Voltage reduction device (VRD)

The voltage reduction device (VRD) is a safety device used in welding equipment to reduce the open-circuit voltage below a certain voltage value. This reduces the risk of electric shock particularly in dangerous environments, such as closed or damp spaces. VRD may also be required by regulation in certain countries or regions.

The VRD function is used with MMA and Gouging modes only.

X3 FastMig is equipped with the voltage reduction device. By default, VRD is disabled. To enable the VRD function, it must be activated by installing an activation file on the X3 FastMig equipment following the USB update procedure (USB update). For more information, contact your local Kemppi representative.

For standalone MMA welding and gouging using only the X3 power source, if VRD is required, the VRD function must first be enabled following the activation process with the wire feeder connected.

When activated, the VRD voltage is 24 V with X3 FastMig. The VRD function cannot be disabled once it has been activated.