Produce sparks, special high-frequency electronic circuits automatically cut off to protect the electrodes and products.
2, the protection device:

Over-current, the case of load current automatic protection relay din oscillator tubes and rectifiers.
3, Duty Cycle stability:
This machine adopts international industrial band Oscillation Frequency 27.12MHz or 40.68MHz, the output Duty Cycle stability, in line with international standards, suitable for use around.