Shopping cart Close

You have no items in your shopping cart.

All Categories
    Menu Close
    Search store Close
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V
    Picture of 300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V

    300 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/480V

    0 review(s) | Add your review
    SKU: PH-AVS-3P300K
    $23,809.77
    ● 300 kVA rated capacity, designed for large-scale and high-load industrial systems. ● Accommodates a broad input voltage range (304V-456V line voltage). ● Provides seamless, continuous voltage correction without steps. ● Specifically designed as a robust, virtually maintenance-free solution for the most demanding 24/7 industrial environments. ● Manufactured in compliance with international standards and equipped with a full suite of electrical and thermal protections.
    *
    *
    *
    🚚 Free shipping
    ⏱️ Delivery: 6-12 days
    🔙 30-day Returns
    Related products

    100 kVA Automatic Voltage Stabilizer, Three Phase, 230V/240V/415V

    ● 100 kVA rated power capacity industrial-grade automatic voltage stabilizer ● 3-phase, 4-wire system; input voltage range at 175V~265V (phase) / 304V~456V (line) ● Output voltage is standard 3-phase 380V (custom voltages available) ● Air-cooled design for continuous operation ● Designed for heavy-duty industrial and commercial power regulation
    $10,312.56

    150 kVA Automatic Voltage Stabilizer, Three Phase, 240V/380V/400V

    ● A 150 kVA power core designed for voltage stability in large-scale industrial facilities. ● Provides seamless, step-less voltage correction with pinpoint accuracy up to ±1%. ● Accommodates a broad permissible input voltage window (304V-456V line voltage). ● Robust design withstands significant instantaneous overloads. ● Manufactured in compliance with international standards and features electrical and thermal protections. ● Operates at over 95% efficiency, optimizing energy use and reducing the total costs.
    $13,044.62

    200 kVA Automatic Voltage Stabilizer, Three Phase, 400V/415V/440V

    ● 200 kVA rated capacity for protecting entire facilities or ultra-sensitive, high-power industrial processes. ● Handles exceptional input voltage fluctuations with a permissible window of up to ±40% from nominal. ● Features independent phase balancing and regulation, correcting voltage imbalances between phases. ● Provides precise, step-less voltage regulation with accuracy up to ±1%. ● Achieves over 95% efficiency, directly contributing to significant energy cost reduction.
    $14,341.54

    250 kVA Automatic Voltage Stabilizer, Three Phase, 220V/380V/440V

    ● 250 kVA power rating for protecting entire production lines, data halls, or large facility mains. ● Advanced computer programming enables adaptive regulation, diagnostics, and system optimization. ● Delivers seamless voltage correction with high output accuracy of ±1%. ● Handles 304V~456V AC input range, providing a stable 380V output (customizable). ● Includes over/under-voltage, delay, error, overload, overheat, and short-circuit protection.
    $18,486.15
    Overview

    The pinnacle of industrial power conditioning, this 300 kVA voltage stabilizer is engineered for mission-critical, large-scale applications where extreme capacity, rock-solid reliability, and intelligent, maintenance-free operation are non-negotiable. Designed with a fully automatic compensated regulation system, it continuously corrects voltage fluctuations caused by unstable utility grids or dynamic load changes. Featuring stepless voltage adjustment and high-efficiency operation, this stabilizer ensures clean, stable output voltage without waveform distortion. Its robust construction, advanced control technology, and comprehensive protection functions make it an ideal solution for heavy industrial machinery, production lines, and infrastructure-level power systems requiring long-term, reliable voltage regulation.

    300 kVA 3 phase voltage stabilizer feature

    Feature

    • Ultra-High Capacity for Heavy Industrial Loads: With a 300 kVA rating, this stabilizer is purpose-built for large-scale equipment, production facilities, and high-power electrical systems.
    • Stepless Automatic Voltage Regulation: Smooth, continuous voltage correction without steps or interruptions, ensuring stable output under rapidly changing load conditions.
    • Wide Three-Phase Input Voltage Range: Supports a broad 175V–265V (phase) / 304V–456V (line) input range, maintaining reliable operation even under severe grid fluctuations.
    • High Efficiency & Energy-Conscious Operation: Delivers efficiency above 95%, minimising energy loss and heat generation during continuous operation.
    • Advanced Industrial Protection System: Built-in protection against over-voltage, under-voltage, overload, overheating, and short circuit to safeguard both equipment and stabilizer.
     

    Details

    1. High-quality circuit breaker
    2. New silicon steel plate, high magnetic transformer with compensator
    3. High-speed reducer servo motor
    4. Cooling fan*2
    5. Carbon brush
    6. Precision voltage copper coils
    300 kVA 3 phase voltage stabilizer details

    3 Phase Voltage Stabilizer Schematic Diagram

    schematic diagram of 3 phase voltage stabilizer

    Specs
    Capacity 300 kVA (The power capacity of the 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 the 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 Air-cooled
    Insulation Resistance ≥5MΩ
    Electrical Intensity 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 12 months
    Certificate ISO9001:2008, CE
    Weight 1250 Kg
    Package Size 1100×800×2100 (mm)

    PDF computing30kVA-3000kVA 3-Phase Voltage Stabilizer User Manual

    Application
    3 phase automatic voltage stabilizer for medical equipment

    Medical Equipment

    3 phase automatic voltage stabilizer for communication circuits

    Communication Circuits

    3 phase automatic voltage stabilizer for CNC machine tools

    CNC Machine Tools

    3 phase automatic voltage stabilizer for power distribution equipment

    Power Distribution Equipment

    FAQ

    Q1: What are the primary applications for a 300 kVA voltage stabilizer?

    This unit is deployed in large-scale, power-critical environments, such as: Major Manufacturing & Processing Plants (automotive, steel, chemicals), Large Data Center Campuses, Hospital Complexes & Medical Research Facilities, Telecommunications Infrastructure Hubs, Water Treatment & Utility Plants, and Airport or Transportation Critical Systems. It's used where voltage instability can lead to massive financial loss, safety risks, or operational failure.

    Q2: For such a large capacity (300 kVA), what are the critical installation and site preparation requirements?

    Installation is a significant project:

    • Structural & Spatial: Requires a dedicated, reinforced equipment room with substantial floor space, clear access routes for delivery, and often a specialized concrete foundation due to extreme weight.
    • Electrical Infrastructure: The site must have an incoming utility service and distribution gear rated to handle the full input current. This often requires coordination with the local power utility.
    • Cooling & Ventilation: Despite being air-cooled, it generates considerable heat. The room must have adequate forced ventilation or air conditioning to maintain ambient temperature within specified limits, often requiring engineered HVAC design.
    • Professional Oversight: Installation must be executed and certified by a team of qualified power systems engineers and electricians.

    Q3: How is "virtually maintenance-free" defined for a unit of this scale?

    For a 300 kVA unit, "virtually maintenance-free" means it is designed for long intervals between scheduled services. Key aspects include: Sealed & Durable Components (like vacuum impregnated transformers), Advanced Solid-State Electronics with no moving parts in the control core, Self-Diagnostic Systems that predict maintenance needs, and Long-Life Design (e.g., special contact materials). Maintenance typically shifts from frequent adjustments to scheduled preventive inspections (e.g., annual thermal imaging, connection tightening, fan and filter checks) performed by qualified technicians, rather than reactive repairs.

    0 review(s)
    0.0 0
    Write your own review Close
    *
    *
    Information
    Customer service
    Payment options
    Copyright © 2026 PowerHome.com. All rights reserved.