

Q: 4. What for brushes are employed in DC generator?

A: DC Generator: The device that converts mechanical energy into electrical energy is called DC…

Q: 2. Design and draw a developed diagram/layout of a simple 2-layer Wave-winding for a 4-pole de…

A: DC generator- DC generator is a machine which convert mechanical energy into electrical energy of DC…

Fault Analysis

In an electrical engineering system, a fault is an abnormal electric current flowing through the system, and fault analysis is the study of these faults. For instance, a short-circuit is a fault where the live wire touches the ground or neutral wire. If a circuit is interrupted by a failure of a current-carrying wire then an open circuit fault occurs. The open-circuit faults are also called series faults. One or more phases or ground may be involved in a three-phase fault or may occur only between two phases. Current flows into the earth in case of a ground fault or earth fault. For most situations, the prospective short circuit current of a fault that is predictable can be calculated. To limit the loss of service because of a failure, the protective devices can detect fault conditions and operate circuit breakers and also other devices. All phases equally can be affected in a poly-phase system which is known as symmetric electrical fault. The asymmetric fault becomes more complicated to analyze if only some phases are affected. By using methods such as symmetrical components, the power system analysis of these types of faults is often simplified. The main objective of power system protection is to design, detect, and interrupt power system faults.