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Power Systems

Polarization Index Test or PI Test

Polarization Index Test ( PI Value Test ) along with Insulation Resistance Test ( IR Value Test ) is conducted on HV electrical machine to determine service condition of the insulation. IP test is conducted especially to determine the dryness and cleanliness of the insulation. In insulation resistan

By Electrical4u 03/27, 2024
Power Systems

Transducer: Types of Transducers And What They Are

What is a Transducer? An electrical transducer is a device which is capable of converting physical quanties into a proportional electrical quantity such as voltage or electric current . Hence it converts any quantity to be measured into a usable electrical signal. This physical quantity which is to

By Electrical4u 03/27, 2024
Power Systems

AC Potentiometer

A potentiometer is an instrument which measures unknown voltage by balancing it with a known voltage . The known source may be DC or AC. The working phenomenon of DC potentiometer and AC potentiometer is same. But there is one major difference between their measurements, DC potentiometer only measur

By Electrical4u 03/27, 2024
Power Systems

Potentiometer: Definition, Types, And Working Principle

What is a Potentiometer? A potentiometer (also known as a pot or potmeter ) is defined as a 3 terminal variable resistor in which the resistance is manually varied to control the flow of electric current . A potentiometer acts as an adjustable voltage divider . How Does a Potentiometer Work? A poten

By Electrical4u 03/27, 2024
Power Systems

Measurement of Three Phase Power

Various methods are used for measurement of three phase power in three phase circuits on the basis of number of wattmeters used. We have three methods to discuss: Three wattmeters method Two wattmeters method Single wattmeter method . Let us discuss one by one each method in detail. Measurement of T

By Electrical4u 03/27, 2024
Power Systems

Electrodynamometer Type Wattmeter

Before we study the internal construction of electrodynamometer type wattmeter , it is essential to know the working principle of electrodynamometer type wattmeter. Dynamometer type wattmeter works on very simple principle and this principle can be stated as when any current carrying conductor is pl

By Electrical4u 03/27, 2024
Power Systems

Low Power Factor Wattmeter: What is it? (And Why is it Used)

What is a Low Power Factor Wattmeter? A low power factor meter is an instrument that is used to accurately measure low values of power factor. Before we study more about the low power factor meter , we need to understand why we need a low power factor wattmeter in the first place (as opposed to a st

By Electrical4u 03/27, 2024
Power Systems

Digital Frequency Meter

Digital frequency meter is a general purpose instrument that displays the frequency of a periodic electrical signal to an accuracy of three decimal places. It counts the number events occurring within the oscillations during a given interval of time. As the preset period gets completed, the value in

By Electrical4u 03/27, 2024
Power Systems

How to Use a Digital Multimeter?

Digital Multimeter is a device which has two words in its name: Digital and Multimeter. Let’s first try to analyze why do we have them there i.e. what do each of them actually convey which in turn helps us understand what does a multimeter do. The first word – digital – indicates that the meter has

By Electrical4u 03/27, 2024
Power Systems

How to Use a Digital Multimeter: A Complete Guide

A digital multimeter (DMM) is a versatile and essential tool for measuring electrical quantities such as voltage , current , resistance , capacitance , frequency, temperature, and more. It can also test the continuity and diode function of circuits and components. A digital multimeter can display th

By Electrical4u 03/27, 2024
Power Systems

Analog Multimeters

Multimeters as the name suggest the meters that we use to measure multiple quantities with the same instrument. The most basic multimeter measures voltage , current , and resistance . Since we use it for measuring current (A), voltage (V) and resistance (Ohm), we call it as AVO meter. We can categor

By Electrical4u 03/27, 2024
Power Systems

Flow Meter: What They Are & Types of Flow Meters

What is a Flow Meter? A flow meter is a piece of equipment used to measure the flow rate of solids, liquids, or gases. Flow meters can do this linearly, non-linearly, volumetrically, or on a weight basis. Flow meters are also known as flow gauges, flow indicators, or liquid meters. Types of Flow Met

By Electrical4u 03/27, 2024

Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

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Polarization Index Test or PI Test

Transducer: Types of Transducers And What They Are

AC Potentiometer

Potentiometer: Definition, Types, And Working Principle

Measurement of Three Phase Power

Electrodynamometer Type Wattmeter

Low Power Factor Wattmeter: What is it? (And Why is it Used)

Digital Frequency Meter

How to Use a Digital Multimeter?

How to Use a Digital Multimeter: A Complete Guide

Analog Multimeters

Flow Meter: What They Are & Types of Flow Meters

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