Cast Resin Dry Type Transformer
Low partial discharge, low maintenance and stable insulation for commercial buildings, hospitals, data centers, airports and public infrastructure.
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Dry Type Transformer Manufacturer
China Dry Type Transformer Factory
IEC-compliant cast resin and customized dry type transformers for indoor power distribution, commercial buildings, data centers, hospitals, industrial plants and EPC projects.
Engineered for indoor installation with low partial discharge, low noise operation, temperature monitoring and enclosure protection. Voltage, capacity, vector group, impedance, cooling method, IP rating and project documentation built to your specification for overseas delivery.
- IEC 60076-11 Design
- Cast Resin Dry Type
- Low Partial Discharge
- Low Noise Option
- Temperature Monitoring
- IP Enclosure Available
Share your single line diagram, datasheet or project requirement for technical selection support.
China Manufacturer
Looking for a Dry Type Transformer Factory in China?
A China dry type transformer factory manufactures cast resin and customized dry type transformers for indoor power distribution projects such as commercial buildings, data centers, hospitals, industrial plants, airports and public infrastructure. These transformers are built for applications requiring fire safety, low noise operation, low partial discharge, temperature monitoring and reduced maintenance. Overseas buyers typically need support for IEC 60076-11 standards, enclosure protection, cooling configuration, project drawings, routine test reports and technical documentation before project approval and installation.
Our factory produces cast resin dry type transformers and customized distribution transformers for indoor electrical systems and safety-sensitive applications. Projects commonly require low noise performance, stable insulation design, temperature rise control, enclosure protection and complete engineering documents for consultant review and project approval.
Customized To Your Project
- Rated Capacity
- Primary & Secondary Voltage
- Vector Group
- Impedance
- Cooling Method AN / AF
- IP Enclosure Rating
- Noise Requirement
- Temperature Monitoring
- Installation Environment
- IEC Project Specifications
Technical support is available for EPC contractors, electrical consultants, panel builders, industrial facilities and commercial building projects.
Send Your Specification For Selection Support
Page Navigation
What You'll Find on This Page
Jump straight to what matters for your project, from product range and technical design to factory testing, documentation, ordering process and FAQ.
- 01Factory Overview
- 02Product Range
- 03Applications
- 04Why a China Factory
- 05Manufacturing Process
- 06Insulation & Low PD
- 07Cooling & Temp Rise
- 08Low Noise Design
- 09Enclosure & Protection
- 10Testing Capabilities
- 11Custom Solutions
- 12Operational Reliability
- 13Engineering Documents
- 14Project Cases
- 15Ordering Process
- 16FAQ
- 17Inquiry Form
Product Range
Dry Type Transformers Manufactured in Our China Factory
Request Product SpecificationsOur factory manufactures cast resin dry type transformers for indoor power distribution, commercial buildings, industrial facilities, data centers and public infrastructure projects. Production covers customized voltage ratings, capacity ranges, vector groups, impedance requirements, enclosure protection and cooling configurations based on project specifications.
Engineering support includes transformer selection, technical drawing confirmation, temperature monitoring configuration, enclosure layout, routine testing and project documentation required for overseas installation and consultant approval.
By The Numbers
Built to Project Specification, Proven in the Field
Capacity, voltage class and manufacturing depth to match the requirements of your single line diagram and project datasheet.
15+
Years Manufacturing
Dedicated dry type transformer production for indoor and project-grade applications.
20,000 kVA
Maximum Capacity
From compact distribution units up to large single-unit project transformers.
35 kV
Voltage Class
Primary voltage built to your vector group, impedance and cooling requirement.
Product Types
Dry Type Transformers We Manufacture
Six core product lines, each built to your voltage, capacity, vector group, cooling method and enclosure requirement.
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Dry Type Distribution Transformer
For indoor substations, electrical rooms and industrial power systems, with customized voltage ratio, vector group, impedance, cooling method and installation layout.
Get a QuoteLow Noise Dry Type Transformer
Core and clamping design configured to cut vibration and operating noise for hotels, hospitals, offices and residential complexes with noise-sensitive electrical rooms.
Get a QuoteDry Type Transformer With Enclosure
IP-rated enclosure options for personnel protection, dust prevention and controlled ventilation, with custom cable entry direction, airflow layout and installation footprint.
Get a QuoteDry Type Transformer for Harmonic Loads
Thermal and cooling design reviewed for UPS systems, inverters, VFDs and rectifiers, matched to your project load profile and operating environment.
