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    8 kVA 3 phase AC Automatic Voltage Stabilizer

    5 out of 5 based on 3 reviews | Write a review
    Buy 8 kVA automatic voltage stabilizer with cheap price, default 304V-456V AC wide input voltage (+/- 20% tolerance) and 380V output, other output voltages can be customized. LED dispaly, IP24 level for protection, used in three phase four line system where stable voltage is required.
    30-day Returns
    Delivery date: 10-20 days

    Fully industrial AC automatic voltage stabilizer with 8 kVA rating capacity, ±20% tolerance of input voltage range, 3 phase 380V, 415V, 480V output for selection. As highly compact and virtually maintenance free solutions, they are perfectly suited for industrial and commercial buildings and their associated applications and processes.

    8 kVA Voltage Stabilizer Specifications

    Model Number ATO-TNS/JSW-8K
    Capacity 8 kVA (The power capacity of voltage stabilizer needs to be 1.5~2 times greater than the load power)
    Phase 3 Phase 4-line
    Input Voltage Range ±15% tolerance for all standard output voltages above 380V.
    ±20% tolerance for required 380V output and all standard voltages below.
    Output Voltage 3 phase 380V (Optional: 110V/ 120V/ 208V/ 220V/ 230V/ 240V/ 400V/ 415V/ 440V/ 460V/ 480V)
    Output Accuracy ±2~4%/ ±1% (Optional)
    * In case of output accuracy of +/- 2-4%, the voltage stabilizer will be servomotor based, and in case of output accuracy of +/- 1%, the voltage stabilizer would be SCR based.
    Frequency 50Hz/60Hz
    Current Type AC
    Efficiency ≥95%
    Response Time ≤1.5S
    Ambient Temperature -15°C~+40°C
    Cooling Method Naturally air cooled
    Insulation Resistance ≥5MΩ
    Electricalintensity Without breakdown and flashover phenomena at power frequency sine voltage 2000V for 1 min
    Overload Capacity Overload current (%) Duration (min)
    20 ≤60
    40 ≤15
    60 ≤5
    Waveform Distortion Non-lack fidelity waveform
    Protection Over-voltage, over-current, feed phases
    Protection Grade IP 24
    Warranty 24 months
    Certificate ISO9001:2008, CE
    Weight 78 Kg
    Package Size 370x340x790 mm

    3 Phase Voltage Stabilizer Schematic Diagram3 phase voltage stabilizer schematic diagram


    8 KVA 3 Phase AC Automatic Voltage Stabilizer Details

    Tips: Using 3 phase 4-line voltage stabilizer or 3 phase 3-line voltage stabilizer?

    3 phase 3-line voltage stabilizer: When connected, the input and output lines are all three live lines (L1, L2, L3).

    3 phase 4-line voltage stabilizer: Input and output are all four lines, three for the live lines, one for the neutral line (L1, L2, L3, N).

    At present, the most commonly used is the 3 phase 4-line voltage stabilizer. For the 3 phase 3-line voltage stabilizer, its application is relatively rare, except in very special equipment. If every wire in the three phase circuit is connected with the same load, and the sum of the current flowing through the neutral line at every moment is zero, it is ok to remove the neutral line and use the three phase three-line system for power supply. However, this is an ideal situation. In fact, the three-phase load formed by multiple single phase loads connected to the three phase circuit cannot be completely symmetrical. In this case, the neutral line is particularly important, not optional.

    If there is no neutral line in the case of load asymmetry, an asymmetric 3 phase 3-line system power supply is formed. Due to the asymmetry of load impedance, the phase current is also asymmetric, and the voltage of the load phase is also naturally asymmetric. Some phase voltages may exceed the rated voltage of the load and the load may be damaged. Some phase voltage may be lower, the load does not work properly (light bulb dim). With the change of load impedance of each phase caused by turning on and off the light, the phase current and phase voltage will change accordingly, the light will be dimmed and brightened, and other electrical appliances will not work normally, or even be damaged. So you have to have the neutral line, the three phase four-line system.

    Existing reviews of 8 kVA 3 phase AC Automatic Voltage Stabilizer
    If the voltage stabilizer can handle my problem?
    We have connected the voltage stabilizer but the output voltage is not giving 220V, rather a very low one as you can see on the image.
    It is even giving different voltages on each phase.
    Also just want to confirm that the equipment says 50Hz, but we use 60Hz. So we want to know if the equipment can handle this.
    (from our experience it should not be problematic since your webpage states 50/60 Hz)
    From: taran | Date: 17/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, the input voltage 60Hz is compatible, in order to further solve your problem, please feedback on the following information:
    1. Please use a multimeter to measure the voltage between the three phases at the input end and at the output end, and provide us with measurement pictures or videos for reference.
    You can send us the large video file via
    2. Open the cabinet door, find the control circuit board, and then please provide us with a clear photo for confirmation.
    Overload capacity of 3-phase automatic voltage stabilizer
    What are the overloading capabilities of your 3-phase automatic voltage stabilizer?
    From: Josafat | Date: 30/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Overloading capabilities will be as follows:
    20% overloading for less than 60 minutes.
    40% overloading for less than 15 minutes.
    60% overloading for less than 5 minutes.
    Maximum tolerance of 8kVA three-phase AC automatic voltage stabilizer
    What is the highest tolerance for your 8 kVA 3 phase AC automatic voltage stabilizier (input voltage)?
    From: Matw | Date: 13/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    It is +/- 30 %.
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