This system makes use of the characteristic of low duty cycle of spot welder to limit the general energized capacity of a spot welder group at any time within a pre-set limit.

• 本系统利用点焊机负载持续率低的特点，根据预定的限值，对同时通电焊机总容量进行限制，从而稳定了电网电压及焊接电流，保证了点焊机群的焊接质量。