Manufacturing Experience
Manufacturing Facility
Up to 35kV
Project Support
Oil-Immersed Transformer Manufacturer
Custom Distribution Transformers up to 35kV for Southeast Asian Projects| Direct from Guangdong Factory
With 26 years of manufacturing experience, Yingben produces oil-immersed distribution transformers using high-quality silicon steel cores and reliable sealed tank structures. Designed for power distribution, industrial facilities and renewable energy projects, our transformers can be customized by voltage, capacity, winding material and accessories to meet project requirements across Southeast Asia.
Built on Proven Manufacturing Experience
For more than 26 years, Yingben has focused on manufacturing oil-immersed distribution transformers, primarily serving the Chinese domestic market. We are now expanding cooperation across Southeast Asia through reliable production, project customization, OEM and ODM support, and long-term partnerships.
Oil-Immersed Distribution Transformer Range
400 kVA/10kv/0.4kv Oil-Immersed Transformer
250kVA 11kv /0.4kv Oil Converter Transformer
2500kVA Oil-Immersed Power Transformer
1250KVA 11KV/0.4KV Oil-Immersed Transformer
Oil-immersed transformer specificationsand Custom Options
Yingben oil-immersed distribution transformers can be configured according to project voltage, capacity, load characteristics, installation environment and technical requirements. Final specifications are confirmed through engineering review before production.
| Parameter | Available Options |
|---|---|
| Product Type | Oil-Immersed Distribution Transformer |
| Rated Capacity | 50–2500 kVA or customized |
| Primary Voltage | 6kV, 10kV, 11kV, 20kV, 22kV, 33kV |
| Secondary Voltage | 0.4kV, 0.415kV, 0.44kV or customized |
| Maximum Voltage Class | Up to 35kV |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Cooling Method | ONAN |
| Vector Group | Dyn11, Yyn0 or customized |
| Winding Material | Copper / Aluminum |
| Tap Changer | Off-Circuit Tap Changer |
| Tapping Range | ±2 × 2.5% or customized |
| Insulating Fluid | Mineral Oil or project-specified option |
| Tank Structure | Hermetically Sealed / Conservator Type |
| Installation | Outdoor / Indoor |
| Manufacturing Standard | GB / Project-Specified Requirements |
| Customization | OEM / ODM Available |
Specifications shown above represent common configuration options. Actual parameters, testing requirements and applicable standards will be confirmed according to the project specification and destination market.
Production of oil-immersed distribution transformer
core cutting & stacking
winding manufacturing
Finished oil-immersed transformer
Certifications and Compliance
Yingben operates under an ISO 9001 quality management system and manufactures oil-immersed distribution transformers according to applicable GB standards and confirmed project specifications. Technical standards, testing requirements and certification needs are reviewed before production.
ISO 9001 Quality Management
Our quality management system supports controlled procedures across material inspection, manufacturing, assembly, testing and final product inspection.
GB Manufacturing Standards
Standard oil-immersed transformers are manufactured according to applicable Chinese GB requirements, with final parameters confirmed against the approved technical specification.
IEC-Based Project Requirements
Where IEC 60076-based requirements are specified, our engineering team can review the design parameters, testing scope and required technical documentation.
Local Certification Cooperation
For markets requiring local certification or utility approval, Yingben can evaluate OEM manufacturing and technical cooperation with qualified local partners.
Why Choose Yingben
Mature Supply Chain
Located within an established transformer manufacturing cluster, Yingben maintains long-term relationships with suppliers of silicon steel, copper, aluminum, insulating materials, transformer oil and electrical components.
Flexible Production & Delivery
Our flexible production system supports standard oil-immersed transformers, customized specifications and project-based quantities. Production schedules are confirmed according to each order’s requirements.
Competitive Manufacturing Cost
An established domestic supply chain, direct factory communication and efficient production management help control costs while maintaining reliable materials, quality inspections and routine testing.
26 Years of Manufacturing Experience
Our team supports customized voltage, capacity, winding material, impedance, tapping range and accessories for power distribution, industrial and renewable energy projects.
Key Features of Yingben Oil-Immersed Transformers
Yingben oil-immersed distribution transformers combine proven manufacturing experience with flexible project customization. Available for common Southeast Asian grid voltages and operating environments, they provide reliable solutions for utility distribution, industrial facilities and renewable energy projects.
High-Efficiency Core Design
High-quality silicon steel cores and optimized winding structures help reduce no-load loss, load loss and operating noise while improving long-term energy efficiency.
