Note down the readings of voltmeter (V), Ammeter (I o) and wattmeter (P o). The transformer works on the principle of electromagnetic induction between two windings placed on a common magnetic circuit. Sum up the Ammeter readings (I1 and I2) , that should be equal to total current (I). 1 open circuit & short circuit test on a single phase transformer . 7 Theory: A transformer is a static device which transfers the electrical energy from one circuit to another circuit without any change in the frequency. 5. Electricity NEVER EXECUSES careless persons. LABORATORY PRACTICE SAFETY RULES 1. Upgrade to Prime and access all answers at a price as low as Rs.49 per month. 2. Connect the circuit diagram as shown in Figure 2. rejinpaul.com have taken efforts in providing the Regulation 2017 EEE Laboratory Manuals in PDF format. THEORY : The air-gap induced emf in an ac machine is given by 4. Apply rated voltage with the help of autotransformer across LV winding, with the HV winding as open circuited. > Electric Machinery by A. E. Fitzgerald (Sixth Edition) > > Electric Machines Analysis and Design Applying MATLAB by Jim Cathey (Chapter 2-7) > > Engineering Mechanics Dynamics Volume 2 by J. L. Meriam, L. G. Kraige (5th edition) > > Electric Machinery Fundamentals 4e by Stephen J Chapman > 2. 7. (in Watts) = Wattmeter Reading*M.F Short circuit current=Ammeter reading= I sc Voltmeter Reading = V sc Copper loss = Wattmeter Reading =W sc Calculate the values of R 01, X 01, Z 01. ELECTRICAL MACHINE LAB. High blood pressure or hypertension affects more people than one can possibly think. 3. 3 scott connection of transformers. Total Page 52 . SAFETY is of extreme importance in the Electrical Engineering Laboratories. 6. OBJECTIVE : To study the speed control of induction motor by varying supply frequency (V/f control). lab manual experiment names. As more and more doctors recommend people to use home blood pressure monitors to keep a regular check on their blood pressure readings at home, there is a common debate regarding which type of blood pressure testing machines are better – automated or manual blood pressure readings. Uploaded 3 years ago . DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING 13 14. (Electricity is a good servant but a bad master). 2. 3. Tech I Semester (JNTUA-R15) Mr. K. Raju,Assistant Professor CHADALAWADA RAMANAMMA ENGINEERING COLLEGE (AUTONOMOUS) Chadalawada Nagar, Renigunta Road, Tirupati – 517 506 Department of Electrical and Electronics Engineering 3. Make the connections as per the circuit diagram. Switch ON the supply to RPS. Note the readings of Ammeters. 1. Precautions: 1. MANUAL EE 591 Page | 6 EXPERIMENT NO: EM – II/2 TITLE SPEED CONTROL OF THREE PHASE SQUIRREL CAGE INDUCTION MOTOR BY VOLTAGE CONTROL AND FREQUENCY CONTROL METHOD. Electrical machines 2 lab manual 1. C TEST 1. 2. If we subtract loss corresponding to OA from Wo, then we get the no-load electrical and magnetic losses in the machine, because the no-load input Wo to the motor consists of (i) small stator Cu loss 3I o ² R 1 (ii) Stator core loss W c = 3 G o V c Fig – 1.2 SC Test on Single Phase Transformer 1.5 PROCEDURE: :O. Apply the voltage (say 5v) and note the Ammeter readings. 2. 2 sumpners test. So, practice with enough care and attention in handling electrical equipment and follow safety practices in the laboratory. LABORATORY MANUAL ON ELECTRICAL MACHINES - II LABORATORY 2018 – 2019 III B. USHA RAMA COLLEGE OF ENGINEERING & TECHNOLOGY EM-II LAB MANUAL Prepared by Mr. J Satish Babu & Mr. A. LokeshDEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING 1 ... Tabulate the readings as shown. Gradually increase the supply voltage in steps. The readings of the total power input are Wo, Io and voltage V are plotted. 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