AC220V / DC48V / 20A Features: HET4820 high-frequency switching power supply rectifier module adopts advanced two-transistor forward switching technology, the use of isolation between modules designed to prevent mutual influence between modules, in the case of N + 1 backup, even if there is 1 or several module fails, does not affect the operation of other modules in parallel; inter-module enables automatic current; header type module using three and a half meter display, shows the output current and voltage, simple and practical. Module width of 19 ", height 2U standard chassis, easy to install. HET4820DX used to form the power supply system, HET4820EX module can be connected in parallel with the battery, without monitoring unit. 4820 technical parameters of the project measurement conditions MIN TYP MAX Unit input voltage range Output 53.5V / 20A 170 220.0 260 V power surge input 220V, 10 A full load output voltage range input 220V, continuously adjustable 42 53.5 58.5 V Output current input 220V, output 26.5V 20.0A dc output current limiting load inputs 220V 11A regulation Input 220V, Output 5% to 100% full load 0.5% grid regulation Input 170 ~ 260V 0.1 Output 53.5V / 20A 0.1% telephone balance weight noise input 220V, full load 300 ~ 3400HZ 2mV bee-peak noise input 220V, output 0 ~ 20MHZ 100mV full of broadband noise input 220V, output 53.5V / 20A 3.4 ~ 150KHZ 50mV 0.15 ~ 30MHZ 20mV noise discrete input 220V, output 53.5V / 20A 3.4 ~ 150KHZ 5mV 150 ~ 200KHZ 3mV 200 ~ 500 KHZ 2mV 0.5 ~ 30MHZ 1mV efficiency input 220V, 86 percent full load Dynamic Response 20% to 100% step load step 100us 80 ~ 150 V grid 100us Input protection (output 50% load) Overvoltage protection, shut off the output 264V power grid normal and restore output 250V output Overvoltage protection Overvoltage protection, shut off the output temperature coefficient 59.0V input 220V, full load 0.00021 / ℃ operating temperature above 40 ℃ is 50% of full load -10 + 50 ℃ Storage Temperature -40 + 85 ℃ MTBF 100,000 hours Weight 7.5Kg