The following data relate to a 50 Hz generator. e.m.f. to neutral = 7.5 kV (rms) Reactance of generator and connected system = 5Ω Distributed capacitance to neutral = 0.02 µF (Resistance negligible) Calculate the following: (1) Maximum voltage across the contacts of circuit breaker when it breaks a short circuit current at zero current. (2) Frequency of the transient oscillation.

Q: Question 2. Considering this figure. The firing angle is 45°, the motor current is 10 A, and the…

A:

Q: In the context of power quality, what are common issues like voltage sags, swells, harmonics, and…

A: In the context of power quality, there are several common issues that can affect the quality of…

Q: Which of the following is more likely to cause problems with motors? a) positive sequence harmonics,…

A: Which of the following is more likely to cause problems with motors? Negative sequence harmonics,…

Q: A 3-phase 60 Hz I.M. has a rated speed = 1650 R.P.M., its speed at slip = -0.15 is equal to:

A: In this question,  We need to determine the speed at the slip = -0. 15 We know Synchronous speed N=…

Q: Loss of excitation is one of the stator faults of alternator which is operational at power station O…

A: 1)Loss of excitation is one of the fault on rotor. 2)Loss of excitation is a very common fault in…

Q: Please answer in typing format solution

A: Principles of Power Quality in Electrical SystemsPower quality is crucial in electrical systems,…

Q: a) Draw a graph that depict single-phase waveforms for a purely sinusoidal 50 Hz voltage with…

A: A)  Draw a graph that depict single-phase waveforms for a purely sinusoidal 50 Hz voltage with…

Q: A 80 MVA synchronous generator has Xs = j8Ω. The generator is supplying its rated power to an…

A: Given synchronous generator :80 MVA  Xs = j8 Ω. bus  voltage :33KV and  power factor : 0.9

Q: 500MVA, 21KV, star connected, 3ph 50Hz synchronous generator is operating at the rated voltage, a…

A: Types of Short circuit Transient Sub Transient Period Transient Period Steady-state period

Q: (a) Define the terms harmonics, harmonics synchronous and harmonics non- synchronous (b) List and…

A:

Q: A generator connected through 5 cycle CB to a transformer is rated 8000 kVA with the reactances of…

A: A generator is connected through the 5 cycle circuit breaker to a transformer .   It is operating at…

Q: Why the frequency will double when we rectify an ac input to dc output at the ripple factor ?

A: Ripple factor measures the amount of ripple content present in the waveform rectifier is a circuit…

Q: Difference between three phase and single phase induction motor... Don't copy from other websites…

A:

Q: Describe the effects of harmonics on power distribution system.

A: Harmonics are the undesirable noises in the power distribution system.It usually occurs due to the…

Q: Question 1 A 125 MVA, 20 kV, three-phase, wye-connected, 60 Hz, synchronous alternator is connected…

A: From the given data,to find the given answers to questions given = ?

Q: 64. A 50 Hz, 11 kV, 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase and…

A: Given, A 50 Hz, 11 kV, 3-phase alternator with earthed neutral has Reactance = 5 ohms per phase The…

Q: How does reactive power compensation improve the efficiency of power transmission

A: Efficiency will be depends on output power. Generally output power means useful power. So useful…

Q: A 220 V, 60 Hz voltage is applied across a series circuit figure comprising a coil of resistance R,…

A: NOTE:    as per our company guidelines we are supposed to answer only first three sub-parts. kindly…

Q: What is transient stability in power system

A: It is defined as when a large disturbance take place in power system if the rotor position return to…

Q: Sketch a single-phase voltage sag event and explain its characteristics. List three potential causes…

A: The frequently occurring voltage sags are single-phase events that are basically due to a…

Q: A 60 Hz, 33 kV, 3-phase alternator with earthed neutral has a reactance of 7 ohms per phase and is…

A: We have an alternator with earthed neutral which is connected to a bus-bar through a circuit breaker…

Q: Define the concept of "harmonic distortion" in power systems. What are the sources of harmonics, and…

A: Harmonic distortion refers to the presence of additional frequency components, known as harmonics,…

Q: The leakage reactance(XL) and the armature reactance (Xm)  of the three phase unloaded alternator…

A: False

Q: OLTC and transformers

A: On-Load Tap Changing Transformer (OLTC)- For the purpose of voltage regulation in large transformer…

Q: Complete the blank In AC-DC power transmission system,…

A:

Q: Plot the short circuit characteristic of the three-phase synchronous alternator.

A:

Q: 8. A 3-phase, star connected alternator is rated 500 KVA, 1.1 KV. Its effective resistance/phase and…

A:

Q: A short shunt compound generator delivers a load current of 30 A and has Ra = 0.05ohm, Rse = 0.3 ohm…

A: According to the question we have to find the value of the induced emf and armature current.

Q: 7. When power to a resistance load is controlled by full-wave SCRs with a 90° firing angle, what is…

A: In this question we need to find a load power factor of the given full wave SCR .

Q: llustrate open circuit internal circuit and external characteristic for dc shunt generator

A: Internal characteristics:   The graph which shows the relationship between load generated emf and…

Q: ) What is harmonic? Explain what are the malfunctions caused by harmonics.

A: Harmonics are signals with a frequency that is an integral multiple of the fundamental frequency.…

Q: Design a CT-FWR to supply a load of (50N) with a waveform of the following specifications: - • Vdc =…

A: In the question, Design a CT-FWR load resistance RL  =50 ohmVC = 12 V  Ripple factor = 0.1%  main…

Q: A 13.2 kV, 60 Hz, 3-phase synchronous generator is connected in star and its neutral point is…

A: Given, The supply voltage (E)= 13.2 kV(rms)  Frequency (f)= 50 Hz  Per phase inductance (L)= 0.02 H…

Q: 3. A 30, 25 kV, 500 MVA, 60 Hz alternator has a synchronous reactance X, = 1.5 pu. The alternator is…

A:

Q: (b) A three-phase A-connected synchronous generator is rated at 120 MVA, 10.5 kV, 0.85 PF leading…

A:

Q: The brushes width in Wave winding is equal to a. 1.5 commutator segments. b. 1 of commutator…

A: brushed width in wave winding is equal to?

Q: Question 2 1. Discuss the single-phase circuit with voltage control by integral-cycle triggering…

A:

Q: How do the capacitor and inductor support the circuit in power factor improvement?

A: Capacitors and inductors are commonly used in electrical circuits to improve the power factor, which…

Q: What is reactive power, and how does it affect the efficiency and stability of an electrical grid?

A: Reactive power is a fundamental concept in electrical engineering and power systems. It is distinct…

Q: "A 3-phase, 23 kv, 60 Hz synchronous generator is connected in star and its neutral point is earthed…

A: As per the guidelines we need to solve only first three sub part of given question.     we need to…

Q: a) A sinewave is having a frequency of 50 Hz and instantaneous voltage of 200 Volts at 1.2 milli…

A: In the question Following data is given f=50HzV=200 volts at t=1.2 msec a. i)  According to this…

Q: As per the standards used in power system, even harmonics are limited to 25 percent of the odd…

A: The detailed answer is solved below according to the given parameters and instructions in the…

Q: "What will be the frequency (in kHz) of transient and peak restriking voltage (in kV) repectively

A:

Q: A synchronous condenser has a synchronous reactance of 0.75 p.u. Given that it operates at its…

A: The complex power in an AC system is defined as the product of rms value of applied voltage and…

Q: A 1600KVA, 6.7 kV, 3 phase wye-connected alternator has an effective resistance of 0.50 ohm per…

A:

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.