... up to 50%. Invert frequency up to 100KHZ, high speed of dynamic response, easy arc starting, steady arc, anti interference, ... deep welding pool, good quality. Good trust adjustment, anti sticking of welding rod, suited for all kinds’acid and alkaline welding ... Power factor0.93 Rank of insulationF Rank of protectionIP23 Weight (kg)7 Dimensions (mm)290×132×216 professional supplier of ARC series welding ...