Overview of the 6-10KV Oil-Immersed Distribution Transformer
The 6-10KV oil-immersed distribution transformer is a liquid-filled power unit engineered for efficient energy distribution across medium-voltage networks. Featuring a low-loss cold-rolled grain-oriented silicon steel core with step-lap joints and high-quality copper or aluminum windings, this oil filled distribution transformer reduces energy consumption and operational costs while maintaining stable voltage output. Its robust tank with anti-corrosion coating and comprehensive accessories — including an oil conservator, pressure relief valve, gas relay, and thermometer — ensures safe, long-term operation in diverse environments.
Suitable for a wide range of applications, the transformer complies with CE and national electrical standards, offering overload capability and low noise levels ideal for noise-sensitive areas. With a rated primary voltage of 6KV or 10KV and customizable secondary voltages from 0.4KV to 10KV, it adapts to industrial plants, commercial buildings, residential communities, and renewable energy integration projects.
- Rated from 30kVA to 2500kVA covering small to medium distribution needs.
- ONAN oil-immersed self-cooling system ensures reliable heat dissipation.
- Insulation class F or H accommodates high-temperature operating environments.
- On-load or off-circuit tap changer (±5% or ±2×2.5%) for voltage regulation.
Benefits and Key Advantages of 6-10KV Oil-Immersed Distribution Transformers
High Efficiency
Low core and winding losses minimize energy waste, reducing operating costs over the transformer’s lifespan.
Reliable Performance
Quality materials and precision manufacturing ensure stable operation under continuous load and temporary overload conditions.
Overload Capable
Engineered to handle power surges safely without compromising insulation or safety devices.
Low Noise
Advanced core design keeps sound levels below 65dB, making it suitable for residential areas and commercial spaces.
Easy Maintenance
Integrated monitoring accessories — gas relay, oil level indicator, thermometer — simplify routine checks and fault detection.
Robust Construction
High-strength steel tank with anti-corrosion coating withstands outdoor conditions and extends service life.
Uses & Industries
Industrial Plants
Powers manufacturing lines, processing equipment, and heavy machinery with steady medium-voltage supply.
Commercial Buildings
Efficient distribution for shopping centers, office blocks, and hospitality venues requiring reliable 0.4KV power.
Residential Communities
Steps down 10KV or 6KV to home-compatible voltage, blending into neighborhood substations with low noise.
Renewable Energy Integration
Adapts to solar and wind farms, rural electrification, and microgrid projects needing durable distribution transformers.
Technical Data & Specifications
Standard 6-10KV oil-immersed distribution transformer parameters. Custom secondary voltages and special configurations available.
| Parameter | Details |
|---|---|
| Rated Voltage | Primary: 6KV or 10KV; Secondary: Customizable (common range 0.4KV–10KV) |
| Rated Capacity | 30kVA – 2500kVA |
| Impedance Voltage | 4%–6% for stable output and short-circuit control |
| Insulation Class | F or H, suitable for high-temperature environments |
| Cooling Method | Oil-immersed self-cooling (ONAN) |
| Noise Level | ≤65dB |
| Standards | CE, IEC 60076, National Electrical Standards |
| Rated Capacity (kVA) | High Voltage (kV) | Tap Range | Low Voltage (kV) | Connection Symbol | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Short Circuit Impedance (%) |
|---|---|---|---|---|---|---|---|---|
| 30 | 11 / 10.5 / 10 / 6.3 / 6 | ±5 ±2×2.5% |
0.4 0.69 |
Yyn0 Dyn11 Yzn11 |
100 | 630/600 | 2.3 | 4 |
| 50 | 130 | 910/870 | 2.0 | 4 | ||||
| 63 | 150 | 1090/1040 | 1.9 | 4 | ||||
| 80 | 180 | 1310/1250 | 1.9 | 4 | ||||
