Large -scale welding machine protection switch board

The utility model belongs to the technical field of steel rolling, a large -scale welding machine protection switch board is disclosed, include: the cabinet body and setting are in internal voltage detection circuit, field controller, relay control circuit, relay switch, power connection board, external power circuit and the stand -by power supply of cabinet, the power connection board passes through relay switch with external power circuit and stand -by power supply link to each other, relay control circuit with relay switch links to each other, voltage detection circuit respectively with theexternal power circuit and stand -by power supply links to each other, field controller respectively with voltage detection circuit and relay control circuit links to each other. The utility model provides a promote the switch board of the continuous job stabilization nature of large -scale welding machine. 本实用新型属于轧钢技术领域，公开了种大型焊机保护控制柜，包括：柜体以及设置在所述柜体内的电压检测电路、现场控制器、继电器控制电路、继电器开关、电源接线板、外部供电电路以及备用电源；所述电源接线板通过所述继电器开关与所述外部供电电路