Top Specifications to Look for When Buying a Phase-Shift Rectifier Transformer

10-29 2025 | By:

Selecting the right phase-shift rectifier transformer is critical for industrial power systems. An improperly chosen transformer can lead to:

• High harmonic distortion

• Inefficient energy usage

• Equipment overheating

• Increased maintenance costs

The ZT(P)SFG(H) series from ZTelec Yuguang provides a reliable, customizable solution for multi-pulse rectifier systems, offering high efficiency, robust insulation, and precise phase control.

Understanding the top specifications is essential for ensuring that your transformer delivers optimal performance and complies with industry standards.

Key Specifications to Consider

When evaluating a phase-shift rectifier transformer, the following parameters are crucial:

1. Rated Power (kVA)

The transformer’s rated power must match the load requirements. Oversized transformers increase cost, while undersized units risk overheating and reduced lifespan.

ZT(P)SFG(H) Rated Power Range: 250–2000kVA

2. Primary and Secondary Voltage

Ensure that the primary voltage matches the supply grid and the secondary voltage aligns with your rectifier system.

3. Phase Shift (°)

Phase shift determines harmonic cancellation efficiency. Common values include 15°, 30°, and customized angles for 12-pulse or 24-pulse rectifiers.

4. Cooling Method

• Dry-Type ANAF: Suitable for indoor installations and low maintenance

• Oil-Immersed ONAN: For higher capacity and outdoor heavy-duty applications

5. Insulation Class

• Class F: Standard thermal rating for general industrial use

• Class H: High-temperature rating for demanding environments

6. Frequency

• Compatible with 50Hz or 60Hz grids, depending on regional standards

7. Multi-Pulse Compatibility

• Supports 6, 12, 24-pulse rectifiers for optimized harmonic reduction

• Reduces the need for external filtering equipment

8. Total Harmonic Distortion (THD)

• Effective phase-shift transformers achieve THD reduction up to 95%, ensuring clean DC output and equipment protection

German three phase transformer supplier and manufacturer

ZT(P)SFG(H) Series Technical Specifications Table

Note: The above are common specifications, and we accept customization up to 38kv/12000kva

Phase Shift Rectifier Transformer Supplier

Application Scenarios

Phase-shift rectifier transformers are used across industries requiring stable DC power and harmonic mitigation:

1. Electrolysis Plants

• Aluminum, copper, or zinc production requires stable, high-current DC

• ZT(P)SFG(H) transformers minimize voltage ripple and improve energy efficiency

2. Steel & Metal Processing

• DC drives for rolling mills and furnaces

• Harmonic suppression protects motors and rectifiers, enhancing lifespan

3. EV Fast-Charging Stations

• High-power DC output for rapid charging

• Multi-pulse rectifiers supported for minimal grid disturbance

4. Renewable Energy Rectification

• Photovoltaic and wind power inverters

• Reduce harmonic distortion and improve voltage stability

5. Industrial Data Centers

• Ensure UPS and DC-fed server systems operate without voltage fluctuations or THD-related issues

Customization Advantages

ZTelec Yuguang specializes in tailor-made solutions:

• Voltage & Phase Customization: Optimize harmonic cancellation for specific loads

• Cooling Options: Dry-type for indoor, oil-immersed for high-capacity outdoor use

• Insulation Class: F or H for high-temperature, humid, or harsh industrial environments

• Compact Design: Space-efficient solutions for indoor substations

• Multi-Pulse Configurations: 6, 12, 24-pulse support to match load and reduce external filters

Customization ensures that each transformer is optimized for the operational environment, delivering maximum efficiency and reliability.

Why ZTelec Yuguang?

• ISO-certified manufacturing for consistent quality

• Advanced engineering and testing capabilities

• Global export and on-site support for installation and commissioning

• Flexible design to meet voltage, phase shift, and harmonic suppression requirements

• Proven reliability in steel, electrolysis, renewable energy, and EV charging industries

ZTelec Yuguang combines technical expertise and customizable manufacturing to deliver high-performance phase-shift transformers that reduce harmonics and improve efficiency.

Conclusion

Choosing the right phase-shift rectifier transformer is critical for industrial efficiency, equipment longevity, and power quality. The ZT(P)SFG(H) dry-type series offers:

• Accurate phase shift for harmonic mitigation

• High-efficiency, low-loss operation

• Flexible cooling, insulation, and voltage options

• Support for multi-pulse rectifiers, minimizing THD

Industrial operators can rely on ZTelec Yuguang for custom-engineered solutions, ensuring reliable DC power, reduced harmonics, and improved system efficiency.

ZTelec Yuguang is a leading manufacturer of phase-shift rectifier transformers, providing customized dry-type designs up to 35kV for global industrial power systems.

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