This machine is designed and manufactured to comply with the requirements of many standards, such as UL and IEC. It is used to perform the loading test of power plug, plug & receptacle, switch and so on. Technical parameter: Power source: AC 220V 50Hz Max input current: AC 50A Output voltage: AC 50~290V (adjustable) Output current: AC 0~25A (double) Power factor: 1~0.3 Current period: 30s Power factor precision: +-0.02 Its working environment should keep away from violent impact and vibration and air corrosion.