Oil Immersed Transformer
10–35 kV · 100–2500 kVA · IEC 60076
Three-phase oil-immersed distribution transformers for utilities and industry — standard export range with IEC-aligned losses and documentation.
Designed for practical power-asset applications
Three-phase oil-immersed distribution transformers for utility, industrial and renewable-energy applications. Ratings, voltage ratio, vector group, losses and documentation are confirmed against the project specification before order acceptance.
What we confirm before quotation
We coordinate the technical and commercial details with the appropriate manufacturing partner before confirming price, lead time and documents.
Supply format
Project-configured equipment supplied through qualified manufacturing partners; rating, documentation and delivery schedule are confirmed before order acceptance.
Typical document package
Datasheet, dimensional or wiring information, inspection records and export documents are provided where applicable to the selected configuration.
Please include in your inquiry
- kVA rating
- Voltage ratio
- Loss class
Technical Specifications
| Standard | IEC 60076-1, -2, -3, -5; losses per IEC 60076-20 |
| Type | Three-phase oil-immersed distribution |
| Rated Capacity | 100 – 2500 kVA (standard); up to 5000 kVA on inquiry |
| HV Voltage | 6, 10, 11, 20, 22, 30, 33, 35 kV (others on request) |
| LV Voltage | 0.4 kV (415 V / 380 V); other LV on request |
| Vector Group | Dyn11 (standard), Yyn0, Ynd11 available |
| Cooling | ONAN standard; ONAF with fans optional |
| Tap Changer | ±2×2.5% off-load (NLTC); OLTC on inquiry |
| Impedance Voltage | 4.0–6.5% (100–630 kVA); 6.0–7.5% (800–2500 kVA) typical |
| Temperature Rise | 65 K oil / 60 K winding (Class A) at rated AN cooling |
| No-load / Load Loss | Per IEC 60076-20 level; exact values in quotation |
| Short-circuit Strength | IEC 60076-5 |
| Winding Material | Copper or aluminium (project specified) |
| Frequency | 50 Hz / 60 Hz |
Loss and impedance values are quoted per IEC 60076-20 for the selected kVA and voltage combination. Type-test or routine test reports and FAT are arranged per purchase specification.
Available Models
| Model | Specification |
| 100–630 kVA | 10/11 kV–0.4 kV · impedance 4–6.5% · ONAN |
| 800–1600 kVA | 10/11 kV–0.4 kV · impedance 6–7% · ONAN/ONAF optional |
| 2000–2500 kVA | 10/11/35 kV–0.4 kV · impedance 6.5–7.5% · ONAN/ONAF |
| 35 kV class | Up to 2500 kVA · fully sealed tank · IEC 60076-3 insulation levels |
Exact ratings for your system voltage and duty are confirmed in the quotation against the factory datasheet. Custom configurations available on inquiry.
Features & Benefits
IEC-Aligned Design
Losses and tests referenced to IEC 60076 series.
Flexible Configuration
Copper or aluminium windings, multiple vector groups and tap ranges.
Typical Applications
Distribution substations and rural grid expansion.
Plant incoming and distribution transformers.
Solar and storage interconnection (with project specification).
Frequently Asked Questions
Are no-load and load losses guaranteed?
Values are quoted against IEC 60076-20 for your kVA rating and confirmed in the factory datasheet before order acceptance.
Do you hold stock of complete transformers?
Units are built to order through qualified manufacturing partners; share required kVA, voltage ratio and delivery date for lead-time confirmation.