Get a QuoteCustomized Dry Type Transformer
Manufactured to your full specification: capacity, voltage, impedance, vector group, enclosure, temperature monitoring and cooling, for overseas EPC and industrial projects.
Send Your Specification
Selection Note
Final transformer parameters are confirmed against IEC 60076-11, your single line diagram and project datasheet before production. Capacity, voltage class, vector group, impedance, cooling method and enclosure rating are reviewed for the actual installation environment, so the unit delivered matches consultant approval and on-site conditions.
Applications
Dry Type Transformer Solutions for Indoor and Safety-Sensitive Applications
Configured for the operating conditions, safety requirements and documentation of your specific project type.
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Application
Commercial Buildings
Why Choose Us
Why Overseas Buyers Choose a Chinese Dry Type Transformer Factory
Transformers are built to your project's electrical requirements, confirmed against IEC standards and supported with the documentation your consultant and EPC team need for approval.
- IEC 60076-11 Design Basis
- Specification-Based Manufacturing
- Complete Project Documentation
01
Specification-Based Manufacturing
Transformers are built to your project's electrical requirements rather than fixed standard models. Voltage ratio, vector group, impedance, enclosure rating, cooling method, temperature monitoring and installation layout are confirmed before production starts.
Voltage & Vector GroupCooling & Enclosure
02
Engineering Support During Technical Review
Support through consultant approval, electrical design review and equipment confirmation. Datasheets, GA drawings, wiring diagrams, enclosure layouts and routine test reports reduce delays during submission and approval.
Datasheets & GA DrawingsRoutine Test Reports
03
Flexible Configuration for Indoor Conditions
Production is adjusted to the installation environment, electrical room space, harmonic loads and local operating conditions, covering ventilation, noise limits, enclosure protection levels and cable entry arrangements.
Ventilation & NoiseCable Entry Layout
04
Support for IEC-Based Overseas Projects
Many projects require compliance with IEC standards, project specifications and consultant requirements before procurement approval. Technical confirmation before manufacturing reduces installation mismatch, modification work and commissioning risks on site.
IEC StandardsConsultant Approval
05
Better Control of Total Project Cost
Accurate configuration, installation compatibility and complete documentation reduce added costs from redesign, parameter mismatch, installation changes and incomplete technical submissions.
Fewer RedesignsAccurate Configuration
06
Technical Communication Before Production
Parameters, installation drawings and operating requirements are reviewed before manufacturing to reduce errors in voltage selection, impedance configuration, enclosure dimensions, cooling arrangement and cable connection layout.
Pre-Production ReviewDrawing Confirmation
Manufacturing Process
Dry Type Transformer Manufacturing Process
Nine controlled stages from technical review to shipment, each confirmed against your project specification.
01
Technical Design Review
Voltage, capacity, vector group, impedance, cooling method, insulation class, enclosure rating, ambient temperature and installation conditions are locked in before production.
02
Core Cutting and Stacking
Silicon steel sheets are cut and stacked to form the core. The core design directly controls no-load loss, vibration and operating noise.
03
Low Voltage Winding
Low voltage windings are built to the current rating, thermal load and short-circuit strength the project demands.
04
High Voltage Winding
High voltage windings use a controlled insulation structure to hold dielectric strength, temperature rise performance and long-term reliability.
05
Vacuum Casting and Curing
For cast resin units, epoxy is cast under vacuum to reduce internal voids and stabilize insulation, then cured under controlled process conditions.
06
Core and Coil Assembly
Cured coils are assembled with the core, insulation parts, clamps and supports. Mechanical strength and electrical clearances are checked during assembly.
07
Enclosure and Accessories
IP enclosure, ventilation louvers, cooling fans, temperature sensors, controller, alarm contacts and cable entry are fitted to the confirmed project design.
08
Factory Routine Testing
Every unit is tested before delivery: ratio, vector group, winding resistance, insulation, no-load and load loss, impedance and withstand voltage. PD, temperature rise, impulse and noise tests arranged on request.
09
Packing and Shipment
Coils, enclosure, accessories and documents are protected for transit. Drawings, test reports and operation documents ship with the unit.
Before Production
Every Parameter Confirmed Before the First Cut
Each stage runs against your confirmed single line diagram and datasheet. Send your project requirement and our engineering team reviews voltage, capacity, vector group, impedance, cooling and enclosure before manufacturing starts, so the unit delivered matches site conditions and consultant approval.
