Induction type measuring instruments pdf

Methods of measurement based on agreed units and standards. A moving iron ammeter may be compensated for frequency errors by a. Measuring instruments inductor measuring instrument scribd. Electrical measurements pdf notes em pdf notes smartzworld. Video 31 this video is about an introduction and working principle of induction type measuring instrument. Induction type siqgle phase and three phase energy meter, compensation, creep.

Units of measurement and their standards, which is concerned with the establishment, reproduction, conservation and transfer of units of measurement and their standards. Pdf magnetic induction measurements in distribution transformer. Multiple choice questions and answers on measurement and instrumentation. A volt meter is an instrument used to measure the potential difference between the two points in an electric circuit. Multiple choice questions and answers on measurement and. Induction type energy meter ii electrical technology ii unit 3 s. Measurements and instrumentation questions and answers pdf 26. Dynamometer type wattmeter induction type wattmeter. The reaction between the rotating flux and the eddy current produced by it creates a torque which rotates the disc or drum. They retain their accuracy over wide range of temperature as well as loads. The main components of an induction instrument are a magnetic system, a movable part, and a permanent magnet. Induction type siqgle phase and three phase energy meter, compensation, creep, error, testing, frequency meters. They have high torque is to weight ratio as compared to other instruments. Basics of measuring instruments and types study buddy.

Study of single phase induction type energy meter or watt. Pdf in this project, the results of magnetic induction measurements into cores of distribution. Meters, double element and three element dynamometer wattmeter, errors and compensations, measurement of unknown resistance, method of measuring low, measurement of inductance, ballistic. The principle of working and construction of induction type meter is very simple. In the arrangement shown in fig a, a light aluminum piston is attached to the spindle that carries the pointer and moves with a very little clearance in a rectangular or circular air chamber closed at one end. Driving system moving system breaking system registering system. They are inexpensive as compared to moving iron type instruments. A website for electrical engineering education on machines,circuits,power systems,measurements,control systems,power electronics with projects online. Dynamometer and induction type energy meterinduction type instrument transformers. Induction measuring instruments are classified as singleflux or multiflux instruments, depending on the number of alternating magnetic fluxes inducing a current in the movable part of the instrument. Dynamometer and induction type energy meterinduction typeinstrument transformers.

Vibrating reed type, electrical resonance type moduleii 10 hours instrument transformers. Moving iron ammeters and voltmeters there are two basic forms of these instruments. The electrical measurements notes pdf em notes pdf book starts with the topics covering control and damping torques, design considerations type of p. Induction electrical measuring instrument article about. When the energy meter is connected in the circuit, the current coil carries the load current and the pressure coil carries the current proportional to the supply voltage. Induction type measuring instrument energy meter 1. Power factormeter synchroscope frequency meter digital. When a drum or disc of a non magnetic conducting material is placed in a rotating magnetic field, eddycurrents are induced in it. For the tf measurements the measuring instrument has been installed in. Following are the advantages of induction type meters. The damping torque in indicating instruments can be provided by. Movingiron ammeters and voltmeters there are two basic forms of these instruments. Principles of electrical measurement by slawomir tumanski.