What is Arc Voltage in Welding?

Arc voltage is the difference in electrical potential between the electrode and the workpiece. It is an important factor in welding, as it determines the amount of heat input into the weld.

Too much arc voltage can cause excessive heating, leading to warping or melting of the metal.
Too little arc voltage can result in cold welding, which can be just as damaging.

The ideal arc voltage is one that strikes a balance between these two extremes, allowing for a strong and sturdy weld.

Arc voltage formula

Arc voltage = electrode voltage – workpiece voltage

The arc voltage can be measured with a voltmeter. It is typically between 15 and 30 volts.

What is Restriking voltage and arc voltage?

Restriking voltage is the voltage at which an arc can be reestablished after being interrupted.
Arc voltage is the voltage required to maintain an arc.

The two are different because the restriking voltage is generally much higher than the arc voltage.

The difference between arc voltage and restriking voltage is important to understand because it can help welders troubleshoot problems with their welding equipment.

What is an arc in a power system?

An arc is an electrical discharge that occurs when the voltage across a gap exceeds the dielectric strength of the surrounding medium. Arcs can occur between two conductors, such as in welding, or between a conductor and a ground.