| 100 | 200 | 1580/1500 | 1.8 | 4 | ||||
| 125 | 240 | 1890/1800 | 1.7 | 4 | ||||
| 160 | Yyn0 Dyn11 |
280 | 2310/2200 | 1.6 | 4 | |||
| 200 | 340 | 2730/2600 | 1.5 | 4 | ||||
| 250 | 400 | 3200/3050 | 1.4 | 4 | ||||
| 315 | 480 | 3830/3650 | 1.4 | 4 | ||||
| 400 | 570 | 4520/4300 | 1.3 | 4 | ||||
| 500 | 680 | 5410/5150 | 1.2 | 4 | ||||
| 630 | 11 / 10.5 / 10 / 6.3 / 6 | ±5 ±2×2.5% |
0.4 | Yyn0 Dyn11 |
810 | 6200 | 1.1 | 4.5 |
| 800 | 960 | 7500 | 1.0 | 4.5 | ||||
| 1000 | 1150 | 10300 | 1.0 | 4.5 | ||||
| 1250 | 1360 | 12000 | 0.9 | 4.5 | ||||
| 1600 | 1640 | 14500 | 0.8 | 4.5 | ||||
| 2000 | 1960 | 19800 | 0.8 | 5 | ||||
| 2500 | 2310 | 23000 | 0.7 | 5 |
Request detailed dimension drawings, loss charts, and oil-immersed distribution transformer hs code information for import.
Why Buy Our 6-10KV Oil-Immersed Distribution Transformer
Proven Manufacturing
As an established producer of distribution transformers, we deliver factory-tested units conforming to IEC and CE standards.
Certified Quality
Each transformer undergoes routine tests — winding resistance, turns ratio, and dielectric — ensuring reliable field performance.
Competitive Pricing
Direct supply from our factory keeps costs low for wholesale and project procurement of oil-filled distribution transformers.
Fast Lead Times
Standard 6-10KV models ship in 4–6 weeks; urgent orders accommodated with flexible production scheduling.
Certifications & Standards
How This Oil-Immersed Distribution Transformer Fits Your Project
Guidance for EPCs, utilities, and contractors evaluating 6-10KV oil-immersed transformers for power distribution.
Project Applications
For Industrial Substations, the 630–2500kVA range supports heavy manufacturing loads with low losses. In Commercial Complexes, 100–500kVA units efficiently supply 0.4KV power to buildings. Residential Grids benefit from the low-noise design and compact footprint, integrating seamlessly into neighborhood substations.
Selecting Capacity and Voltage
Choose rated voltage (6KV or 10KV) to match your incoming line. Secondary voltage is customizable — common options are 0.4KV or 0.69KV. The 30–2500kVA range covers everything from small community feeders to large industrial supply points. For temporary overload scenarios, the oil-immersed design provides excellent thermal resilience.
Maintenance and Safety
The transformer comes with essential monitoring devices: a gas relay for internal fault detection, an oil level indicator, and a thermometer. Routine maintenance mainly involves checking oil condition and connections. With proper installation, this oil-filled unit can serve reliably for decades.
Frequently Asked Questions
What is an oil immersed transformer?
An oil immersed transformer is a type of transformer where the core and windings are submerged in insulating oil, which cools and insulates the internal components. This design is widely used for distribution applications due to its high efficiency and overload capability.
What is the 80% rule for transformers?
The 80% rule advises against loading a transformer continuously above 80% of its rated capacity to prevent overheating and extend its service life. It is a best practice based on NEC guidelines for continuous loads.
What is the difference between CTs and VTs?
Current Transformers (CTs) step down high current to a measurable level for metering and protection, while Voltage Transformers (VTs) reduce high voltage for similar purposes. Both are instrument transformers, but CTs handle current and VTs handle voltage.
What are the 4 types of transformers?
Based on construction and cooling, the four common types are: 1) Liquid-filled (oil-immersed) transformers, 2) Dry-type transformers, 3) Cast resin transformers, and 4) Gas-filled transformers. The oil-immersed type is the standard for outdoor distribution.
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