As the control core of the whole smelting system ，medium frequency power supply unit has an unparalleled position. The level of manufacturing technology of medium frequency power supply system determines the power consumption and stability.

After years of development and continuous improvement of technology, SG mainly produce KGPS parallel resonant common medium frequency power supply and CL energy saving series resonant frequency power supply.

KGPS- Parallel resonance medium frequency power supply.
KGPS - Parallel resonance medium frequency power supply is the most widely used power supply in China. There are more than 4500 SG users in the use of this product. Its technology is very mature, simple structure、 easy maintenance and low fault rate, power factor can reach more than 0.93 in the melting. The main parts of the power supply unit: SCR, electrothermal capacitor, circuit breaker, reactor, main control circuit board, control transformer, pulse, etc.