Electrical Machines

Auto UPS Wiring for Partial Load – The Rest Load Depends on Main Power

Automatic UPS Wiring for Partial Load – Remaining Load Supplied by Main Power Suppose you have two light bulbs, one ceiling fan, and a 2 or 3-pin socket in the…
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Automatic UPS / Inverter Wiring Diagram Using One Live Wire

Automatic UPS System Wiring Diagram (One Live Wire & Standard Wiring) Automatic UPS / Inverter Connections In case of a power outage when utility supply from the grid is unavailable,…
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How to Connect Automatic UPS / Inverter to the Home Supply System?

Automatic Inverter / UPS System Connection & Wiring Circuit Diagram Introduction to Automatic Inverter / UPS Wiring Power failures and emergency breakdowns may occur at any time due to short…
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EMF Equation of an Alternator and Synchronous Generator

EMF Equation of an Alternator and AC Generator An alternator or synchronous generator (also known as AC generator or dynamo) is a device which converts mechanical energy into electrical energy. In…
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What is an Ideal Transformer? Circuit, Working & Phasor Diagram

Ideal Transformer and Practical Transformer Ideal Transformer An ideal transformer is an imaginary transformer with zero ohmic, magnetic leakage, copper and core losses. In other words, an ideal transformer is…
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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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