VRD testing on mma welders
What is a VRD
A built-in voltage reducing device (vrd) on an arc (mma) welder reduces the open circuit voltage (ocv) or no load voltage to a safe level. If the vrd functions correctly and is active, the ocv of the unit is limited to below 35V DC and thus reducing the potential of serious electric shock.
Australian Standard AS 1674
We test the ocv as per Australian Standard AS 1674 Safety in Welding and Allied Processes - Western Australia (Department of Mines, Industry Regulation and Safety) to ensure that it is within the safe parameter.
safety requirements
This standard sets out safety requirements for arc welding and allied processes, to reduce the possibility of electric shock and minimize associated hazards. It includes requirements for cable connections for alternating and direct current power sources, as well as requirements for hazard-reducing devices and other ancillary equipment.