Newtranstech’s oil immersed rectifying transformer, also widely known as a rectifier transformer, transformer rectifier, or special transformer, is expertly engineered to provide reliable and efficient AC-to-DC power conversion for demanding industrial rectifier systems. In today’s industrial landscape, the rectifying transformer (or transformer rectifier machine) plays an essential role in delivering high-current, low-voltage DC power where standard solutions fall short.
Unlike a conventional rectifier vs transformer setup — in which a standard power transformer merely steps voltage while a separate rectifier handles AC-to-DC conversion — our integrated rectifier transformer is purpose-built with advanced phase-shifting windings, reinforced insulation, and superior harmonic suppression features. This optimized special transformer design directly manages the non-linear loads of rectification, effectively minimizing harmonics, improving power factor, reducing energy losses, and boosting overall system efficiency and reliability.
As a leading solution in the category of transformers and rectifiers, our rectifying transformer is trusted across heavy-duty applications. It is widely deployed in the electrochemical industry for aluminum smelting, magnesium production, copper refining, chlor-alkali processes, and other electrolysis operations. Notably, it excels in supporting green hydrogen generation through water electrolysis powered by renewable sources such as solar, wind, or hydropower. With global momentum toward carbon neutrality and surging demand for clean hydrogen, our transformer rectifier helps operators maximize electrolyzer performance while significantly lowering total electricity consumption and operational costs.
Whether you are searching for a robust rectifier transformer, a high-performance transformer rectifier, or a specialized rectifying transformer tailored for industrial DC power needs, Newtranstech delivers proven engineering excellence, durability, and energy efficiency in every unit. Explore how our special transformer solutions can elevate your rectifier systems today.
Product Features
• High Temperature Resistance & Overload Capability
Designed for continuous heavy-duty operation with excellent thermal performance.
• Maintenance-Free & Leak-Proof
Fully sealed oil-immersed construction with no-core-lifting design for easy, reliable long-term service.
• Low Noise & High Reliability
Advanced core and winding technology ensures quiet operation and superior durability.
• Energy Efficient
Significantly improves electrolysis efficiency and reduces comprehensive power consumption.
• Multi-Pulse Compatibility
Supports 6-pulse, 12-pulse, 24-pulse or higher configurations for lower harmonics.
• Variety of Models
Customizable for different voltage levels and capacities to meet diverse industrial needs.
• Eco-Friendly Design
Supports green hydrogen projects by enabling stable, high-purity H₂ and O₂ production from renewable sources.
All performance indicators have met or exceeded the requirements of the latest Chinese national standards GB/T 18494.1-2014 and GB/T 18494.3-2012, reaching a relatively advanced level among similar products in China. And can be produced according to international certification standards such as IEC, UL, CSA, etc. according to customer requirements.
Specifications & Parameters
Typical technical parameters – fully customizable to meet specific project needs:
| Category | Specification / Description |
| Type | Oil-immersed rectifying transformer (ONAN / ONAF cooling) |
| Capacity Range |
500 kVA – 100 MVA (or higher upon request) |
| Primary Voltage | 6 kV / 10 kV / 35 kV (customizable) |
| Secondary Voltage | Low-voltage, high-current output tailored for rectifier bridges (e.g., 0.5–1 kV or as required) |
| Pulse Configuration | 6, 12, 24, 36 or multi-pulse with phase-shifting windings |
| Impedance | 5.5% – 10% (optimized for rectifier applications) |
| Temperature Rise | 55°C / 65°C (average winding / hot-spot) |
| Insulation Class | A or higher, with high dielectric strength mineral oil |
| Short-Circuit Withstand | Designed per relevant IEC / GB standards for rectifier duty |
| Efficiency | ≥98.5% (depending on load and configuration) |
| Cooling Method | Natural oil circulation with air cooling (ONAN), optional forced air (ONAF) |
| Efficiency | ≥98.5% (depending on load and configuration) |
| Operating Conditions | Ambient temperature -25°C to +40°C, altitude ≤1000 m (higher altitudes available on request) |
| Parameters can be fully customized according to your rectifier system, electrolyzer requirements, or specific project needs. Contact us for detailed technical data sheets.. | |
Packaging, Warranty & Certifications Packaging：
Robust wooden crate or containerized export packaging with moisture-proof and shock-resistant protection for safe international shipment.
Warranty：
Standard 12-18 months warranty against manufacturing defects; extended options available..
Certifications & Testing：
Compliant with GB/T 18494.1-2014, GB/T 18494.3-2012, and can also produced aligned with IEC 60076 ,UL,CSA series if clients need. Third-party testing reports and type-test certificates provided upon request. ISO9001 quality management system certified.
