HD22020-3, input voltage: 323V to 475V (three-phase three-wire), the input current ≤ 15A AC input frequency: 45Hz ~~ 65Hz ≥ 93% efficiency, power factor: 0.94, output voltage range: 176V ~~ 320V, rated output current: 20A, maximum output current: 21A, soft-start time: 3 to 8 seconds, constant current output range: 10% to 100%, steady flow accuracy (20% of the current limit) ≤ ± 0.5% ≤ 0.1%, ripple factor regulation accuracy ≤ ± 0.5%, current unbalance degree ≤ ± 5% (typical value of 3%, 50% to 100% of rated load), audio noise 10MΩ, dielectric strength, input, output terminal shorted applied between the input / output terminal and housing 50Hz, the effective value of 2000V AC voltage of 1 minute, no breakdown or flashover phenomenon; EMC, electrostatic discharge immunity requirements: GB / T 17626.2-1998 Table 2 Level 3 Sasser immunity requirements: GB / T 17626.12-1998 Table 2 Level 3, interference of conduction Radiation: EN 55022 Class A, fast transient burst immunity resistance: GB/T17626.4-1998 Level 3 anti-surge the interference requirements: GB/T17626.5-1998 Level 3, the the conducted disturbances caused by the RF field induction immunity requirements: GB/T17626.5-1998 Level 3 power frequency magnetic field immunity requirements: GB/T17626.8 -1998 Level 4, the damping oscillatory magnetic field immunity: GB/T17626.10-1998 Level 4, the RFEMS: GB/T17626.3-1998 Level 3, voltage dips, short interruptions and voltage gradient anti- interference requirements of IEC61000-4-11, 95% 0.5 Period> 30% 25> 90% 250 Period Period, Operating Temperature: -10 ℃ to 40 ℃ Storage Temperature: -25 ° C to 55 ° C, relative humidity ≤ 95 %, atmospheric pressure of 70 to 106kPa of mechanical parameters, dimensions (length × width × height) (Unit: mm), 466 × 139 × 288 Weight: 15kg. HD22010-3 / HD11020-31. Protection functions: 1) input over / undervoltage protection: the module has input over / undervoltage protection function. 313 ± 10Vac input voltage is less than or greater than 485 ± 10Vac module protection, DC output protection indicator (yellow) light. Module automatically return to work after the voltage is restored to 335 ± 10Vac ~ 460 ± 15Vac. 2) Output overvoltage / undervoltage alarm, output overvoltage protection, undervoltage alarm function module. When the output voltage is greater than 293 ± 6Vdc module protection, DC output protection indicator (yellow) light. The module does not automatically restore module must be re-power on after power failure. When the output voltage is less than 198 ± 1Vdc module alarm, DC output protection indicator (yellow) light. Voltage is restored, the module output undervoltage alarm disappears. 3) short-circuit retraction module has a short-circuit retraction. When the module output short circuit, output current is not greater than 40% of the rated current. Short circuit factors excluded, the module automatically return to normal output. 4) phase protection module has a lack of protection. When the input phase, the module limits the power output. Output voltage, output current of 10A 260V. 1) over-temperature protection module air inlet is blocked or ambient temperature is too high module internal temperature exceeds a set value, the module will be over-temperature protection, the protection of the module panel indicator (yellow) light, voltage output module . When there is an abnormal condition is cleared, the temperature inside the module back to normal, the module will automatically revert to normal work. 2) the primary side overcurrent protection: overcurrent module rectifier module protection under abnormal conditions. The module does not automatically restore module must be re-power on after power failure. 3) fan temperature control: temperature and current joint control fan rotation module. Fan speed is divided into a stall, half turn and full turn third gear, fan speed control through comprehensive consideration of the output current and module temperature control. 4) failure: the module alarm information to the fault code in the form of real-time on the LED flashes. The LED display would read the fault code, press the display toggle button voltage. The fault code is shown in the following table. 5) communication function: modules can be RS485 mode with the host computer communication. Module output voltage and current, the module protection and alarm information is sent to the host computer, to accept and carry out the control commands issued by the host computer.