RCDs in welding systems

False tripping can be avoided by intelligent technology in welding systems

Unplanned shutdowns of parts of the installation lead to production losses and equipment damage, endanger process reliability and the quality of the goods to be produced. It is therefore important to use suitable protective devices to interrupt the power supply only in the event of actually existing fault currents. Furthermore, incipient residual currents should be detected at an early stage. Only those who keep an eye on their electrical installation can react in time without the protective device switching off. The high currents and/or high voltages generated during resistance welding often mean that conventional RCDs/residual current devices (such as RCCB, RCBO, CBR) cannot be used.

The short, pulsed and extremely high load currents and the system-related high-frequency leakage currents lead to false tripping and thus to unnecessary interruptions. Furthermore, conventional RCD solutions cannot be optimally adjusted to the installation.