# BE8254 Basic Electrical and Instrumentation Engineering Previous Year Question Paper

OBJECTIVES:

To impart knowledge on

• Operation of Three phase electrical circuits and power measurement
• Working principles of Electrical Machines
• Working principle of Various measuring instruments

### UNIT I   AC CIRCUITS AND POWER SYSTEMS

Three phase power supply – Star connection – Delta connection – Balanced and Unbalanced Loads- Power equation – Star Delta Conversion – Three Phase Power Measurement – Transmission & Distribution of electrical energy – Over head Vs Underground system – Protection of power system – types of tariff – power factor improvement

### UNIT II  TRANSFORMER

Introduction – Ideal Transformer – Accounting For Finite Permeability And Core Loss – Circuit Model Of Transformer – Per Unit System – Determination Of Parameters Of Circuit Model Of Transformer – Voltage Regulation – Name Plate Rating – Efficiency – Three Phase Transformers – Auto Transformers

### UNIT III   DC MACHINES

Introduction – Constructional Features– Motoring and generation principle – Emf And Torque equation – Circuit Model – Methods of Excitation and magnetization characteristics – Starting and Speed Control – Universal Motor

### UNIT IV  AC MACHINES

Principle of operation of three-phase induction motors – Construction –Types – Equivalent circuit, Single phase Induction motors -Construction– Types–starting and speed control methods. Alternator- working principle–Equation of induced EMF – Voltage regulation, Synchronous motors- working principle-starting methods -– Torque equation – Stepper Motors – Brush less DC Motors

### UNIT V   MEASUREMENT AND INSTRUMENTATION

Type of Electrical and electronic instruments – Classification- Types of indicating Instruments – Principles of Electrical Instruments –Multi meters, Oscilloscopes- Static and Dynamic Characteristics of Measurement – Errors in Measurement – Transducers – Classification of Transducers: Restive, Inductive, Capacities, Thermometric, piezoelectric, photoelectric, Hall effect and Mechanical

BE8254 Basic Electrical and Instrumentation Engineering Previous Year Question Paper for Regulation 2017 question paper Download

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