225amp tube IGBT , three phase High duty cycle stable arc,energy saving,economical INVERTER TECHNOLOGY OEM,CE Model: Three phase 250 amp tube IGBT ... performance reliability2. High frequency inverter, enhancing the welding efficiency and energy saving3. Easy for arc starting, little spatter, stable current ... using the machine, feel free to contact us! Three phase 250 amp tube IGBT Inverter arc welder