LABORATORY MANUAL Basic Electrical Engineering Laboratory
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LABORATORY MANUAL Basic Electrical Engineering Laboratory Department of Instrumentation Engineering JORHAT ENGINEERING COLLEGE Assam-785007 Do’s Ø Be punctual, maintain discipline & silence. Ø Keep the Laboratory clean and tidy. Ø Leave your shoes in the rack outside. Ø Handle the equipment carefully. Ø Save all your files properly. Ø Come prepared with programs/algorithms/related manuals. Ø Follow the procedure that has been instructed. Ø Get the signature on experiment result sheet daily. Ø For any clarification contact faculty/staff in charge only. Ø Log off the system properly before switching off . Don’ts Ø Avoid unnecessary chat or walk. Ø Disfiguring of furniture is prohibited. Ø Avoid using cell phones unless absolutely necessary. Ø Do not use personal pen drives without permission. Ø Do not displace monitor, keyboard, mouse etc. Ø Avoid late submission of laboratory reports. EE102 BEE LABORATORY Semester I L-T-P 1 CREDIT 0-0-2 Experi Title of the Experiment Objective of the Experiment ment No. 1 Calibration of Ammeter To compare the readings of an Ammeter (M.C. or M.I.) with those of a substandard one and hence to draw the (a) Calibration curve (b) Correction Curve 2 Calibration of Voltmeter To compare the readings of a voltmeter (M.C. or M.I.) with those of a substandard one and hence to draw the a) Calibration curve (b) Correction Curve 3 Calibration of milli-voltmeter To calibrate a millivoltmeter as an ammeter with the help of a as Ammeter substandard ammeter and hence to draw the, (a) Calibration curve (b) Correction Curve 4 Verification of Thevenin’s To verify the Thevenin’s Theorem with the help of an Theorem electronic trainer. 5 Verification of Maximum To verify the Maximum Power Transfer Theorem with the help Power Transfer Theorem of an electronic trainer. 6 Power and Power Factor (Cos To measure the power dissipated in a single phase R-L circuit Φ) in a single phase R-L series and to calculate power and also to draw phasor diagram for each circuit. (3 voltmeter Method) reading and have to find the value of power factor from it. 7 Power and Power Factor in a To measure the power dissipated in a single phase R-L parallel single phase R-L Parallel circuit and to calculate power factor (Cos Φ) by three ammeter circuit. method. 8 Measurement of Power and To measure the power dissipated in a single phase R-L circuit power factor by wattmeter. with the help of a wattmeter and find power factor by measuring the voltage and current in the circuit. Text book Ø Electrical Machines, D P Kothari and R J Nagrath Student Profile Name Roll Number Department Year Student Performance Sl. No. Title of the Experiment Remarks 1 Calibration of Ammeter 2 Calibration of Voltmeter 3 Calibration of milli-voltmeter as Ammeter 4 Verification of Thevenin’s Theorem 5 Verification of Maximum Power Transfer Theorem 6 Power and Power Factor (Cos Φ) in a single phase R-L series circuit. (3 voltmeter Method) 7 Power and Power Factor in a single phase R-L Parallel circuit. 8 Measurement of Power and power factor by wattmeter. Office Use Checked and found ………………………………………………… Grade/ Marks ………………………………………………… Signature …………………………………………………… teacher class the of Signature _________________________ instrument? substandard by mean you do What iii. instruments? iron moving and coil moving the in errors various the are What ii. T S T Correction) vs (A and ) A vs (A Curve Correction and Calibration the Draw i. Report: S T A Ammeter Substandard ) A ( test under Ammeter Error - = No. S - T A A Correction Error Sl. of Reading Observation: Experimental No Maker’s Make Range Item No. Sl. Apparatus: of List A 5 , , Ω 35 35 Supply - Board DC Lamp Lamp V V 220 220 + A 3 3 - 0 A 3 3 - 0 A A - + - + Diagram: Circuit Curve Correction (b) curve Calibration (a) the draw . or M.I.) with those of a substandard one and hence to to hence and one substandard a of those with M.I.) or . (M.C Ammeter an of readings the compare To Objective: Experiment: the of Date Ammeter of Calibration Title: Student: the of No. Roll 1(a) No: Experiment supply. the off - Switch 6. zero. until steps different in lamps the off switching by meters the both in readings down Note 5. rheostat. the of the test ammeter. If full scale not covered then adjust adjust then covered not scale full If ammeter. test the of scale the of end the till steps in lamps the on Switch 4. supply. the on - switch then and initially zero be should meter the Both 3. position. maximum its to rheostat the keep also and position off in load lamp the Keep 2. figure. the in shown as circuit the onnect C 1. ammeter. of calibration for adopted be may procedures following The Procedure: calibration. outcome an as plotted are curve correction and calibration otherwise, correct, eading are