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10–35kV Phase-Shifting Rectifier Transformers for High Voltage Applications

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10–35kV Phase-Shifting Rectifier Transformers for High Voltage Applications
  • By ZTELEC GROUP
  • 2025-08-05

Phase-shifting rectifier transformers rated for 10kV to 35kV are essential in modern high-voltage power systems. Their ability to shift phases and minimize harmonic distortion makes them ideal for AC to DC conversion in heavy-duty industrial environments. With rising energy demands and grid complexity, these transformers offer a reliable, high-performance solution that ensures efficient power delivery and electrical stability.

phase-shifting rectifier transformer

What is a Phase-Shifting Rectifier Transformer?

A phase-shifting rectifier transformer is a special type of power transformer that delivers both voltage transformation and controlled phase displacement. This enables rectifiers to work in multi-pulse configurations—such as 12-pulse, 18-pulse, or 24-pulse systems—significantly reducing harmonics and improving power quality.

It is widely used in HVDC transmission, DC motor drives, electrolysis plants, arc furnaces, traction substations, and renewable energy integration.

Why Use a 10kV–35kV Transformer in High-Voltage Applications?

Transformers in the 10kV to 35kV range are engineered to serve mid- to high-voltage grids and industrial systems. Here’s why they’re vital:

• High voltage adaptability: Suitable for national and international grid standards (IEC, ANSI, GB).
• Large power handling: Supports MW-level energy transmission with high stability.
• Optimized insulation: Designed to withstand high dielectric stress with long operational life.
• Energy efficiency: Low load and no-load losses help reduce operational costs over time.

Core Features of Phase-Shifting Rectifier Transformers

1. Multi-Winding and Phase Displacement

Advanced designs allow for 30°, 60°, or custom phase shifts between multiple secondary windings. This enables harmonic cancellation in rectifiers and improved voltage waveform quality. Common configurations include:

Yyn0 + d11, Dyn11 + Yyn0, Dd0 + d11 + d5

2. Harmonic Suppression and Power Quality

Multi-pulse systems using these transformers can eliminate low-order harmonics like the 5th, 7th, 11th, and 13th. Benefits include:

• Reduced harmonic interference on sensitive equipment
• Better power factor and lower energy bills
• IEEE 519 compliance for harmonic distortion limits
• Lower THDi and reduced heating in cables, capacitors, and motors

3. Robust Mechanical and Thermal Design

Phase-shifting transformers for 10–35kV grids are built with enhanced short-circuit strength, high-grade silicon steel, and customized winding structures. Cooling options include:

• AN (Air Natural)
• AF (Air Forced)
• ONAN/ONAF (Oil Natural / Oil Forced)

4. High Efficiency and Long Service Life

Yongxin Transformers use low-loss core material, precision vacuum resin casting or oil insulation, and thermally optimized enclosures to ensure long-term reliability. Expected service life exceeds 25 years under rated conditions.

Industrial Application Scenarios

10kV–35kV phase-shifting rectifier transformers are indispensable across various high-voltage use cases. Industries and systems benefiting from their application include:

• Steel and metallurgy: Feeding DC arc furnaces and electrolytic cells
• High-speed rail and subway systems: Supplying DC traction substations
• Petrochemical and chemical plants: Supporting heavy-duty DC processes
• Renewable energy farms: Integrating with HVDC converters and solar/wind inverters
• Mining and cement industries: Powering rectifiers for massive machinery and automation

10kV transformer

Compliance with International Standards

All phase-shifting transformers by Yongxin comply with rigorous testing and performance criteria, including:

• IEC 60076 – Power transformer construction and testing
• IEEE C57 – Transformer thermal limits and operation
• GB/T 6451 – Chinese transformer technical specification
• ANSI/IEEE 519 – Harmonic control standards

Available with certifications such as ISO 9001, CE, UL, and SGS.

Benefits of Custom-Engineered Rectifier Transformers

No two applications are exactly alike. That’s why working with an expert manufacturer is critical to getting the most out of your investment. Our tailored designs include:

• Customized vector group and phase shift angles
• Application-specific cooling systems
• Optimized core and winding material selection
• Integration-ready terminal layouts and protections

Custom design not only improves performance but also reduces operational risk, footprint, and unnecessary cost.

Why 10–35kV Phase-Shifting Rectifier Transformers Matter

For high-voltage industries that rely on precision, efficiency, and system stability, the 10–35kV phase-shifting rectifier transformer is a mission-critical solution. Its ability to reduce harmonics, improve DC output quality, and support large-scale industrial electrification makes it an investment in performance and sustainability.

Choosing the right transformer means better power quality, lower energy loss, and long-term operational savings.

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  • phase-shifting rectifier transformer, 10kV transformer, 35kV transformer, high v

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