The conducted immunity test for resistance welding equipment is a core electromagnetic compatibility (EMC) test. It verifies the ability of resistance welding equipment (including spot welding, seam welding, projection welding, etc.) to resist radio frequency interference signals intruding through power cables, control cables and signal cables in industrial power grid environments.

This test prevents problems such as welding parameter drift, false program triggering and system downtime caused by power grid harmonics and electromagnetic interference from surrounding industrial control equipment, so as to ensure the stability of the welding process and the consistency of welding quality.

Resistance welding equipment is widely used in highly interfered industrial scenarios such as automobile manufacturing and home appliance sheet metal fabrication. Strong interference sources like inverters and servo drivers are commonly present nearby. Therefore, conducted immunity testing is a critical part of its industrial compliance certification.