3250 kVA 10 kV Custom Multi-Winding Dry Type Transformer
This 3250 kVA multi-winding dry type transformer was custom engineered and manufactured by YINGBEN for a research project of the Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences . With 36 secondary windings, a 1Y / 18Y / 18Δ configuration and project-specific electrical requirements, the completed transformer demonstrates our capability to develop dry type transformers beyond standard catalogue specifications.
3250 kVA Multi-Winding Dry Type Transformer Technical Data
This completed 3250 kVA dry type multi-winding transformer was developed around a project-specific PSM power supply architecture. The design combines a 10 kV primary, 36 secondary windings, multiple 900 V outputs and a special 1Y / 18Y / 18Δ winding configuration.
| Transformer Type | Dry Type Multi-Winding Transformer |
|---|---|
| Rated Capacity | 3250 kVA |
| Primary Rated Voltage | 10 kV |
| Maximum Grid Voltage Considered | 11.5 kV |
| Secondary Voltage | 900 V |
| Secondary Current | 83 A |
| Number of Secondary Windings | 36 |
| Winding Configuration | 1Y / 18Y / 18Δ |
| Winding Material | T2 Copper |
| Short-Circuit Impedance | < 4.5% |
| Primary-to-Core Withstand Voltage | 60 kVac / 1 min |
| Secondary-to-Core Withstand Voltage | 90 kVac / 1 min |
| Secondary-to-Primary Withstand Voltage | 90 kVac / 1 min |
| Adjacent Secondary Withstand Voltage | 8 kVac / 1 min |
| Application | PSM Power Module Power Supply |
Designed for 10 kV Grid Conditions
The project required the transformer to operate without over-excitation even when the grid voltage rises from the rated 10 kV to a maximum of 11.5 kV, while keeping the specified no-load current below 0.5%.
These Are Not Standard Catalogue Parameters
The 36-secondary winding architecture, voltage configuration, insulation levels, impedance requirements and terminal arrangement were defined around the customer's actual power system. YINGBEN translated these project requirements into a manufacturable dry type transformer design.
Why This 36-Secondary Transformer Required Custom Engineering
The main challenge of this 3250 kVA dry type transformer was not simply its capacity. The project required 36 secondary windings, multiple 900 V outputs, controlled electrical characteristics and project-specific insulation coordination within one transformer.
36 Secondary Windings
The transformer integrates 18 Y-connected and 18 Δ-connected secondary windings into one 3250 kVA unit. This is fundamentally different from a standard dry type distribution transformer with a conventional secondary arrangement.
Multi-Output Electrical Consistency
Multiple secondary outputs require more than achieving the total transformer capacity. The project also specified control of equivalent leakage reactance deviation between individual three-phase secondary outputs.
Project-Specific Insulation Design
Separate withstand-voltage requirements were defined for primary-to-core, secondary-to-core, secondary-to-primary and adjacent secondary windings. The insulation structure therefore had to be developed around the multi-winding architecture.
10 kV Grid & Application Conditions
The transformer was specified for a 10 kV grid while considering grid voltage rising to 11.5 kV. The design also had to support the operating requirements of multiple isolated PSM power modules.
In this completed project, the winding architecture, insulation relationships, electrical characteristics and output arrangement were developed around the customer's actual power system. This is the type of engineering capability required for non-standard dry type transformer projects.
From Customer Specification to a Manufactured Dry Type Transformer
This project demonstrates how YINGBEN translates a complex customer electrical specification into a manufacturable and testable dry type transformer. The solution was developed around the customer's actual power system, rather than by selecting a standard catalogue configuration.
Custom Built for a Chinese Academy of Sciences Research Project
The Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences required a special dry type transformer for its PSM power supply system.
The project required a 3250 kVA / 10 kV / 900 V transformer with 36 secondary windings and a 1Y / 18Y / 18Δ winding configuration. In addition to capacity and voltage, the specification included special requirements for insulation coordination, impedance, leakage reactance consistency and secondary terminal arrangement.
3250 kVA Custom Multi-Winding Transformer
How a Custom Transformer Requirement Becomes a Real Product
Complex dry type transformer projects require coordinated electrical, insulation, structural, manufacturing and testing decisions.
Customer Requirement
Capacity, voltage, winding quantity, winding configuration, insulation, impedance and application requirements are defined from the customer's technical specification.
Electrical Engineering
The electrical design is developed around capacity, voltage, winding architecture, impedance, insulation coordination and operating conditions.
Transformer Design
Core design, winding arrangement, insulation structure, mechanical construction and terminal layout are translated into a manufacturable transformer.
Manufacturing
The approved design moves into winding, insulation processing, assembly and production according to the confirmed project requirements.
Testing & Verification
Electrical and insulation performance is verified according to the agreed project requirements before final acceptance and delivery.
Our Dry Type Transformer Customization Capability
The completed 3250 kVA multi-winding project is one example of YINGBEN's project-based dry type transformer engineering. For new projects, we evaluate the transformer according to the customer's electrical system and technical specification rather than limiting the solution to a fixed catalogue configuration.
Voltage Configuration
Primary and secondary voltages can be evaluated according to the customer's actual power system, rather than being restricted to one standard voltage ratio.
Capacity Engineering
Transformer capacity can be developed around the actual load, system configuration and project requirements instead of relying only on standard catalogue ratings.
Winding Configuration
Standard and project-specific winding arrangements can be evaluated, including multiple secondary windings and special Y / Δ configurations where the application requires them.
Impedance Engineering
Short-circuit impedance and related electrical characteristics can be reviewed according to the customer's power system, load behavior and project specification.
Insulation Coordination
Insulation design can be developed around voltage relationships between windings, the core and adjacent circuits according to the project's electrical requirements.
Mechanical & Terminal Design
Terminal arrangement, enclosure, dimensions and other mechanical details can be reviewed according to installation, connection and project-specific interface requirements.
What Can YINGBEN Customize on a Dry Type Transformer?
YINGBEN can evaluate project-specific capacity, primary and secondary voltage, winding configuration, number of secondary windings, impedance, insulation requirements, terminal arrangement and mechanical configuration according to the customer's technical specification and actual electrical system.
Proven by a Real 3250 kVA Multi-Winding Project
The completed Chinese Academy of Sciences project required a 3250 kVA / 10 kV / 900 V dry type transformer with 36 secondary windings and a 1Y / 18Y / 18Δ configuration. It provides a concrete example of YINGBEN's ability to manufacture a dry type transformer around a complex customer specification.
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Send Your Technical Specification3250 kVA Multi-Winding Dry Type Transformer FAQ
Questions about multi-winding transformer design, project-specific dry type transformer customization and the engineering approach used in this completed 3250 kVA project.
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Have a Transformer Requirement That Doesn't Fit a Standard Catalogue?
Send us your technical specification, datasheet or single-line diagram. From conventional dry type transformers to complex multi-winding designs, YINGBEN can evaluate the transformer around your project's actual electrical requirements.