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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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