Plug-type power, user the transfer switch to change the initial step coils adjust The welding voltage. Thus the performance is reliable and maintenance id very simple.

Today, the loads that are connected to the mains are more and more of the non linear type, which dramatically lowers the power and energy transfer to audio circuits.

The utility model has simple structure, and adopts gravity flow type cooling medium, thus having small power consumption, high heat transfer efficiency and cycle use.