- Артикул:00-01106139
- Автор: S. Kamakshaiah, Pannala Krishna Murthy, J. Amarnath
- ISBN: 978-93-89447-52-1
- Обложка: Твердая обложка
- Страниц: 539
- Год: 2019
- Вес: 1496 г
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Издание на английском языке
The book covers the basic concepts of electrical measurements, providing students with a clear and accessible explanation of the subject. The author, who has extensive teaching experience, shares knowledge about various types of measuring instruments, methods for measuring power and resistance, and analyzes transformers and magnetic measurements. Each section contains solved examples, which helps students confidently master the material and develop problem solving skills in the field of electrical measurements. The book serves as a valuable resource for both students and practicing engineers seeking to improve their knowledge in this field.
Contents
Foreword-
Preface
1. Measuring Instruments
1.1 Introduction.
1.2 Classifications of Measuring Instruments
1.3 Effects Used in Measuring Instruments
1.4 Indicating Instruments
1.5 Constructional Details of Indicating Instruments
1.6 Classification of Indicating Instruments According to Limiting Error Solved Examples Pcricir (Questions
2. Indicating Instruments
2.1 Introduction.
2.2 Ammeters and Voltmeters
2.3 Moving Iron Instruments
2.4 Moving Coil Permanent Magnet Type (PMT)
2.6 Thermocouple Instruments
2.7 Induction Tvpe Instruments
2.8 .Hot Wire Instruments
2.9 Electrostatic Type
2.10 Power Eactor Meters
2.11 Synchroscopes
2.12 Measurement of Frequency
Solved Examples
Review (Questions
Exercise Problems
3. Instrument Transformers
3.1 Introduction.
3.1.1 Advantages of Instrument Transformers as Compared with Shunts and Multipliers
3.2 Current Transformer
3.3 Calculation of Ratio and Phase Angle Errors in Current Transformer
3.3.1 Phase Angle
3.4 Design Considerations
3.5 Characteristics of Current Transformers
3.6 Effect of Frequency
3.7 Effect of Open Circuiting the Secondary Side of C.T.
3.8 British Standard Specifications
3.9 Method of Compensation for Phase Angle
3.10 Potential Transformer
3.11 Testing of Instrument Transformers
Solved Examples
Review (Questions
Exercise Problems
4. Measurement of Power
4.1 Introduction
4.2 Types of Wattmeters
4.3 Phase Compensation
4.4 Expression for Torque in Terms of Mutual Inductance
4.5 Compensation for In.ductan.ce of the Pressure Coil
4.6 Errors in Wattmeter Reading
4.7 Compensation for Loss in Pressure Coil
4.8 Use of Instrument Transformers with Wattmeters and Errors
4.9 Ferrodynamic or Iron Core or Iron Clad Wattmeters
4.10 Electrostatic Tope of Wattmeters
4.11 Measurement of Power
4.12 Measurement of Reactive Power in a Balanced Load by 1-Wattmeter Method
Solved Examples
Review (Questions
Exercise Problems
5. Supply Meters
5.1 Introduction.
5.2 Types of Energy or Supply Meters
5.3 D.C. Supply Meters (A..H..Meters)
5.4 .Ferranti Ampere Hour Meter (D.C.)
