Khulna University of Engineering & Technology Department of Electrical and Electronic Engineering Course No: EEE 1132 Course Title: Sessional on EEE 1131 Credits: 1.5 Course Teachers 1. Dr. Md. Habibullah Associate Professor of EEE 2. Md. Shafiul Islam Lecturer of EEE

Slide Courtesy Dr. Md. Jahirul Islam Assistant Professor Md Slide Courtesy Dr. Md. Jahirul Islam Assistant Professor Md. Masud Rana Dept. of Electrical and Electronic Engineering Khulna University of Engineering and Technology

Marks Distribution Attendance: 10% Lab Reports and Class Performance: 50% Quizzes: 20% Central Viva: 20% Total 100%

List of Experiments Exp. No Name of the Experiment 01 02 03 04 Familiarization with some electric meters and circuit equipment 02 Study of series and parallel circuit and verification of kirchhoff’s voltage and current law 03 Verification of ohm’s law and superposition theorem 04 Determination of Thevenin’s and Norton’s equivalent circuit

List of Experiments Exp. No Name of the Experiment 05 Determination of circuit parameters of an RLC series circuit 06 Determination of circuit parameters of an RLC parallel circuit 07 Determination of relationships between the line voltage and phase voltage, and the line current and phase current of a three phase system

List of Experiments Exp. No Name of the Experiment 08 Measurement of phase sequence of a three-phase system 09 Measurement of three phase power using two wattmeter method 10 Determination and correction of power factor of an ac system

Exp. No: 01 Exp. Name: Familiarization with some electric meters and circuit equipment. Circuit: A close conducting path through which an electric current either flows or intended to flow Electrical Parameters: The various elements of an electric circuit are called its parameter, like resistor, inductor, capacitor, voltage source, current source etc. Active Elements: Voltage source, Current source Passive Elements: Resistors, Inductors, Capacitors

Active Elements Voltage Source: A voltage source is a two terminal device which can maintain a fixed voltage. Current Source: A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. i.e. which can deliver a constant current.

Fig. Time-invariant and time-variant voltage and current sources Active Elements Current Source Current Source Fig. Time-invariant and time-variant voltage and current sources

Passive Elements Resistor: Ex: Incandescent Bulb, Variable Resistor Rating: Resistance, Tolerance, Power ratings Symbol: Resistor Variable resistor (Rheostat)

Passive Elements Inductor: Ex: Ballast or Choke Rating: Inductance, Current ratings Symbol:

Passive Elements Capacitor: Ex: Capacitor bank Rating: Capacitance, Voltage ratings Symbol: Capacitor Variable Capacitor

Electric Meter Different Electrical Meters for Measurement Purpose: Galvanometers Ammeters Voltmeters AVO meter (Commercially called Multimeter) Wattmeter

Ammeter A current measuring instrument Measures the amount of current flow through the circuit Ammeter is a low resistance device Ammeter is always connected in series with the branch whose current is to be measured

Connection Diagram of Ammeter

Ammeter Two types _ DC Ammeter _ AC Ammeter A DC ammeter is polarity marked with +Ve and –Ve sign The +Ve polarity of DC ammeter have to be connected to the current entering side of the circuit

This mark of straight line indicate DC ammeter Range Extension

This mark of straight line indicate AC ammeter Range Extension

Voltmeter have to be always connected across the load To measure electrical potential difference between two points in an electric circuit Voltmeter is a high resistance device Voltmeter have to be always connected across the load

Connection Diagram of voltmeter

Voltmeter Two types _ DC Voltmeter _ AC Voltmeter In a DC voltmeter the terminals are provided with polarity marking (+Ve and –Ve) To use DC voltmeter precaution should be taken about the polarity marking In an AC voltmeter there is no such polarity marking

This mark of straight line indicate DC voltmeter Range Extension

This mark of straight line indicate AC voltmeter

Multimeter It is also known as Electronic VOM or AVO meter Used to measure current, voltage and resistance both for AC and DC quantity, for a number of ranges Some multimeter provide the facilities of measuring inductance, capacitance, temperature Two type _ Analog AVO meter _ Digital AVO meter

Multimeter Analog Multimeter Digital Multimeter

Wattmeter To measure electric power in a circuit Wattmeter is generally four terminal device Two terminal are the end points of potential coil (P.C.) and the other two are current coil (C.C.)

Wattmeter Basic Wattmeter connection

Wattmeter Analog Wattmeter

Report Writing Objectives Introduction (Including Theoretical background) Apparatus Required Experimental Setup or Circuit Diagram Experimental Procedure Experimental Data Calculation Graphs or Vector Diagram (if any) Results Discussion Conclusion Question & Answer References

Report Writing Objectives Main purpose of the experiment have to be mentioned Ultimate learning from the experiment should be depicted Should be mentioned in points Introduction Mention introductory description and working principal of the experiment Theoretical background of the experiment have to note down

Report Writing Apparatus Required Equipment, which are used in the experiment, have to write down with their detail ratings and quantity Should be a tabular form Experimental Setup Circuit diagram of the experiment with all necessary electrical sign Name of the figure must be mentioned Example: Fig. (2.1): Pictorial view of ammeter

Report Writing Experimental Procedure Procedure to perform the experiment have to be noted according to the sequence of experiment done Should be mentioned in points Experimental Data Should be written in table Calculation Elaborate calculation of the whole work

Report Writing Graphical Representation Proper Scaling of axis Encircle the plotted data points Labeling (Units should be included) Figure No along with figure name should be mentioned

Report Writing Result & Discussion Most important part of a report Discuss your results Mention numerical values (if any). Compare the physically measured results with the theoretically calculated results If there is deviation between these results, then mention the scientific reasons for this deviation Give the description of graphical representation (if any) on the basis of theoretical background

Report Writing Conclusion Mention what are the learnings from this experiment Note down the advantages of this experiment in practical field Question & Answer Questions given at the end of each experiment, must be written with appropriate answer Reference Sources (Books, Journal etc.) , you have used to write the report, have to be mentioned

Book References Introductory Circuit Analysis By Robert L. Boylestad A Text Book of Electrical Technology, Volume I By B.L. Theraja and A.K. Theraja

THANKS TO ALL Md. Shafiul Islam Presented By Lecturer Department of Electrical and Electronic Engineering Khulna University of Engineering & Technology