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 50HzMax input current: AC 50AOutput voltage: AC 50~290V (adjustable)Output current: AC 0~25A (double)Power factor: 1~0.3Current period: 30sPower factor precision: +-0.02Its working environment should keep away from violent impact and vibration and air corrosion.