Induction type measuring instruments pdf

Video 31 this video is about an introduction and working principle of induction type measuring instrument. Vibrating reed type, electrical resonance type moduleii 10 hours instrument transformers. Moving iron ammeters and voltmeters there are two basic forms of these instruments. Methods of measurement based on agreed units and standards. A moving iron ammeter may be compensated for frequency errors by a. Pdf in this project, the results of magnetic induction measurements into cores of distribution. Potential and current transformers, ratio and phase angle errors, phasor. Measurements and instrumentation questions and answers pdf 26. Induction type siqgle phase and three phase energy meter, compensation, creep, error, testing, frequency meters.

Meters, double element and three element dynamometer wattmeter, errors and compensations, measurement of unknown resistance, method of measuring low, measurement of inductance, ballistic. Units of measurement and their standards, which is concerned with the establishment, reproduction, conservation and transfer of units of measurement and their standards. The main components of an induction instrument are a magnetic system, a movable part, and a permanent magnet. 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. For the tf measurements the measuring instrument has been installed in. Pdf magnetic induction measurements in distribution transformer.

Multiple choice questions and answers on measurement and instrumentation. Study of single phase induction type energy meter or watt. Dynamometer and induction type energy meterinduction typeinstrument transformers. Induction type energy meter ii electrical technology ii unit 3 s. They have high torque is to weight ratio as compared to other instruments. Multiple choice questions and answers on measurement and. When a drum or disc of a non magnetic conducting material is placed in a rotating magnetic field, eddycurrents are induced in it. They are inexpensive as compared to moving iron type instruments. They retain their accuracy over wide range of temperature as well as loads. Measuring instruments inductor measuring instrument scribd. Induction electrical measuring instrument article about. Air friction damping arrangements of air friction damping are shown in fig.

Induction type measuring instrument energy meter slideshare. Measuring instruments free download as powerpoint presentation. The damping torque in indicating instruments can be provided by. A volt meter is an instrument used to measure the potential difference between the two points in an electric circuit. Dynamometer and induction type energy meterinduction type instrument transformers. 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. A website for electrical engineering education on machines,circuits,power systems,measurements,control systems,power electronics with projects online. Power factormeter synchroscope frequency meter digital. Following are the advantages of induction type meters. Induction type siqgle phase and three phase energy meter, compensation, creep. Movingiron ammeters and voltmeters there are two basic forms of these instruments.

Power factormeter synchroscope frequency meterdigital. Basics of measuring instruments and types study buddy. Dynamometer type wattmeter induction type wattmeter. Induction type measuring instrument energy meter 1. The reaction between the rotating flux and the eddy current produced by it creates a torque which rotates the disc or drum. 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.