In this article, you will learn about four different types of damping systems namely air friction damping, fluid friction damping, eddy current damping and electromagnetic damping. Before going into the …
Continue ReadingDamping Systems – Air friction, Fluid Friction & Eddy Current Damping
The electrodynamometer is a transfer-type instrument. A transfer-type instrument is one that may be calibrated with a dc source and then used without modification to measure AC. This requires the …
Continue ReadingElectrodynamometer Instruments – Ammeter, Voltmeter and Wattmeter
The most common ammeters and voltmeters for laboratory or switch-board use at power frequencies are the moving iron instruments. These instruments can be constructed to measure current and voltage to …
Continue ReadingMoving Iron Instruments – Attraction and Repulsion Type
The permanent magnet moving coil instrument is the most accurate type of DC measurement. It is one of the two types of moving coil instruments used to measure dc work …
Continue ReadingPermanent Magnet Moving Coil (PMMC) Instrument
Inductors are electrical components that oppose the flow of alternating current (AC) by temporarily storing energy as magnetic fields. The action of an inductor is known as Inductance. This article …
Continue ReadingInductors and Inductance : Working, Unit, Function, Types and Uses
This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The power in a three phase load can be measured by …
Continue ReadingMeasurement of Three Phase Power | Wattmeter Methods
A current transformer (CT) is a type of transformer that is used to measure AC current. It produces an alternating current (AC) in its secondary which is proportional to the AC …
Continue ReadingCurrent Transformer (CT) – Construction and Working Principle
As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed as low voltage switchgear. The term ‘switchgear’ is a generic term …
An analog instrument is one in which the output or display is a continuous function of time and bears a constant relation to its input. The analog instruments find extensive …