40 kVA Automatic Voltage Stabilizer, Three Phase, 208V/380V/415V

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SKU: PH-AVS-3P40K

$6,080.49

● Delivers a substantial 40 kVA capacity, providing robust voltage support for multiple critical systems or high-demand machinery. ● Features a full-automatic compensated servo motor system for real-time, precise voltage correction without waveform distortion. ● Offers user-selectable output accuracy of ±1% for ultra-sensitive equipment or ±2-4% for standard industrial applications. ● Default configuration supports a wide three-phase, four-line input range (Phase: 175V-265V / Line: 304V-456V) with a stable 380V output, adaptable to diverse grid conditions.

Output Line Voltage (L+L) *
Output Accuracy *
Input & Output Neutral Selection *
Extended Warranty

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Overview
Specs
Application
FAQ
Reviews

Overview

This 40 kVA 3-phase voltage stabilizer is designed for large-scale commercial and industrial environments where consistent voltage stability and high operating efficiency are critical. Built on a servo-compensated regulation system, it automatically corrects voltage fluctuations caused by unstable supply networks or varying load conditions. Supporting a wide three-phase four-wire input voltage range of 304V–456V AC and delivering a standard 380V output, this stabilizer achieves up to 95% efficiency while maintaining clean, distortion-free power. It's a premium-grade, high-power stabilization solution engineered for environments where power quality directly impacts operational continuity and equipment longevity, from urban commercial hubs to industrial facilities.

Feature

High-Efficiency Voltage Stabilization: Delivers up to 95% operating efficiency, reducing energy loss while ensuring stable and reliable power output.
Wide Input Voltage Compatibility: Designed to handle large voltage fluctuations in 3-phase 4-wire systems, ensuring consistent performance under unstable grid conditions.
Selectable High Output Accuracy: Offers ±1% or ±2~4% voltage accuracy options to meet different equipment sensitivity and application requirements.
Industrial Servo Compensation System: Uses a servo motor–driven compensated regulation mechanism to achieve fast response and precise voltage correction.
Comprehensive Protection Functions: Built-in overvoltage, under-voltage, overload, overheating, and short circuit protection enhance operational safety and equipment reliability.

Details

High-quality circuit breaker
New silicon steel plate, high magnetic transformer with compensator
High-speed reducer servo motor
Cooling fan*2
Carbon brush
Precision voltage copper coils

3 Phase Voltage Stabilizer Schematic Diagram

schematic diagram of 3 phase voltage stabilizer

Specs

Capacity	40 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	260 Kg
Package Size	700×520×1150 (mm)

30kVA-3000kVA 3-Phase Voltage Stabilizer User Manual

Application

Medical Equipment

Communication Circuits

CNC Machine Tools

Power Distribution Equipment

FAQ

Q1: Can this 40 kVA voltage stabilizer be used as a central power conditioning unit for an entire small to medium workshop?

Yes, absolutely. Its 40 kVA capacity makes it an ideal choice as a central voltage protection solution. It can be installed at the main distribution point to safeguard all downstream equipment in a small or medium-sized workshop, protecting everything from CNC machines and compressors to lighting and control systems from harmful grid voltage variations.

Q2: How does the high efficiency (up to 95%) benefit my operations?

High efficiency translates directly into lower operating costs and reduced heat generation. With up to 95% efficiency, only a minimal amount of energy is lost as heat during the voltage regulation process. This means lower electricity bills over time and less thermal stress on the stabilizer’s internal components, which enhances long-term reliability and reduces cooling requirements in the equipment room.

Q3: Is professional installation required, and what are the space considerations?

Due to its high power rating and three-phase wiring, professional installation by a qualified electrician is mandatory to ensure safety, compliance with local electrical codes, and optimal performance. The unit requires a well-ventilated installation space. Please refer to the detailed physical dimensions in the “Specifications” sheet to plan the installation location, ensuring adequate clearance for airflow and maintenance access.

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