Insulation & Low PD
Low Partial Discharge and Reliable Insulation Design
Partial discharge control is a key factor in insulation reliability and long-term stability for cast resin dry type transformers. High PD activity accelerates insulation aging, raises thermal stress and shortens service life under continuous operation, so it is controlled from casting through to testing.
Vacuum Casting Process
High voltage coils are cast under vacuum to reduce internal air gaps and voids inside the epoxy resin insulation structure. Controlled casting conditions improve insulation consistency and dielectric performance across the coil.
Epoxy Resin Insulation Structure
Cast resin insulation provides stable electrical insulation, mechanical strength and thermal resistance for indoor distribution systems running under continuous load conditions.
Insulation Coordination and Winding Design
Insulation structure, conductor arrangement and winding spacing are configured to voltage class, impulse withstand requirements and electrical clearances, supporting stable operation under IEC design conditions.
Controlled Resin Mixing and Curing
Mixing ratio, temperature control and curing conditions directly affect insulation stability and mechanical performance. Controlled curing reduces internal stress and insulation defects during operation.
Partial Discharge Control and Testing
PD levels are verified against project specifications and applicable IEC testing requirements. PD testing confirms insulation condition before delivery and installation.
Long-Term Indoor Operating Reliability
Transformers in commercial buildings, hospitals, data centers and industrial facilities need stable insulation under thermal cycling, continuous load and indoor environmental conditions.
Test Confirmation
PD Levels Verified Before Delivery, Not After
Partial discharge levels are measured and recorded on the routine test report before delivery, with the acceptance limit set to your project specification or the applicable IEC 60076-11 requirement. Share the PD value your consultant requires and it is confirmed against the unit during factory testing.
Cooling & Temp Rise
Temperature Rise, Ventilation and Cooling Design
Configured to your load profile, ambient temperature and electrical room layout, so heat is managed for stable long-term operation.
1
Stable Temperature Rise Under Continuous Load
Indoor units often run in electrical rooms with limited heat dissipation space, where temperature rise drives insulation aging and load performance. Configuration is reviewed against your load condition, ambient temperature and installation space before production.
Get a Factory QuoteVentilation Design for Indoor Installation
Insufficient airflow is a common cause of overheating in indoor transformer rooms. Enclosure structure, airflow direction and installation clearance are configured to your room layout so heat dissipates effectively during operation.
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2
3
Cooling Configuration Based on Project Conditions
Units are configured with natural air cooling (AN) or forced air cooling (AF) to match load profile, operating temperature and installation conditions. Temperature monitoring, fan control, alarm signals and thermal protection are integrated for projects needing continuous monitoring.
Get a Factory QuoteReduced Noise for Public Buildings
Units in hospitals, offices, hotels, residential projects and public facilities often run close to occupied areas, where noise affects working environments and project acceptance. Low noise configurations are selected to your installation environment and noise limits.
Discuss Noise LimitsCore Structure Designed for Lower Vibration
Operating noise is tied to core vibration and structural resonance. Core clamping, assembly stability and enclosure arrangement are configured to reduce vibration transmission and operating noise under continuous load.
Review Core DesignNoise Configuration Based on Project Requirements
Required noise levels vary with electrical room location and surroundings. Noise requirements are reviewed during technical confirmation, and configuration, enclosure and cooling structure are adjusted to your operating conditions before production.
Confirm Requirements
Low Noise Design
Quiet Operation for Noise-Sensitive Sites
For hospitals, hotels, offices and residential developments, transformer noise is part of project acceptance. Core, enclosure and cooling are configured to meet the noise limit your project sets.
Send your project noise limit and we confirm the configuration before production
Send Your Specification
Enclosure & Protection
Enclosure, Protection and Installation Configuration
Protection level, cable layout and ventilation configured together for your installation environment and site conditions.
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Enclosure
Enclosure Protection Based on Environment
Testing Capabilities
Factory Testing Before Delivery
Every unit is tested before shipment, with additional verification and full documentation arranged to your project and consultant requirements.
Standard
Routine Testing Before Shipment
Electrical performance, wiring accuracy and operating condition verified on every unit per applicable testing requirements.
- Winding resistance
- Voltage ratio
- Vector group
- Impedance voltage
- No-load loss & current
- Load loss
- Applied voltage withstand
- Induced voltage withstand
- Insulation resistance
On Request
Additional Testing for Project Requirements
Extra verification for insulation, temperature rise or indoor operating conditions, arranged to your specification and consultant requirements.
