How are shunts used in welders?

Shunts in welders are used to measure and control the current flowing through the welding circuit. By providing a low-resistance path, shunts allow for accurate current sensing without significantly affecting the circuit's operation. This data is crucial for adjusting the welding parameters to ensure optimal performance and quality of the weld. Additionally, shunts can help protect the welder from overload conditions by monitoring current levels.