same to the accuracy desired, then the meter under test can be taken is is taken be can test under meter the then desired, accuracy the to same are eading r two the f I test. under standard meter) and the value given by the meter meter the by given value the and meter) standard - sub (by measurement under quantity the of value actual the instrument is tested for its quality at the time of procurement. By calibration we mean to record the the record to mean we calibration By procurement. of time the at quality its for tested is instrument the rong results. Second, Second, results. w rong giving start it which to due detect fault/ some develop may instrument any industries The need of calibration arises out of two reasons. First, because of continuous use of laboratories/ laboratories/ of use continuous of because First, reasons. two of out arises calibration of need The standards. - sub as named be can standards of the users. These types types These users. the for made are which instruments the calibrate further to used are These standards: Working periodically. certify and calibration for laboratories national to sent are They industries. calibrated with the primary standards. They are maintained by involved involved by maintained are They standards. primary the with calibrated are These Standards: Secondary standards. secondary of calibration verification/ the remains laboratories. However the basic purpose of maintaining the primary standards standards primary the maintaining of purpose basic the However laboratories. national the outside purpose all over the world. These are available for calibration calibration for available are These world. the over all standards primary for figure average an out brings This laboratories. The result of measurements at various national laboratories are compared amongst themselves. themselves. amongst compared are laboratories national various at measurements of result The laboratories. rds. The primary standards are independently by absolute measurements at each of the national national the of each at measurements absolute by independently are standards primary The rds. standa National standards laboratories are responsible for keeping in maintaining the primary primary the maintaining in keeping for responsible are laboratories standards National standards: Basic Primary/ calibration. of purpose the for users These are not available to ordinary ordinary to available not are These Paris. at Measures and Weights of Bureau International at ned maintai by absolute measurement in terms of fundamental units. These international standards are kept and and kept are standards international These units. fundamental of terms in measurement absolute by the extent the production and measurement technology of the time allowed. These are periodically evaluated evaluated periodically are These allowed. time the of technology measurement and production the extent the al agreement. The standards are accurate to to accurate are standards The agreement. al internation an by defined are standards These Standard: International below, given are standards measuring of types various The Theory: teacher class the of Signature _________________________ Field. practical in experiment the of application the briefly Explain iii. T Correction) vs (V curve correction the Draw ii. S T ) V vs V ( Curve Characteristic the Draw i. Report: S T V voltmeter Substandard ) V ( test Under Error - = No. S - T V V Correction Error Sl. of Reading Observation: Experimental No Maker’s Make Range Item No. Sl. Apparatus: of List V 150 - 0 V 150 - 0 - - - A 4 . 1 Ω Ω 350 T V S V Supply V DC DC V 220 + + + Diagram: Circuit Curve Correction (b) curve Calibration (a) the draw . or M.I.) with those of a substandard one and hence to to hence and one substandard a of those with M.I.) or . C (M. voltmeter a of readings the compare To Objective: Experiment: the of Date Voltmeter of Calibration Title: Student: the of No. Roll ) 1(b No: Experiment supply. the off - Switch 6. zero. to up difference potential the decreasing by now meters the both in readings down Note 5. voltmeter. test the of scale the of end the till gradually difference potential the Increase 4. supply. the on - switch then and initially zero be should meter the Both 3. position. potential minimum its in divider potential the Keep 2. figure. the in shown as circuit the Connect 1. voltmeter of calibration for adopted be may procedures following The Procedure: teacher class the of Signature ________________________ eq Correction) vs (V curve correction the Draw ii. eq ) V vs mA ( Curve alibration C the Draw i. Report: Error - = (Volts) V No. - eq n eq V V =k.I V (mA) I Reading, Volt in Correction Volts in Error Volt Equivalent Reading, Voltmeter Sl. ammeter ammeter - Milli n I K Constant, Equivalent n V Observation: Experimental No Maker’s Make Range Item No.