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Electrical Basics

Motor Control Circuit Wiring

S Bharadwaj Reddy
A simple three-phase, 480 volt AC motor-control circuit is shown here, both in pictorial and schematic form. This entire assembly consisting of contactor, overload block, control power transformer, power fuses...

Motor Protection Circuits

S Bharadwaj Reddy
An essential component of any high-power motor control circuit is some device to detect a condition of excessive overload and interrupt power to the motor before thermal damage occurs. A...

How Motor Star Delta Starter Works ?

S Bharadwaj Reddy
Star-Delta starter is an electrical motor starting device, generally uses in big size motor to overcome high motor currents during starting. Star and Delta means here 2 separate states of...

Electrical Switches Principle & Types

S Bharadwaj Reddy
Electrical Switches have mechanical contacts or relays. These types of switches can control a wider range of current and voltage options. They are not affected by dirt, mist, magnetic fields...

Motor Inrush Current Measurements

S Bharadwaj Reddy
Why inrush current important ? Inrush current, sometimes known as starting current or locked rotor current in motors, can be four to 10 times higher than a motor’s running current....

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