Basic Electrical Course File (2)

COURSE FILE FOR

IIMT ENGG COLLEGEEN 1st YrCOURSE FILE FOR BASIC ELECTRICAL ENGINEERING By-AVINASH KR CHAUHANMAWANA ROAD`OpocketGanganagar MEERUT

IIMT ENGINEERING COLLEGE, MEERUT(127)MAWANA ROAD GANGANAGAR MEERUT

Course File-

INDEX1. TIME TABLE

2. SYLLABUS

3. LECTURE PLAN

4. LESSON PLAN

5. LECTURE NOTES

6. TUTORIALS SHEET WITH SOLUTION

7. ASSIGNMENT

8. QUESTION BANK

9. MODEL QUESTION PAPER

10. DETAIL OF OTHER ACTIVITY

NAME OF FACULTY MR. AVINASH KR CHAUHAN

SUBJECT WITH CODE BASIC ELECTRICAL ENGINEERING (EE-201)

DEPARTMENT ELECTRICAL AND ELECTRONICS

SEMESTER SECOND

SyllabusUnit-I1. D C Circuit Analysis and Network Theorems:Circuit Concepts: Concepts of network, Active and passive elements, voltage and current sources,source transformation, unilateral and bilateral elements, Kirchhoffs laws; loop and nodal methods of analysis; star-delta transformation; Network Theorems: Superposition Theorem, Thevenins Theorem, Maximum Power Transfer Theorem (simple numerical problems with resistive element)Unit-II2. Steady-State Analysis of Single Phase AC Circuits:AC Fundamentals: Sinusoidal, square and triangular waveforms-average and effective values, form and peak factors, concept of phasors, phasor representation of sinusoidally varying voltage and current, concept of impedance, analysis of series, parallel and series-parallel RLC Circuits: apparent, active & reactive powers, power factor, resonance in series and parallel circuits, bandwidth and quality factor (simple numerical problems).Unit-III3. Three Phase AC Circuits:Three phase system-its necessity and advantages, meaning of phase sequence, star and delta connections, balanced supply and balanced load, line and phase voltage/current relations, three phase power and its measurement (simple numerical problems).4. Measuring Instruments:Types of instruments, construction and working principles of PMMC and moving iron type voltmeters & ammeters, single phase dynamometer wattmeter and induction type energy meter, block diagram of multi-meter & megger. Unit-IV5. Magnetic Circuit:Magnetic circuit concepts, analogy between electric & magnetic circuits with DC excitations, magnetic circuit calculations. 6. Introduction to Power System:General layout of electrical power system and functions of its elements, standard transmission and distribution voltages, concept of grid (elementary treatment only).7. Single Phase Transformer:Principle of operation, construction, e.m.f. equation, equivalent circuit, power losses, efficiency(simple numerical problems), introduction to auto transformer.Unit-V8. Electrical Machines:DC machines: Construction, e.m.f. equation of generator and torque equation of motor. Types and DG machines, characteristics and applications of dc motors (simple numerical problems).Three Phase Induction Motor: Constructions types, rotating magnetic field. Principle of operation, slip-torque characteristics, applications (numerical problems related to slip only).Single Phase Induction motor: Principle of operation phase splitting methods of starting, applications.Three Phase Synchronous Machines: Principle of operation of alternator and synchronousmotor and their applications.

IIMT ENGINEERING COLLEGE, MEERUT(127)MAWANA ROAD GANGANAGAR MEERUT Course Plan

Department - ME Semester: Ist Section- ASession 2013-2014 Name of Faculty member Avinash kr chauhan Name of Subject: Basic Electrical Engg. Total no. of classes- 55S.no. TopicsNo. of Lecture DateRef Book

Unit-1 ( D C Circuit Analysis and Network Theorems)

1Concepts of network Active and passive elements, voltage and current sources117/08/131,2

