JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisites

Measurements and Instrumentation

Course Objectives:

• To calibrate Watt, Energy and PF Meter and determination of three phase active & reactive powers.
• To determine unknown inductance, resistance, capacitance by performing experiments on D.C Bridges & A. C Bridges.
• To determine the ratio and phase angle errors of Instrument transformers.

Course Outcomes

After learning the contents of this paper the student must be able to

• Choose and test any measuring instruments.
• Find the accuracy of any instrument by performing experiments.
• Calculate the various parameters using different types of measuring instruments.

Course Objectives Program Outcomes

PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 To calibrate Watt, 3 3 3 3 3 3 1 1 2 2 1 3 Energy and PF Meter and determination of three phase active & reactive powers. To determine 3 2 3 2 3 3 2 2 2 3 2 3 unknown inductance, resistance, capacitance by performing experiments on D.C Bridges & A. C Bridges. To determine the ratio 3 2 3 1 3 3 1 1 2 2 2 3 and phase angle errors of Instrument transformers

Course Outcomes Program Outcomes

PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 Choose and test any 3 3 3 3 3 3 3 1 2 1 1 2 measuring instruments Find the accuracy of 3 3 3 3 3 3 3 3 3 3 2 3 any instrument by performing experiments Calculate the various 3 2 2 2 3 3 3 2 1 3 3 2 parameters using different types of measuring instruments

The following experiments are required to be conducted as compulsory experiments:

• 1. Calibration and Testing of single-phase energy Meter.
• 2. Calibration of dynamometer power factor meter.
• 3. Crompton D.C. Potentiometer – Calibration of PMMC ammeter and PMMC voltmeter.
• 4. Kelvin’s double Bridge – Measurement of resistance – Determination of Tolerance.
• 5. Dielectric oil testing using H.T. testing Kit.
• 6. Schering Bridge & Anderson Bridge.
• 7. Measurement of 3 - Phase reactive power with single-phase wattmeter.
• 8. Measurement of displacement with the help of LVDT. In addition to the above eight experiments, at least any two of the experiments from the following list are required to be conducted:
• 1. Calibration LPF wattmeter – by Phantom testing.
• 2. Measurement of 3-phase power with single watt meter and two CTs.
• 3. C.T. testing using mutual Inductor – Measurement of % ratio error and phase angle of given CT by Null method.
• 4. PT testing by comparison – V. G. as Null detector – Measurement of % ratio error and phase angle of the given PT
• 5. Resistance strain gauge – strain measurements and Calibration.
• 6. Transformer turns ratio measurement using AC bridges.
• 7. Measurement of % ratio error and phase angle of given CT by comparison.

TEXT BOOKS:

• 1. A. K. Sawhney, “Electrical & Electronic Measurement & Instruments”, Dhanpat Rai & Co. Publications, 2005.
• 2. Dr. Rajendra Prasad, “Electrical Measurements & Measuring Instruments”, Khanna Publishers 1989.

REFERENCE BOOKS:

• 1. G. K. Banerjee, “Electrical and Electronic Measurements”, PHI Learning Pvt. Ltd., 2nd Edition, 2016.
• 2. R. K. Rajput, “Electrical & Electronic Measurement & Instrumentation”, S. Chand and Company Ltd., 2007.
• 3. S. C. Bhargava, “Electrical Measuring Instruments and Measurements”, BS Publications, 2012.
• 4. Buckingham and Price, “Electrical Measurements”, Prentice – Hall, 1988.
• 5. Reissland, M. U, “Electrical Measurements: Fundamentals, Concepts, Applications”, New Age International (P) Limited Publishers, 1st Edition 2010.
• 6. E.W. Golding and F. C. Widdis, “Electrical Measurements and measuring Instruments”, fifth Edition,Wheeler Publishing, 2011.