Reliable Oil Cooling and Insulation
Mineral oil provides effective electrical insulation and natural ONAN cooling, supporting stable transformer operation under continuous and variable load conditions.
Tropical Environment Protection
Sealed tank structures, protective coatings and corrosion-resistant options can be configured for hot, humid, rainy and outdoor operating environments.
Grid-Compatible Voltage Options
Common configurations include 11kV, 22kV and 33kV systems with 50Hz or 60Hz frequency. Voltage ratios and tapping ranges can be adjusted to project requirements.
Stable Voltage Regulation
Off-circuit tap changers and project-specific tapping ranges help maintain suitable output voltage under different grid and load conditions.
Flexible Materials and Customization
Copper or aluminum windings are available according to efficiency and budget requirements. Capacity, vector group, impedance and accessories can also be customized.
Routine testing before delivery
Test Item
- Winding Resistance Measurement
- Voltage Ratio Verification
- Vector Group Verification
- No-Load Loss and No-Load Current Test
- Load Loss and Impedance Voltage Test
- Insulation Resistance Measurement
- Applied Voltage Test
- Induced Voltage Test
- Oil Leakage Inspection
Configured for Southeast Asian Project Requirements
Power distribution requirements vary across Southeast Asian markets. Yingben reviews each project according to the local voltage level, frequency, installation environment and applicable technical requirements.
Grid Compatibility
Voltage and frequency configurations including 11kV, 22kV, 33kV, 50Hz and 60Hz can be reviewed according to the destination grid and project specification.
Tropical Environment Options
Sealing, coating, corrosion protection and accessories can be configured for humid, hot and outdoor operating environments.
Project-Based Customization
Capacity, voltage ratio, winding material, vector group, impedance, tapping range, terminal arrangement and accessories can be customized.
Local Partner Cooperation
For markets requiring local certification or utility approval, we can evaluate OEM cooperation with qualified local partners.
OEM Cooperation for Local Market Requirements
Yingben welcomes cooperation with transformer distributors, electrical contractors, EPC companies and qualified local manufacturers across Southeast Asia. We provide manufacturing support based on agreed technical specifications, quality requirements and branding needs.
OEM Manufacturing
Transformers can be manufactured according to agreed drawings, technical specifications, winding materials, accessories and testing requirements.
Private Label Support
Product nameplates, brand identification, documentation and packaging can be customized according to agreed private-label requirements.
Technical Coordination
Our engineering team reviews voltage ratio, capacity, impedance, vector group, tapping range, terminal arrangement and accessories before production.
Local Compliance Cooperation
For projects requiring local certification or utility approval, we can coordinate manufacturing and technical requirements with qualified local partners.
Frequently Asked Questions
Find answers about quotations, pricing, order quantities, production lead times, technical documents and after-sales support.
What information should I provide for an accurate transformer quotation?
Please provide the rated capacity, primary and secondary voltage, frequency, vector group, winding material, quantity, installation environment and delivery destination. If available, you may also send a technical datasheet, single-line diagram, BOQ or tender specification. Our engineering team will review the information before preparing the configuration and quotation.
How is the price of an oil-immersed transformer calculated?
Pricing depends on the rated capacity, voltage level, copper or aluminum windings, required loss level, impedance, tapping range, insulating fluid, accessories, testing requirements and order quantity. Packing and shipping terms also affect the final cost. Each transformer is therefore quoted according to the confirmed project specification.
Can I order one transformer or a small trial quantity?
Yes. Yingben supports single-unit project orders, small-batch procurement and trial orders, subject to the transformer specification and material availability. For distributors and OEM partners, a trial order can be used to confirm product quality, technical documentation, communication and delivery performance before regular purchasing begins.
What is the production lead time?
Production lead time depends on the transformer capacity, voltage level, customization, material requirements, order quantity and inspection scope. The final schedule is confirmed after the technical specification and drawings have been approved. We provide a clear timeline covering drawing confirmation, production, testing, inspection and packing.
What technical documents and inspection options are available?
Depending on the project, Yingben can provide a technical datasheet, general arrangement drawing, nameplate drawing, terminal arrangement, routine test report, packing list and installation instructions. Customer inspection, video inspection, factory acceptance testing or third-party inspection can also be arranged, with the scope, schedule and costs agreed before production.
What warranty and after-sales support do you provide?
Warranty terms are confirmed in the quotation and sales contract according to the product and project conditions. Yingben provides remote engineering support for installation guidance, commissioning questions and fault analysis. Spare parts can be supplied when required, while local installation or on-site service can be coordinated with the customer’s contractor or local partner.
