Electrical Machines

Will a DC Shunt Motor Operate on an AC Supply?

What Happens if We Connect a DC Shunt Motor to the AC Supply? The Shunt winding has a large number of turns so that it has appreciable inductance. When A.C…
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Difference Between Power and Distribution Transformer

Main Difference Between Power Transformer and Distribution Transformer The working principle of all transformers is the same i.e. electromagnetic induction whereas design, function, purpose of applications and winding configurations differentiate…
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Sizing Motors FLC, HP, Voltage, Breaker Size and Wire Size

How to Size Motor HP, Input Voltages, Full Load Current (FLC), Breaker Size, And Copper Wire Size for Single Phase & 3-Phase Motors Motor load circuits are significantly different from…
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Transformer Nameplate Data – Explain the Rating and Features

General Requirements of a Transformer Nameplate to Show the Characteristics Following are the minimum information and data printed on a transformer nameplate from the designer and manufactures. The standards require…
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Why are Generators and Alternators Rated in kVA, Not in kW?

Why is an Alternator or Generator Rated in kVA, Not in kW? As we already know why a transformer is rated in kVA instead of kW, the same principle applies…
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Why is a Transformer Rated in kVA, but Not in kW?

Why are Transformers Always Rated in kVA Instead of kW? As the name suggests, a transformer only transfers power from one circuit to another without changing the value of power and…
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Automatic Star-Delta Starter using Timer – Power, Control & Wiring Diagrams

Starting & Controlling of 3-Phase Motors Using Automatic Star-Delta Starter (Y-Δ) A Star-Delta starter is an electromechanical device used to start and control the speed of a three-phase induction motor.…
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Why Do We Need to Install a Starter with a Motor?

Why Do We Need to Connect a Starter with Electrical Motors? Essential and Need of Starter with Motor A starter is a device used in motors to start and accelerate.…
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A Simple Circuit Diagram of Contactor with Three Phase Motor

A Simple Circuit Diagram of Contactor with Three Phase Motor
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Applications of Transformers

Uses and Applications of Transformers The operating principle of all kinds of transformers designed for different applications are the same e.g. electromagnetic induction whereas the applications of transformers are different…
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