5.5 Magnetic Shunt
5.6 Temperature Errors
5.7 Self-Heating Errors
5.8 Chamberlain and Hookham Direct Current A.H. Meter
5.9 Effects of Variation of Temperature
5.10 Watt-Hour Meters
5.11 Testing of D.C. Supply Meters
5.12 1-ф A.C. Energy Meter
5.13 Errors Due to Change of Frequency
5.14 Errors Due to Change in Temperature
5.15 Comparison of 1-ф Energy Meters
5.16 Classification of 1-ф Energy Meters
5.17 Testing of A.C. Supply Meters
5.18 Registering Mechanism
5.19 3-ф Energy Meters (Induction Type)
5.20 Sine or Reactive Meter
5.21 In.flueu.ce of P.F on the Cost of Energy
5.22 kVAh Meter for Restricted Range of Power Factor
5.23 kVAh Meters for P.F. Range Between U.P.F to Zero
5.24 Landis and Gyr Trivector Meter
5.25 Westing House Type
5.26 Maximum Demand Indicators
5.27 Testing Procedures for 1-o Energy Meter
Solved Examples
Review (Questions
Exercise Problems
6. Potentiometers
6.1 Introduction
6.2 D.C. Potentiometer
6.3 Comparison of EMFs
6.4 Standards of E.M.F
6.5 Ayrton Universal Shunt
6.6 Volt Ratio Box
6.7 Accurate Forms of D.C. Potentiometers (Crompton Potentiometer)
6.8 Tin.sl.ey Vernier Poten.tiom.eter
6.9 Brook’s Deflection Potentiometer
6.10 Galvanometer
6.11 Applications of Potentiometers
6.12 Poten.tiom.eter Analysis
6.13 Analysis of Potentiometer Errors
6.14 Galvanometer Sen.sitivj.ty Limitations
6.15 A.C. Poten.tiom.eter
6.16 Drysdale Polar Poten.tiom.eter
6.17 How to Use Poten.tiom.eter
6.18 Gall-Tinsley Coordinate Potentiometer
6.19 Measurement of Unknown A.C. Voltage
6.20 Applications of A.C. Potentiometers
Solved Examples
Review (Questions
Exercise Problems
7. Measurement of Resistance
7.1 Introduction
7.2 Measurement of Low Resistance
7.3 Measurement of Medium Resistance
7.4 Measurement of High Resistan.ce
7.5 Surface and Volume Resistivity of a Material
7.6 Ohmmeter
7.7 Simple Methods of Measurement of Inductance and Capacitance
7.8 Measurement of Capacitance
7.9 Bridges
7.10 D.C. Bridges
7.10.2 Kelvin Double Bridge
7.10.3 Carey-Foster Slide Wire Bridge
Review (Questions
8. A.C. Bridges
8.1 Introduction.
8.2 Ratio Arm Bridge
8.3 Product Arm Bridge
8.4 Maxwell’s Inductance Bridge
8.5 Hay’s Bridge for Measurement of Inductance
8.6 Anderson Bridge
8.7 Owen’s Bridge
8.8 Heaviside Bridge
8.9 Campbell’s Modification of the Heaviside Bridge
8.10. Heaviside Campbell-Equal Ratio Bridge
8.11 Measurement of Capacitance by De Sauty Bridge
8.12 Wien’s Bridge
8.13 Schering Bridge
8.14 Wagner’s Earth Connection
Solved Examples
Review (Questions
Exercise Problems
9. Magnetic Measurements
9.1 Introduction
9.2 D.C. Tests
9.3 Ballistic Galvanometer
9.4 Measurement of .Flux by Ballistic Galvanometer
9.5. Flux. Meter
9.6 Determination of a B.H Curve of a Specimen
9.7. Hysteresis Loop (B.H. Loop) Method of Reversals
9.8 Ballistic Tests using .Flux Meter
9.9 B.H Curve for Bar Specimen
9.10 Fahy Simplex. Permeameter
9.11 Other Methods of Measuring Magnetic .Field Intensity
9.11.1 Use of Search Coil
9.11.2 Bismuth Spiral
9.11.3 Magnetic Bal.an.ce
9.11.4 Magn.etom.eter (Gauss Meter)
9.11.5 Deflecting Coil
9.11.6 Hall Effect
9.12 Magnetic Testing with A.C
9.12.1 Separation of Iron Losses
9.12.2 Determination of Loss by Wattmeter
9.13 Measurement of Iron Loss by A.C. Potentiometer
Solved Examples
Review (Questions
Exercise Problems
Multiple Choice (Questions
Index
5.0
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