Dc Crompton Potentiometer Pdf
UNIT-I Measuring Instruments Classification – deflecting, control and damping torques – Ammeters and Voltmeters – PMMC, moving iron type instruments – expression for the deflecting torque and control torque – Errors and compensations, extension of range using shunts and series resistance. Electrostatic Voltmeters-electrometer type and attracted disc type – Extension of range of E.S.
UNIT –II Instrument transformers CT and PT – Ratio and phase angle errors – design considerations Type of P.F. Meters – dynamometer and moving iron type – 1-ph and 3-ph meters – Frequency meters – resonance type and Weston type – synchroscopes. UNIT –III Measurement of Power Single phase dynamometer wattmeter, LPF and UPF, Double element and three element dynamometer wattmeter, expression for deflecting and control torques – Extension of range of wattmeter using instrument transformers – Measurement of active and reactive powers in balanced and unbalanced systems. UNIT –IV Measurement of Energy Single phase induction type energy meter – driving and braking torques – errors and compensations – testing by phantom loading using R.S.S. Three phase energy meter – trivector meter, maximum demand meters. UNIT – V Potentiometers Principle and operation of D.C.
Kenny g album download. Crompton’s potentiometer – standardization – Measurement of unknown resistance, current, voltage. Potentiometers: polar and coordinate types standardization – applications. UNIT – VI Resistance Measurements Method of measuring low, medium and high resistance – sensitivity of Wheatstone’s bridge – Carey Foster’s bridge, Kelvin’s double bridge for measuring low resistance, measurement of high resistance – loss of charge method. UNIT –VII A.C. Bridges Measurement of inductance, Quality Factor – Maxwell’s bridge, Hay’s bridge, Anderson’s bridge, Owen’s bridge. Measurement of capacitance and loss angle – Desauty bridge. Wien’s bridge – Schering Bridge.
UNIT – VIII Magnetic Measurements: Ballistic galvanometer – equation of motion – flux meter – constructional details, comparison with ballistic galvanometer. TEXT BOOK: Electrical Measurements Notes – EM Notes – EM Pdf Notes. Electrical Measurements and measuring Instruments – by E.W.
Golding and F.C. Widdis, fifth Edition, Wheeler Publishing. Electrical & Electronic Measurement & Instruments by A.K.Sawhney Dhanpat Rai & Co. REFERENCE BOOKS: Electrical Measurements Notes – EM Notes – EM Pdf Notes. Electrical Measurements – by Buckingham and Price, Prentice – Hall. Electrical Measurements by Harris. Electrical Measurements: Fundamentals, Concepts, Applications – by Reissland, M.U, New Age International (P) Limited, Publishers.
Dc Motor Potentiometer
Potentiometer Pdf Download
Note:- These notes are according to the r09 Syllabus book of.In R13,8-units of R09 syllabus are combined into 5-units in r13 syllabus.