QSG 500Va-500Kva Three-Phase Dry-Type Step-Up Or Step-Down Auto Transformer

Key Features

• Wide Power Range: Available from 500VA to 500KVA, suitable for various industrial machinery, CNC equipment, and automation systems.
• Step-Up & Step-Down Function: Easily configured to increase (step-up) or reduce (step-down) voltage according to your application needs.
• High Efficiency: Efficiency up to ≥98%, minimizing energy loss and ensuring consistent power delivery.
• Copper Winding Construction: Uses 100% copper enameled wire for superior conductivity, heat dissipation, and durability.
• Advanced Insulation System: Insulation Class F or H, with epoxy resin-impregnated windings for enhanced thermal endurance and safety.
• Stable Operation: Designed for ambient temperatures from –10°C to +40°C, with air-cooling (dry type) system and no waveform distortion.
• Reliable Voltage Accuracy: Output precision within ±1%, ensuring consistent power for sensitive electronic loads.
• Flexible Connection Options: Supports Y/Y or Δ/Y configurations for seamless integration into different electrical systems.
• Custom Voltage Options: Input/output voltages such as 220V, 380V, 415V, 440V, 660V, 1140V, and more can be customized to meet customer requirements.

Main technical parameter

Working Principle

An autotransformer differs from a traditional isolation transformer by sharing part of its winding between the input and output circuits. This design achieves direct electrical coupling, making the autotransformer more compact, efficient, and cost-effective.
It operates on the principle of electromagnetic induction, ensuring smooth and stable voltage transformation with minimal energy loss.

Applications

The SG Series Three-Phase Auto Transformer is widely used in:

• Industrial Automation Systems
• Machine Tools & CNC Equipment
• Power Distribution Cabinets
• Test Benches and Laboratory Equipment
• Railway and Transportation Systems
• Import/Export Electrical Equipment (Step-Up/Step-Down Use)

Its versatility makes it ideal for both domestic voltage adaptation (220V↔380V) and overseas industrial power systems requiring reliable conversion.

Why Choose ZHENGXI as Your Transformer Manufacturer

As a trusted voltage transformer and stabilizer manufacturer, ZHENGXI focuses on delivering energy-efficient, customizable, and safety-certified power solutions for global clients.
Our three-phase dry-type transformers are produced under strict quality control and comply with CE and ISO9001 standards, ensuring long-term stability and reliability for every customer.

FAQ

Q1: What’s the difference between a step-up and a step-down transformer?
A: A step-up transformer increases the output voltage, while a step-down transformer reduces it. The SG series can perform both functions depending on wiring configuration.

Q2: Can the SG transformer be customized for non-standard voltages?
A: Yes. We offer flexible voltage configurations such as 220V to 415V or 380V to 660V upon request.

Q3: Is a dry-type transformer safer than an oil-immersed type?
A: Yes. Dry-type transformers eliminate the risk of oil leakage and fire, making them suitable for indoor and environmentally sensitive applications.

Q4: Does ZHENGXI offer OEM/ODM service?
A: Absolutely. We support full customization including input/output voltage, capacity, connection type, and enclosure design.

Conclusion

The SG 500VA–500KVA Three-Phase Dry-Type Auto Transformer combines durability, efficiency, and customization in one robust package. Whether you need a step-up or step-down voltage solution, it provides reliable performance for a wide range of industrial and commercial environments.

Choose ZHENGXI — your dependable three-phase transformer manufacturer committed to innovation and global quality standards.