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Oil-Immersed Distribution Transformers Industrial Installation

Oil-Immersed Distribution Transformers

Built for project-based procurement. We help you confirm specs fast and deliver reliably.

Standards
IEC 60076, IEEE C57 options
Core
Silicon steel or amorphous alloy
Tank
Sealed corrugated or conservator type
Support
Drawings, nameplate approval, routine and type tests
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Standard Utility Distribution Transformers Energy-Saving Low-Loss Transformers Hermetically Sealed Corrugated Tank Transformers Pole-Mounted Single Phase Transformers
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HV/LV kVA range Installation

Quick Comparison

Choose the right configuration for your project requirements

Standard Utility

Typical kVA
50 - 2500 kVA
Best for
General distribution
Cost level
Standard
Typical lead time
1 - 4 weeks
Explore this type

Sealed Corrugated

Typical kVA
50 - 1600 kVA
Best for
Low maintenance sites
Cost level
Mid-range
Typical lead time
3 - 5 weeks
Explore this type

Low Loss Amorphous

Typical kVA
100 - 2000 kVA
Best for
Long-hour operation
Cost level
Premium
Typical lead time
4 - 6 weeks
Explore this type

All configurations support customized HV, LV, vector, tapping, accessories and nameplate

Related Projects

See how our oil-immersed transformers perform in real-world applications

200 kVA 0.525/0.55–0.38 kV Oil-Immersed Distribution Transformer Project

200 kVA 0.525/0.55–0.38 kV Oil-Immersed Distribution Transformer Project

Capacity
200 kVA
HV
N/A
LV
N/A
View Project
2000 kVA 33/0.4 kV Distribution Transformer for Ethiopia Utility Project

2000 kVA 33/0.4 kV Distribution Transformer for Ethiopia Utility Project

Capacity
2000 kVA
HV
N/A
LV
N/A
View Project
6.6/0.525 kV Oil-Immersed Transformer for European Utility Project

6.6/0.525 kV Oil-Immersed Transformer for European Utility Project

Capacity
3000 kVA (3 MVA)
HV
N/A
LV
N/A
View Project
Single-Phase Platform-Type Transformer Supply Project

Single-Phase Platform-Type Transformer Supply Project

Capacity
333 kVA
HV
N/A
LV
N/A
View Project
View More Projects

Technical Overview

Key technical points for procurement and engineering review

Specification We Can Build To

  • • Rated capacity range: 50-2500 kVA typical
  • • HV / LV: configurable per local grid requirement
  • • Vector group and tapping: customizable
  • • Frequency: 50 Hz or 60 Hz
  • • Cooling: ONAN common, ONAF on request

Design and Customization Scope

  • • Bushing, cable box, and terminal options
  • • Accessories options: protection, indication, and monitoring
  • • Nameplate language and ratings per requirement
  • • Dimensions and mounting per installation condition
  • • Insulation system and oil type per standard

Material Integrity Commitment

  • • No copper-to-aluminum substitution
  • • No half copper / half aluminum windings
  • • Conductor material confirmed in drawings and nameplate before production
  • • Material traceability available on request
  • • We quote based on compliant design, not on unethical shortcuts

Quality Control and Testing

  • • Routine tests with inspection records provided
  • • Type test support available on request
  • • Leak check and sealing verification for sealed designs
  • • Pre-shipment inspection photos / videos available
  • • Export packing for long-distance shipping

Proof of Capability

What you will see and receive before shipment

Factory Production

Factory Production

In-house core & winding, tank fabrication, and coating for stable delivery

Testing and Inspection

Testing and Inspection

Routine test records available. Pre-shipment inspection photos / videos supported

Shipping and Packing

Shipping and Packing

Export packing for long-distance shipping: wooden case, moisture protection, shockproof

Frequently Asked Questions

Common inquiries from procurement and engineering teams

What is the typical lead time for oil-immersed distribution transformers?

Standard configurations: 8-12 weeks from order confirmation. Custom designs or high-capacity units: 12-16 weeks. Expedited production available for urgent projects with surcharge. Lead time includes manufacturing, testing, and preparation for shipment. Delivery time depends on destination and logistics method.

Can you customize voltage ratings and vector groups?

Yes, we support full customization of primary voltage (HV), secondary voltage (LV), and vector group configurations. Common vector groups include Dyn11, Yyn0, Dyn5, and Yzn11. Tapping range and tap positions can be specified per project requirements. Provide your electrical specifications during inquiry for accurate quotation.

What standards do your transformers comply with?

Our transformers are designed and tested per IEC 60076 series (international), IEEE C57 series (North America), or ANSI standards as requested. We also comply with regional standards including AS/NZS (Australia/New Zealand), BS (UK), and GB (China). Type test reports and certifications available upon request.

Do you offer OEM/ODM and private label services?

Yes, we provide full OEM/ODM support including custom nameplate design, branding, packaging, and documentation in your company name. We can manufacture to your specifications and technical drawings. MOQ and terms depend on customization level. NDA agreements available for proprietary designs.

What is included in the factory acceptance test (FAT)?

Standard routine tests include: winding resistance, voltage ratio and polarity, vector group verification, no-load loss and current, load loss and impedance voltage, insulation resistance, applied voltage test, and induced overvoltage test. Test reports certified by our QC department. Witness testing by client or third-party inspector can be arranged.

How do I choose between sealed corrugated tank and conservator tank?

Sealed corrugated tank: maintenance-free, suitable for remote or unmanned sites, lower initial cost, limited to smaller capacities (typically ≤1600 kVA). Conservator tank: better for high-capacity units, easier oil sampling and maintenance, traditional design with proven reliability. Choice depends on site accessibility and maintenance capability.

What documentation is provided with each transformer?

Standard package includes: factory test report with certified data, nameplate photo, outline and installation drawing, operation and maintenance manual, packing list, and quality certificate. Optional: type test report (if applicable), third-party inspection certificate, material certificates for key components, and CAD drawings in DWG format.

What payment terms and shipping options are available?

Payment terms: typically 30% deposit + 70% before shipment (T/T), or L/C at sight for established clients. Shipping: FOB, CIF, or DAP terms available. We arrange sea freight, air freight (for urgent small units), or multimodal transport. Export packing includes moisture-proof wrapping, wooden crate or open frame per destination requirements.

Technical Resources

Download comprehensive guides and specification templates to streamline your transformer selection and procurement process.

Get Spec Template

Instant download after submit

Request a Technical Proposal

Our sales team will review your requirements and provide detailed specifications, pricing, and lead time within 24 business hours.

Fast response for project inquiries

Technical team available for clarification and design consultation

OEM / private label supported

Custom branding, nameplate, and documentation available

What happens next?

  1. 1. Our team reviews your specifications
  2. 2. We prepare a technical proposal with pricing
  3. 3. You receive detailed quotation and drawings
  4. 4. We discuss any modifications or clarifications

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