The EK500A (DC48V) industrial frequency inverter power supply is a new generation of power supply and this series power supply is designed specially for the telecommunication systems and those systems that are sensitive to the interference against the power supply and require stable, reliable, purifying and uninterruptible AC power supply. The series power supply uses the high-performance microprocessor control, the high frequency IGBT inverter technology and the built-in AC bypass design, which is characteristic of such advantages as strong load adaptability, high reliability, low distortion and easy operation and maintenance.