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The KEPUNI XD-GH400 is a 400A automatic girth welding power supply independently developed for TIG girth welding. Integrates welding machine core, control module, arc voltage tracking, torch swinging, integrated wire feeding, circulating cooling water tank, printer module, IoT module, and USB interface. Current range 5-400A, heavy duty cycle 310A 100%/400A 60%, rated power 18KVA, input 380V±10% 50Hz. PLC+DSP dual control mode with industrial touch screen and manual control box. Memory 200 groups