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    20kVA Online UPS Uninterruptible Power Supply

    20kVA/16kW 3-Phase Online UPS Uninterruptible Power Supply, with LCD panel to display immediate, detailed working information, provides power source for critical electronics with backup battery to guarantee the device in stable and safe operation during power outages, thus avoid data loss.
    SKU: ATO-ST33 20KS
    Free shipping
    Delivery date: 6-12 days

    20kVA/16kW 3-Phase Online Uninterruptible Power Supply (UPS) provides power protections for critical electrical devices in the areas such as medical, financial, telecommunications, school, business and so on.
    UPS Features

    • DSP digital control technology
    • Environmentally friendly
    • Optimizing Tower form design, comparatively smaller size
    • Active input power factor correction (PFC)
    • Internal battery, easy to install
    • LCD panel displays opareting information clearly
    • Wide range of input voltage and frequency
    • One battery module for power supply, cost-effective


    Model ATO-ST33 20KS
    Nominal Voltage 380V AC
    Input Voltage Range 210V AC~475V AC (3PH+G)
    Input Frequency 40~60Hz(50Hz)/50~70Hz(60Hz)
    Input Power Factor >0.99
    Output Power Capacity 20kVA/16kW
    Nominal Output Voltage 380V AC
    Other Output Voltages 220VAC(1±1%)
    Voltage Distortion ≤5%
    Crest Factor 3:1
    Output Frequency Mains mode: synchronize with mains power (46-54Hz) or 50Hz (input frequency 40~46Hz or 54~60Hz);
    Battery mode: 50Hz
    UPS Topology On-line
    Waveform Type Sine wave
    Transfer Time 0ms
    Bypass Output (before turn-on) YES
    Output Connections 4-wire (3PH + G)
    Overload 105%±5%<load≤125%±5%: 1 min, then transfer to bypass and alarm;
    125%±5%<load≤150%±5%: 30s, then transfer to bypass and alarm;
    load>150%±5%: 300ms, then transfer to bypass and alarm.
    Type Maintenance-free Lead-Acid battery
    Battery Rated Voltage 192V DC
    Battery Quantity 16 pcs
    Typical Recharge Time 10 hrs
    Size (LxWxH) 710*260*717mm
    Weight 57.5kg
    Operating Temperature 0℃~40℃
    Operating Relative Humidity 20%~90%
    Noise( 1m from front panel) ≤60dB
    Communications & Management
    Communication Interface RS232
    Control Panel LCD display
    Audible Alarm Alarm once every 4 seconds during power outage; alarm once every second at distinctive low battery.
    Form Factor Tower
    Efficiency Up to 90%
    EMC ICE/EN/AS 62040-1; CISPR 22 Class A
    Surge Protection ICE/EN 62040-2, compliance with ICE/EN 61000-4-5

    Tips: There is no any display on the panel and UPS does not work after the starting up of UPS.
    Judging from the phenomenon, it is the fault of electric supply input, battery, and electric supply detection and battery voltage detection circuit.
    1. Check whether the electric supply input fuse is burned out.
    2. Check whether the battery fuse is burned out and whether the electric supply input fuse is OK. Because the UPS output and display will be shut down when some UPS cannot detect battery voltage.
    3. Check whether the electric supply detecting circuit is working normally if the battery fuse is OK. If it doesn’t work normally and UPS doesn’t has starting up function without electric supply, UPS output and display will be shut down. If the electric supply detecting circuit is working normally, please check whether the battery voltage detecting circuit is normal.

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