2Source transformation, unilateral and bilateral elements119/08/132

3Basic Terminology of N/w , Intro to KVL and KCL120/08/132

4Nodal methods of analysis, Numericals on KCL122/08/131,2

5Loop methods of analysis, Numericals on KVL123/08/132

6Supermesh and Supernode analysis and numericals124/08/132

7Superposition Theorem, Numericals on superposition theorem126/08/131,2

8Numericals on superposition theorem127/08/132

9Thevenins Theorem, Numericals on Thevenins Theorem129/08/132

10Numericals on Thevenins Theorem, Maximum Power Transfer Theorem130/08/131,2

11Proof of Maximum Power Transfer Theorem, Numericals131/08/132

12Numericals on Maximum Power Transfer Theorem & Thevenins Theorem,Star-delta transformation12/09/131,2

13Numericals on Star-delta transformation13/09/132

14Class Test14/09/131,2

Unit-2( Steady-State Analysis of Single Phase AC Circuits)

1 AC Fundamentals: Sinusoidal, square and triangular waveforms 15/09/131,2

2Average and effective values , Numericals on different values and calculation of factors16/09/132

3RMS and Average value of Different wave forms17/09/132

4Numericals on different waveform 19/09/132

5Form and peak factors, Numericals on Form and peak factors110/09/132

6Concept of phasors ,Addition and Substraction of Phasors111/09/132

7Phasor representation of sinusoidally varying voltage and current112/09/132

8Analysis of R , L and C 113/09/132

9Concept of impedance, Analysis of series RLC Circuits numerical114/09/131,2

10RLC Circuits numerical116/09/132

11Analysis of parallel RLC Circuits, Numericals117/09/131,2

12Analysis of series-parallel RLC Circuits118/09/132

13Apparent, active & reactive powers, Power factor119/9/132

14Resonance in series circuits120/09/132

15Resonance in parallel circuits121/09/132

16Bandwidth and quality factor123/09/132

17Class Test124/09/132

Unit-3( Three Phase AC Circuits and Measuring Instruments)

1Three phase system-its necessity and advantage, Meaning of phase sequence125/09/131,2

2Balanced supply and balanced load, Line and phase voltage/current relations Three Phase Star Connections126/09/132

3Line and phase voltage/current relations Three Phase Delta connection127/09/131,2

4Numericals on line voltage/current and phase voltage/ Current of Y/128/09/132

5Three-phase power and its measurement, Numericals on Two Wattmeter Method130/09/131,2

6 Types of instruments11/10/132

7Construction and working principles of PMMC, Construction and working principles of moving iron type voltmeters & ammeters12/10/132

8Single phase dynamometer wattmeter ,Induction type energy meter13/10/132

9Block, diagram of multi-meter & megger104/10/13

Unit-4 (Magnetic Circuit, Introduction to Power System, Single Phase Transformer)

1General layout of electrical power system and functions of its elements concept of grid15/10/132

2Magnetic circuit concepts, Analogy between electric & magnetic circuits with DC excitations17/10/131,2

3Magnetic circuit calculations18/10/132

4Principle of operation, construction of transformer, E.m.f. equation, equivalent circuit of transformer19/10/131,2

5Power losses, efficiency, Introduction to auto transformer110/10/131,2

6Numericals111/10/132

Unit-5

DC machines

1Construction, e.m.f. equation of generator112/10/132

2torque equation of motor and numerical, Types and DG machines115/10/132

3characteristics and applications of dc motors & Numericals116/10/132

Three Phase Induction Motor

4Constructions types, rotating magnetic field. Principle of operation117/10/132

5slip-torque characteristics, Applications and numerical118/10/132

Single Phase Induction motor

6Principle of operation phase splitting methods of starting119/10/132

7Applications and numerical121/10/132

Three Phase Synchronous Machines

8Principle of operation of alternator and synchronous motor122/10/132

9Applications and numerical123/10/132

SIGN. Faculty: HOD SIGN:

* Book Refered1. V. Del Toro, Principles of Electrical Engineering Prentice Hall International2. D.P. Kothari & I.J. Nagarath, :Basic Electrical Engineering Tata McGraw Hill

Unit(1) Tutorial 1Note- Attempt any four questionsQUES 1 Find the node voltages V1 and V2. QUES 2. Find the current through R2 and R3 using mesh analysis. Ques 3. Find the voltage across R3 using Nodal analysis.

