... frequency(720Hz) generator Integrated coaxial design. H200BT engine driven welding machine 1. Welding property: adopt revolving magnetic field, adjust the ... 3. Generator: Patented technology of 12 antipodal, 720Hz. Power supply is intermediate frequency, no transformer is needed, and it can ... be used 72 hours non stop.4. Auxiliary power supply: 3KW DC 220V output can satisfy lighting, angel grinder, ...