... AC 380V, 50Hz, 3-phase (others available uponrequest, like: 220V, 60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed ... AC 380V, 50Hz, 3-phase (others available uponrequest, like: 220V,60Hz, 3-phase) MCU for welding process, Model: AT89C52(ATMEL, USA)Welding power supplyDC 290 – 330VCompressed ...