Ques4. Find the current labeled "I" using both mesh analysis.

5. Determine Thevenins equivalent across the terminals AB for the circuit shown in figure below.

Unit(1) Assignment 1Note- Attempt any four questionsQues1..Find the value of RL so that maximum power is delivered to the load resistance shown in figure.

Ques2.. Using superposition theorem find the current in 10 ohm resistor of the network shown below.

Ques3..Find the current in each resistor using superposition principle of figure. Ques4. Solve for currentin5 ohm resistor by the principle of superposition theorem.

Ques 5. State and explain maximum power transfer theorem for variable pure resistive load.

Unit(2) Turorial 11. Write the relation between the line and phase value of voltage and current in a balanced starconnected load?2. Write the relation between the line and phase voltage of voltage current in a balanced deltaconnected load.3. Explain the terms real power, apparent power and reactive power for ac circuits and also theunits used.4. Derive the equivalent star circuit from a delta circuit.5. With the help of neat diagram, explain the functioning of a full-wave rectifier. Clearlyexplain the importance of(i) PIV(ii) Ripple factor(iii) Voltage regulation(iv) Capacitor filter in the context of a full-wave rectifier with centre tappedTransformer

Unit(2) Assignment 11. An a.c circuit consists of a pure resistance of 10 ohms and is connected across an a.c supplyof 230V, 50 Hz. Determine (i) current flowing through the circuit.(ii) Power consumed by the circuit.(iii) Write down the equation for voltage and current.2. Find the impedance, current and power factor of the following series circuits and draw thecorresponding phasor diagrams i) R and L ii) R and C iii) R, L and C. In each case theapplied voltage is 200volts and the frequency is 50Hz. R = 10 , L =50 mH, C= 100 microF.3. A series R-L-C circuit consists of a 100resistor, an inductor of 0.318H and a capacitor ofunknown value. When the circuit is energised by 230 V , 50 Hz sinusoidal a.c. supply,the current is found to be 2.30 A. Find(i) value of capacitor in microfarad.(ii) voltage across the inductor.(iii) total power consumed4. Two coils when connected in series have a resistance of 18 and when connected inparallel have a resistance of 4 . Find the resistance of each coil. 5.Three non- inductive resistances of 5 , 20 , and 25 are connected in delta. Obtain itsequivalent star connected system maintaining the same phase sequence.

Unit 3 Turorial 11. A Wheatstone bridge consists of AB = 4, BC = 3 , CD = 6 and DA = 5 .A 2 volt cell is connected between B and D and a galvanometer of 10 between A and C.Find the current through the galvanometer.2. Derive an expression of torque equation for a moving Iron Instrument and comment on the nature of the scale. Meter A has a range of (010V) and a multiplier resistance of 18 k?. Meter B has a range of (0300V) and a multiplier resistance of 298 k?. Both meter movements have a resistance of 2 k?. Which meter has a better accuracy? Why?3. Explain the errors encountered in electrodynamometer type instruments.

4. A meter having a full scale deflection of 1 mA and Rm of 300 ? is to be used to measure sinusoidal ac voltage of 010V range. Compute the multiplier resistance that is required. Assume the diode has a forward resistance of 0 ? and a reverse resistance of infinite ohms.5. Explain the construction and working principle of an Energy meter for ac circuits. 6. An energy meter records one unit for every 660 revolutions of the disc. A load of 1000 watt hour is measured using this meter for 12 hours. The disc was found rotating at 10.2 revolutions per minute. Calculate the error involved in terms of units of energy. 7. Describe Gall potentiometer with a neat diagram and bring out its salient features.