- Partial discharge
- Temperature rise
- Noise level
- Lightning impulse
Documentation
Testing Documents for Project Approval
Reports and technical documents supplied for project submission, consultant review and installation confirmation before shipment.
- Routine test report
- Technical datasheet
- GA drawing
- Wiring diagram
- Temperature controller docs
- Compliance documents
Test Reports Included
Every Test Recorded Before the Unit Ships
Tell us which tests your consultant requires and we confirm them during factory testing, then supply the routine test report, datasheet and supporting documents for project submission. Verification happens before delivery, not after the unit reaches site.
Custom Solutions
Custom Dry Type Transformers Based on Your Project Specification
Twelve parameters configured to your project, from capacity and voltage to monitoring, enclosure and documentation.
Rated Capacity
Configured to your load demand, operating condition and project distribution requirements.
Primary & Secondary Voltage
Voltage ratio customized to utility supply conditions, system design and application.
Vector Group
Selected to system connection requirements and power distribution design.
Impedance Voltage
Adjusted for short-circuit current control, parallel operation and project requirements.
Cooling Method
AN natural air or AF forced air cooling, selected by loading and operating environment.
Enclosure Protection Rating
IP enclosure customized to indoor conditions, dust exposure and personnel protection.
Noise Level Configuration
Low noise configurations reviewed to installation location and project noise limits.
Temperature Monitoring
PT100 sensors, controllers, fan control, alarm signals and trip contacts integrated.
Cable Entry & Terminals
Top or bottom entry, terminal direction and layout set to space and cable routing.
Installation Environment
Reviewed for ambient temperature, altitude, humidity and indoor ventilation.
Harmonic Load Condition
Thermal and cooling design adjusted for UPS, VFD, inverter and harmonic loads.
Technical Documents
Datasheets, GA drawings, wiring diagrams, test reports and submission documents.
Operational Reliability
How We Help Reduce Indoor Operation Risks
The risks that affect indoor transformers over time, set against how each is addressed during configuration and testing before production.
| The Concern | How We Help |
|---|---|
| Overheating in Indoor Electrical Rooms Limited ventilation, high ambient temperature and continuous loading raise operating temperature and shorten insulation life over time. | Cooling method, ventilation arrangement and temperature monitoring are reviewed against your installation environment before production. |
| Excessive Operating Noise Rooms near offices, hospitals, commercial areas or public spaces often face strict noise limits during operation. | Low noise configuration, vibration reduction structure and enclosure arrangement are selected to your location and noise requirement. |
| Insulation Aging and Partial Discharge Unstable insulation and excessive partial discharge affect long-term reliability in continuous indoor operation. | Vacuum casting, insulation structure control and PD testing are applied to project specifications and operating conditions. |
| Dust, Humidity and Indoor Environment Indoor installations may face dust, humidity, airflow limits or restricted maintenance access. | Enclosure protection, ventilation structure and installation configuration are adjusted to your site conditions. |
| Monitoring and Thermal Protection Continuous-operation projects need temperature monitoring and protection for operating supervision and fault prevention. | PT100 sensors, controllers, fan control, alarm signals and trip contacts are integrated to your monitoring requirement. |
| Installation Compatibility Issues arise when dimensions, cable routing or enclosure layout do not match actual site conditions. | Drawings, installation layout confirmation and cable entry configuration are reviewed before manufacturing to cut on-site modification. |
Reviewed Before Production
Catch the Risk on the Drawing, Not on Site
Send your installation environment, load condition and noise or monitoring requirements, and the cooling, enclosure, insulation and layout are confirmed before manufacturing starts. Addressing these during configuration is far cheaper than modification work after the unit reaches site.
Engineering Documents
Engineering Documents for Project Approval and Installation
The full technical document set your consultant, EPC team and site crew need, prepared to your submission and approval requirements before manufacturing and delivery.
7+
document types per project
-
Technical Datasheet
Confirms transformer ratings, electrical parameters, cooling method, impedance, enclosure configuration and operating conditions before production approval.
-
General Arrangement Drawing
Confirms transformer dimensions, cable entry direction, terminal arrangement and installation space before equipment delivery.
-
Wiring Diagram & Temperature Control Documents
Lets site teams confirm temperature controller connections, fan control logic, alarm signals and trip contacts during installation and commissioning.
-
Routine Test Report
Verifies transformer electrical performance and factory testing results before shipment and site acceptance.
-
Enclosure & Installation Drawings
Confirms ventilation clearance, enclosure layout, foundation requirements and equipment positioning inside electrical rooms.
