Welding primary windings adopts two-way water-cooled silicon-controlled rectifier control, ensure that current output balance, and reliable.
焊接初级回路采用双向水冷可控硅控制，保证电流输出平衡，可靠。
2
In the main circuit, the inverse parallel couple SCRs (silicon-controlled rectifier) are used as a electric switch, switching the transformer of resistance spot welding.