UNIT 3 Assignment 1

1. Explain how to calibrate wattmeters using potentiometers. 2. How do current transformers differ from potential transformers. 3. A current transformer with a bar primary has 300 turns in its secondary winding. The resistance and reactance of the secondary circuit are 1.5 ? and 1.0 ? respectively. With 5 A flowing in the secondary winding, the magnetising mmf is 100 amperes and Iron loss is 1.2 Watts. Determine the ratio and phase angle error.4. Which bridge is used for measuring low resistances? Derive an expression for finding out the unknown low resistance under balanced condition. 5. With neat sketch, explain the operation of a megger.6. Explain the principle of loss of charge method for measurement of high resistance and derive an expression to find out the unknown resistance using this method.7. A 2.5 capacitor is charged to a potential of 450 volts. The capacitor is disconnected from the supply and the potential across the capacitor is observed using an electrostatic voltmeter. After 15.2 minutes the voltage has fallen to 280 V. This test is repeated using a resistance R in parallel with the capacitor. But now it took 10.8 minutes for the potential to fall from 450 V to 280 V. Determine the value of R.8. Explain with circuit diagram the bridge circuit that can be used to measure high voltages.

UNIT(4) Turorial 11. Explain the construction and principle of operation of a DC generator with neat sketch.2. (a) Derive the equation for induced EMF of a DC machine. (b) Derive the torque equation of DC motor.3. Describe the construction details of transformer and also explain the principle of operation. 4. (a) Derive the EMF equation of a transformer. (b) Explain the principle of operation of DC Motor.5. Explain the construction and principle of operation of single phase induction motor

UNIT(4) Assignment 1

1. Mention the difference between core and shell type transformers.2. What is the purpose of laminating the core in a transformer?3. Give the emf equation of a transformer and define each term.4. Define voltage regulation of a transformer5. How transformers are classified according to their construction?

UNIT(5) Turorial 1

1. A transformer with 40 turns on the high voltage winding is used to step down the voltagefrom 240V to 120V. Find the number of turns in the low voltage winding. 2. A 4 pole, wave wound generator having 40 slots and 10 conductors placed per slot. Theflux per pole is 0.02 wb. Calculate the generated emf when the generator is drive at 1200rpm. 3. A 25kw, 250V, dc shunt generator has armature and field resistances of 0.06ohm and100ohm respectively. Determine the total armature power developed when working (1) as a generator delivering 25 kw output and (2) as a motor taking 25kw.4. What is the function of capacitor in a single phase induction motor?5. What are the classifications of single phase induction motor based on the method ofstarting?UNIT(5) Assignment 1

1. The stator of a three phase, 8 pole, 750 rpm alternator has 72 slots, each of which having 10 conductors. Calculate the RMS value of the emf per phase if the flux per pole is 0.1 wb and the winding factor is 0.96. Also find the line Emf if the windings are connected in (i) Star, and (ii) Delta.2. A three phase star connected alternator driven at 900 rpm is required to generate a line voltage of 460 volts at 60 Hz on open circuit. The stator has 2 slots per pole per phase and 4 conductors per slot. Calculate (i) the number of poles, (ii) the useful flux per pole.3. A 4 pole, three phase, 50 Hz, star connected a.c. generator has 24 stator slots. Find the number of conductors per slot if the flux per pole is 62 mwb and the terminal voltage is 1100 volt. Assume full pitch coils.4. A 16 pole star connected alternator has 144 slots and 10 conductors per slot. The flux per pole is 30 mwb and the speed is 375 rpm. Find the frequency, the phase and line emfs.5. Find the number of armature conductors in series per phase required for the armature of a three phase 50 Hz 10 pole alternator with 90 slots. The winding is star connected to give a line emf of 11 Kv. The flux is 0.16 wb. Also find the voltage regulation if the terminal voltage on full load is 11.2 kv.