Log in Sign up

EX-303 Electrical Measurements and Instruments Notes

5 notes for Electrical Measurements and Instruments, unit by unit.

Unit 1 · Short notes Introduction, history and overview of measurement system; fundamentals of measurement system; static and dynamic characteristics of measurement systems; systematic characteristics; generalized model; transfer function; techniques for dynamic compensation; accuracy of measurement systems in steady state; measurement error; error probability function; error reduction techniques; reliability; choice and economics of measurement systems; loading effects due to shunt‑connected and series‑connected instruments; calibration curve; testing & calibration of instruments Introduction, history and overview of measurement systems · Fundamentals of measurement systems · Static and dynamic characteristics of measurement systems · Systematic characteristics and generalized model · Transfer function and techniques for dynamic compensation · Accuracy in steady state – measurement error and error probability function
Unit 2 · Short notes Galvanometers – theory, principle of operation and construction Ballistic galvanometer theory and construction · D’Arsonval galvanometer theory and construction · Definition and classification of analog and digital instruments · Operating principles of analog instruments, operating force, types of supports, damping and controlling mechanisms
Unit 3 · Short notes Different types of ammeters and voltmeters; digital instruments PMMC, moving iron (MI), electrodynamometer and induction ammeters & voltmeters · Expression for control and deflection torque, advantages, disadvantages and error sources · Extension of range using shunt and multiplier techniques · Digital voltmeter, digital ammeter, multimeter and wattmeter
Unit 4 · Short notes Instrument transformers Potential transformers (PT) and current transformers (CT) · Ratio and phase‑angle errors; testing procedures for instrument transformers · Differences between CT and PT; error reduction techniques
Unit 5 · Short notes Measurement of power Power measurement in AC and DC circuits · Electrodynamometer type wattmeter – construction, theory, operation and errors · Low power‑factor and UPF wattmeter · Double‑element and three‑element dynamometer wattmeter · Three‑phase power measurement – one‑, two‑ and three‑wattmeter methods · Reactive power measurement by single wattmeter method

More for EX-303

Electrical Measurements and Instruments subject page

Other 3rd semester EX subjects

All EX 3rd semester subjects