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WELDER - CITS

MODULE 2 : Welding Techniques

Lesson 6&7 : Basic electricity applicable to arc welding

Objectives

At the end of this lesson you shall be able to
• define simple basic electricity
• define electric circuits, voltage, current, resistance, electric arc
• state basic electricity applicable to arc welding

Introduction

Arc welding is a versatile and widely used welding process that joins metals by melting them with the heat
generated from an electric arc. Understanding the basic principles of electricity is crucial for anyone engaging in
arc welding, as it forms the foundation for operating welding equipment safely and effectively.

Electricity is a kind of invisible energy which is capable of doing work such as –Burning of lamp.
Running of fan. Running of motor & machine, Producing heat, Creating an Arc. Electrical resistance of material.
Electrons in motion is called current. The rate of flow of electrons is measure in amperes. The measuring
instrument is called ampere meter, or ammeter.
1 Electric circuits
• Arc welding requires a closed electrical circuit consisting of a power source, welding electrode or wire, work
piece, and ground clamp.
• The power source supplies the necessary voltage and current for welding, creating a flow of electricity
through the circuit.

2 Static electricity
• This type electricity generate to by Friction.
• This type electricity not transfer one place to other place.so this not useable this type electricity.
• Current Electricity –Electrons motion is called current.

• This type current transfer one place to another place.

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