-
Operation & Maintenance Documents
Lets maintenance teams confirm inspection requirements, cooling system checks and recommended operating conditions after installation.
-
Project Submission Support
Documents prepared to consultant review, EPC submission and project approval requirements before manufacturing and delivery.
Project Cases
Dry Type Transformers in Real Projects
Indoor installations across commercial buildings, data centers, healthcare, infrastructure and industrial facilities.
Ordering Process
How to Buy Dry Type Transformers from Our Factory
Eight steps from your first requirement to after-sales support, with technical confirmation before production at every stage.
01Send Your Project Requirement
Share transformer specifications, single line diagrams, load information or project drawings for technical review before quotation.
02Technical Configuration Review
Configuration is reviewed for voltage, capacity, impedance, installation environment, cooling, enclosure protection and operating conditions.
03Receive Technical & Commercial Proposal
You receive technical confirmation with quotation details, configuration, drawing scope and applicable testing requirements.
04Confirm Drawings Before Production
GA drawings, terminal arrangement, cable entry, enclosure layout and parameters are confirmed before manufacturing to reduce site mismatch.
05Manufacturing & Factory Testing
Production follows confirmed specifications. Routine testing is completed before shipment and test reports can be provided for approval.
06Packing & Shipment Arrangement
Units are packed for transportation and project delivery requirements, together with technical documents and installation files.
07Installation & Document Support
Installation drawings, wiring documents, temperature controller information and operation documents support site installation and commissioning.
08After-Sales Technical Support
Support is available for installation confirmation, operating questions, temperature monitoring configuration and technical clarification after delivery.
FAQ
Frequently Asked Questions
Common technical and procurement questions for dry type transformer projects. Have one not covered here? Send it with your specification.
How do I select the correct dry type transformer for my project?
Selection usually depends on voltage ratio, load demand, installation environment, cooling method, impedance requirement, enclosure protection and operating conditions. Single line diagrams, load information and installation details are commonly required for technical configuration review.
What information is needed for quotation and technical confirmation?
Most projects require confirmation of capacity, primary and secondary voltage, frequency, vector group, impedance, cooling method, enclosure requirement, installation environment and applicable standards before quotation and manufacturing.
What is the difference between cast resin and VPI dry type transformers?
Cast resin transformers encapsulate high voltage windings in epoxy resin and are common for indoor applications needing higher moisture resistance, fire safety and low maintenance. VPI transformers are generally used in different environmental and application conditions.
Do dry type transformers require ventilation?
Yes. They rely on air cooling for heat dissipation. Ventilation space, airflow direction, enclosure configuration and ambient temperature all affect operating temperature and cooling performance.
How is transformer temperature monitored during operation?
Monitoring systems can include PT100 sensors, temperature controllers, cooling fan control, alarm contacts and trip signals for thermal supervision and operating protection.
How can operating noise be reduced in indoor installations?
Noise is affected by core structure, vibration control, enclosure arrangement and installation environment. Low noise configurations can be selected according to project requirements and installation location.
What enclosure protection options are available?
Different enclosure configurations are available according to indoor operating conditions, dust exposure, ventilation requirements and personnel protection requirements.
How is partial discharge controlled in cast resin transformers?
PD performance is related to insulation structure, vacuum casting process, resin curing conditions and winding design. PD testing can be arranged according to project specifications and applicable testing requirements.
Can dry type transformers be used for UPS, inverter or VFD loads?
Yes. Configuration can be reviewed according to harmonic load conditions, operating temperature, cooling requirement and project electrical characteristics before production.
What technical documents are usually provided for projects?
Projects may require technical datasheets, GA drawings, wiring diagrams, enclosure drawings, routine test reports, installation documents and operation manuals for consultant review, installation confirmation and project approval.
What factors affect dry type transformer service life?
Operating temperature, ventilation condition, loading profile, insulation performance, installation environment and maintenance conditions all affect long-term operating reliability.
What should be confirmed before transformer production starts?
Electrical parameters, installation dimensions, enclosure configuration, cable entry direction, cooling method, monitoring functions and applicable project requirements are usually confirmed before manufacturing to reduce installation and commissioning issues later.
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Send Your Project Requirements
Drop your specs or a rough scope. Hank replies personally within 24 hours with quotation, drawings and a clear next step.
Hi, I'm Hank.
Your Transformer Project Contact
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A single line diagram or rough scope is enough to start. We've turned rough requirements into delivered transformers for EPC contractors and project engineers across 45+ countries.
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