ZPSG Dry-Type Rectifier Transformer for Hydrogen Production

The Dry-Type Rectifier Transformer for Variable Frequency Drives (VFD) is specifically designed to provide multi-phase rectified power for medium- and high-voltage frequency converters. Based on proven technology and extensive experience with various VFD systems, we have developed the ZPSG Series Nomex® Insulated Dry-Type Rectifier Transformer. The product range includes 9-pulse, 12-pulse, 18-pulse, and 27-pulse configurations, with both self-cooled and forced air-cooled options available.

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180-1334-5718

Scope of application

Variable Frequency Drives (VFD)

Designed for high-power motor systems, with a focus on harmonic mitigation and improved power factor.

Metallurgy & Mining

Suitable for heavy-duty electrical drive systems with impact loads, emphasizing efficient cooling and long-term reliability.

Process Power Supply

Ideal for multi-pulse rectification systems, ensuring high power quality and optimal system compatibility.

Product Description

1 The core adopts a multi-step lap process with a through-core positioning structure, ensuring no lateral or longitudinal displacement under all operating conditions.

2 Windings are designed in multiple structures, providing strong short-circuit withstand capability.

3 Equipped with a dedicated air-cooling duct system for high cooling efficiency and safe, reliable operation.

4 Optimized leakage flux distribution, fully meeting the operational requirements of VFD systems.

5 Multi-pulse rectification technology effectively suppresses harmonics, improving power quality and extending motor lifespan.

6 Various structural configurations are available to meet different variable frequency drive system requirements.

7 Maximum capacity up to 9000 kVA, supporting up to 72-pulse rectification systems.

Product Features

High Efficiency & Energy Saving

Advanced design ensures low noise operation and up to 40% energy savings, significantly reducing energy consumption.

Premium Core Material

Made with high-quality cold-rolled grain-oriented silicon steel and a 45° step-lap core structure for low loss and high performance.

Innovative Structure Design

Layered secondary phase-shifting lead design enhances appearance and simplifies installation. Modular and detachable partition structure facilitates installation, maintenance, and transportation.

Optimized Connection Technology

Secondary-side extended delta connection effectively reduces input current harmonics and improves power quality.

Excellent Operational Performance

Strong mechanical strength provides excellent short-circuit withstand capability, ensuring safe and reliable operation under high-current conditions.

High Safety & Flame Retardancy

Designed with excellent flame-retardant properties, ensuring safe and stable performance in various operating environments.

Main Parameters

Ambient Temperature	-10℃~40℃
Relative Humidity	≤95%
Altitude	≤ 1000 m
Pollution Level	Class III
Frequency	50 Hz / 60 Hz
Cooling Method	Natural Air Cooling (AN) / Forced Air Cooling (AF)
Service Life	20 years

Implementation Standard

GB/T 10228-2015 Technical Requirements for Dry-Type Power Transformers

GB 1094.11-2007 Technical Specifications and Testing Methods for Dry-Type Transformers

GB/T 22072-2008 Technical Conditions for Variable Frequency Drive (VFD) Transformers

JB/T 10088-2004 Technical Requirements for Dry-Type Power Transformers of 6 kV Class and Above

IEC 60076-11:2004 International Electrotechnical Commission (IEC) Standards for Dry-Type Transformers

Technical Advantages

R&D Cloud Platform

An integrated system combining electromagnetic optimization design, parametric modeling, performance analysis, structural optimization, and automatic drawing generation. It enables efficient sharing of transformer design resources and supports data management including search, modification, and version control.

Simulation Analysis

Advanced multi-physics simulation covering fluid flow, thermal field, electric field, leakage magnetic field, transient wave processes, and short-circuit forces. Each product series is optimized through thermal and flow simulations to accurately determine winding temperature rise and hotspot distribution, ensuring stable performance and high reliability.

Smart Operation & Maintenance Platform

By collecting key operational data such as temperature, current, voltage, vibration, and grid harmonics, the system enables real-time power quality analysis and fault detection. It also supports mobile access for remote monitoring and intelligent operation & maintenance.