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SBW-500KVA Three Phase Automatic Voltage Stabilizer | Industrial Compensation Type Power Regulator 380V

The WF·EL SBW-500KVA three-phase automatic compensation voltage stabilizer is a flagship industrial solution engineered for heavy-duty power applications. Designed based on advanced compensation voltage regulation technology, it integrates a high-precision servo motor system and full copper windings to ensure stable and reliable performance.

With a wide input voltage range of 304V–456V, the unit automatically stabilizes output at a constant 380V three-phase standard, even under severe power fluctuations. Featuring high efficiency (≥98%), zero waveform distortion, and strong resistance to electrical impact, it is ideal for continuous 24/7 industrial operation.

The system is equipped with a multi-meter visual display panel for real-time monitoring of voltage and current. Comprehensive protection functions—including over-voltage, under-voltage, phase loss, phase sequence, overload, and mechanical fault protection—ensure maximum safety and reliability.

This stabilizer is widely used in large-scale manufacturing plants, industrial parks, and critical infrastructure, providing stable and secure power for high-value equipment and production systems.

Model
SWB-500 KVA
Input
304V-456V
Output
380V
Cert.
CE
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Technical Excellence

Product Overview

The SBW-500KVA stabilizer consists of four key components: compensation transformer, contact voltage regulator, servo control system, and carbon brush transmission mechanism.

When voltage fluctuations occur, the sampling system detects deviations in real time and activates the servo motor to adjust the carbon brush position along the winding. This dynamic compensation process ensures precise voltage stabilization with a response time of ≤1.5 seconds and accuracy within ±3%.

Key Advantages

  • Ultra-High Power Capacity: 500KVA supports entire production lines or factory-level power stabilization
  • Wide Voltage Range: Performs reliably in unstable grids and extreme conditions
  • 100% Copper Construction: Low resistance, better heat dissipation, long service life (10+ years)
  • Comprehensive Protection System: Prevents damage to CNC machines, lasers, and motors
  • Visual Monitoring System: Real-time voltage and current display for easy management

Applications

  • Industrial manufacturing: CNC machines, injection molding, stamping equipment, automation lines
  • Infrastructure: hospitals, data centers, airports, railway systems
  • Unstable power environments: voltage drops, peak load conditions
  • Renewable energy systems: solar plants, energy storage systems

Selection & Installation Tips

  • Capacity Selection: Choose based on total load, with 20–30% margin recommended
  • Installation: Must be installed by certified electricians, ensure proper grounding
  • Maintenance: Regular inspection of terminals, cooling system, and insulation every 6 months

Customizable Design

In-house R&D team provides tailored solutions for unique power requirements. Customization: Support customization

Premium Materials

Copper core material with H-class insulation for superior performance.

Intelligent Protection

cnb protection with Advanced overvoltage and short-circuit mechanisms ensure safe operation.

Technical Specifications

Selling Units Single item
Construction Material Copper
Ingress Protection Over/Under Voltage, Short Circuit, Over
Input Voltage Range 304V-456V
Output Voltage Range 380V
Operating Efficiency 98%
Frequency Range 50HZ/60HZ
Manufacturing Origin Zhejiang, China

Logistics

Packaging Standards

Professional export-grade multi-layer protection. Units are secured in shock-proof custom foam molds and reinforced wooden crates for maritime safety.

Estimated Lead Time

Sample (1-5 Pcs) 7-10 Days
Bulk Orders Negotiable

Global Logistics Port

Shipped directly from our factory. We offer full support for FOB, CIF, DDP, and door-to-door express delivery.

Uncompromising Standards

Quality Assurance

Every product undergoes rigorous testing before shipment. Our ISO 9001 certified quality management system ensures consistent performance and reliability. EU CE certification validates compliance with international safety standards.

  • 100% factory testing: insulation resistance, voltage withstand, load performance
  • Temperature rise test for thermal stability verification
  • Short-circuit impedance and no-load loss measurement
  • Comprehensive documentation: test reports, operation manuals, wiring diagrams
ISO
9001 Certified
CE
EU Certified
RoHS
Compliant
IEC
Standards

Ready to Power Your
Next Project?

Get in touch with our technical team to discuss your power solution requirements. We provide customized quotations and global engineering support.

Email Support

info@wenfei-electric.com

Direct Line

+86 18070249969

Global Headquarters

Liushi Town, Wenzhou, Zhejiang, China