Reduce Harmonics and Improve Efficiency: Phase-Shift Transformer Benefits Explained

10-29 2025 | By:

Industrial facilities face increasing pressure to reduce energy losses, minimize harmonic distortion, and improve power efficiency. Nonlinear loads, rectifiers, and variable frequency drives often generate harmonics, causing voltage distortion, overheating, and costly maintenance.

Dry-type phase-shift rectifier transformers, especially the ZT(P)SFG(H) series from ZTelec Yuguang, provide a reliable solution. These transformers reduce Total Harmonic Distortion (THD), improve energy efficiency, and support multi-pulse rectifier configurations without the need for complex external filtering equipment.

Phase Shift Rectifier Transformer Supplier

What Is a Dry-Type Phase-Shift Transformer?

A dry-type phase-shift transformer introduces a controlled phase angle between primary and secondary windings. This phase shift is critical for multi-pulse rectifier systems (6-pulse, 12-pulse, 24-pulse), enabling:

• Cancellation of specific harmonic orders

• Voltage stabilization

• Reduction in reactive power and losses

• Protection of sensitive equipment

ZT(P)SFG(H) dry-type transformers are designed for medium to high-power industrial applications, offering high insulation strength, thermal stability, and low maintenance.

ZT(P)SFG(H) Dry-Type Transformer Specifications

The following table summarizes the technical specifications of the ZT(P)SFG(H) dry-type series:

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

Phase shifting rectifier transformer price

Key Features:

• High dielectric strength and mechanical stability

• Multi-pulse rectifier compatibility for harmonic suppression

• Compact dry-type design for indoor installations

• Thermal class F/H for long-term reliability

• Minimal maintenance and oil-free operation

Benefits of ZT(P)SFG(H) Dry-Type Phase-Shift Transformers

1. Harmonic Reduction

Phase-shift transformers reduce THD in rectifier-fed systems by canceling specific harmonic orders, protecting sensitive equipment such as:

• DC drives

• Electrolyzers

• UPS systems

2. Improved Efficiency

Reducing harmonic currents lowers losses in the system, improving overall energy efficiency and cutting operational costs.

3. Enhanced Voltage Stability

The transformers stabilize voltage in multi-pulse rectifier applications, minimizing flicker and voltage dips, ensuring smooth operation for industrial processes.

4. Maintenance-Free Dry Design

Dry-type transformers do not require oil, reducing fire risk and eliminating the need for oil management or leakage prevention, making them ideal for indoor installations.

5. Multi-Pulse Rectifier Support

ZT(P)SFG(H) transformers support 6, 12, and 24-pulse rectifier configurations, allowing precise harmonic cancellation without external filters.

Application Scenarios

1. Electrolysis Plants

Dry-type phase-shift transformers ensure stable DC supply for aluminum, copper, and zinc electrolysis, reducing ripple and increasing process efficiency.

2. Steel and Metal Processing

DC drives in rolling mills, furnaces, and electroplating processes benefit from harmonic mitigation, protecting motors and rectifiers.

3. Renewable Energy Rectification

Photovoltaic and wind power systems feeding into DC grids rely on ZT(P)SFG(H) transformers to maintain voltage stability and reduce harmonics.

4. Industrial EV Charging Stations

High-power DC fast chargers require multi-pulse rectifiers. Dry-type phase-shift transformers provide clean DC output and minimize grid disturbances.

5. Data Centers

Phase-shift transformers reduce THD in rectifier-fed DC systems, protecting servers and UPS systems from voltage fluctuations.

Customization Advantages

ZTelec Yuguang excels in providing tailor-made solutions for industrial clients:

• Voltage Ratio Customization: From 0.4kV to 35kV primary voltage

• Phase Shift Adjustment: 15°–30° to meet harmonic cancellation needs

• Insulation Design: F or H class for high-temperature or humid environments

• Compact Footprint: Suitable for space-constrained substations

• Flexible Cooling: Dry-type ANAF for indoor installations or hybrid cooling for special conditions

These customization options ensure each transformer meets unique operational requirements while providing maximum efficiency and reliability.

Why Choose ZTelec Yuguang?

• ISO-certified production facilities

• Advanced engineering and testing capabilities

• Global export experience with after-sales support

• Flexible design for voltage, phase shift, and multi-pulse configurations

• Proven reliability in heavy industrial environments

ZTelec Yuguang combines technical expertise and custom manufacturing to deliver high-performance, maintenance-free dry-type phase-shift transformers suitable for modern industrial power systems.

Conclusion

The ZT(P)SFG(H) dry-type phase-shift transformer series from ZTelec Yuguang provides an effective solution for reducing harmonics, improving efficiency, and stabilizing voltage in industrial DC applications.

Key takeaways:

• Harmonic Reduction: Protect equipment and comply with IEEE 519 / IEC 61000

• Energy Efficiency: Reduce losses and operational costs

• Reliable Dry-Type Design: Safe, low-maintenance indoor operation

• Custom Solutions: Tailored to your voltage, phase, and load requirements

For industrial operators looking to enhance power quality and ensure long-term system reliability, ZTelec Yuguang offers industry-leading dry-type phase-shift transformers, engineered for efficiency, reliability, and global deployment.

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

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