Shock Preventor for ENKA AC Transformer is an additional feature added to the machine’s electrical panel. Its main function is to lower the voltage output when machine is not being used. This function is almost similar to the VRD function in common inverter welding machines. Usage of this machine should adhere to the following regulations: Workplace Safety and Health (Shipbuilding and Ship-repairing) Regulation 2008 Part VII Clause 54.2 and Singapore Standard CP 88 Part 1:2001 (Amandment No. 1) Clause 5.8.4 (a).