315 KVA Oil Filled Distribution Transformer: 6kV Oil Type Power Transformer Connection Scheme
Jan 29, 2026
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315 KVA Oil Filled Distribution Transformer solutions are widely used in medium-voltage power distribution systems for factories, infrastructure projects, and utility networks. As a professional manufacturer, GNEE provides reliable 6kV oil type power transformers with optimized connection schemes to ensure safety, efficiency, and long-term operation.
GNEE is a manufacturer, not a trader. Founded in 2008, we specialize in industrial power equipment and engineered solutions, supplying oil-filled distribution transformers that meet international standards and project-specific requirements. With stable quality control and strong OEM/ODM capabilities, we help customers reduce installation risks and operating costs.
What Is a 315 KVA Oil Filled Distribution Transformer (6kV System)
A 315 KVA Oil Filled Distribution Transformer is designed to step down medium voltage (typically 6kV) to low-voltage levels such as 0.4kV for end users. The oil-filled structure provides excellent insulation and heat dissipation, making it suitable for continuous operation in demanding environments.
In a 6kV oil type power transformer, mineral oil acts as both an insulating medium and a cooling agent.
This design ensures:
- Stable dielectric strength
- Lower temperature rise
- Longer service life
Such transformers are commonly applied in industrial plants, commercial complexes, and regional power distribution stations.
Oil-filled distribution transformer exterior – factory-finished product
315 KVA Oil Filled Distribution Transformer Connection Scheme Explained
The 315 KVA Oil Filled Distribution Transformer connection scheme plays a critical role in system stability and protection coordination.
For 6kV applications, the most common connection configurations include:
- High Voltage Side (6kV): Delta (Δ) Connection
- Low Voltage Side (0.4kV): Star (Y) Connection with Neutral (Yn)
This Δ/Yn connection scheme offers multiple advantages:
- Suppresses third-harmonic currents
- Provides a stable neutral point on the low-voltage side
- Improves load balance and system reliability
The neutral grounding method (solid grounding or grounding resistor) is selected based on local grid standards and safety requirements.
Transformer wiring diagram – 6kV Δ / 0.4kV Yn connection scheme
6kV Oil Type Power Transformer Installation & Wiring Considerations
When installing a 315 KVA Oil Filled Distribution Transformer, correct wiring and grounding are essential for safe operation.
Key considerations include:
- Cable selection matching rated current and short-circuit capacity
- Clear identification of HV and LV terminals
- Proper earthing of transformer tank and neutral point
- Adequate oil level and insulation testing before energizing
Routine inspections of oil quality, temperature rise, and terminal connections help prevent unexpected downtime and extend transformer service life.
Applications of 315 KVA Oil Filled Distribution Transformer
A 315 KVA Oil Filled Distribution Transformer is an ideal capacity choice for medium-load scenarios such as:
- Manufacturing workshops and industrial parks
- Commercial buildings and logistics centers
- Water treatment plants and pumping stations
- Utility substations and rural power grids
Its balanced capacity allows for future load expansion while maintaining high energy efficiency and operational stability.
Technical Parameters of 315 KVA Oil Filled Distribution Transformer
| Item | Specification |
|---|---|
| Rated Capacity | 315 kVA |
| Transformer Type | Oil Filled Distribution Transformer |
| Rated Voltage (HV) | 6 kV |
| Rated Voltage (LV) | 0.4 kV |
| Frequency | 50 / 60 Hz |
| Connection Group | Δ / Yn |
| Cooling Method | ONAN |
| Insulation Level | According to IEC / GB Standards |
| Temperature Rise | ≤ 65K |
| Applicable Standards | IEC 60076 / GB / ANSI (optional) |
Why Choose GNEE as Your Transformer Manufacturer
As an experienced manufacturer, GNEE controls every step from design to testing. Our 315 KVA Oil Filled Distribution Transformer products are manufactured with strict quality management systems and can be customized for different voltage levels, connection schemes, and environmental conditions.
We don't just sell transformers-we deliver reliable power solutions tailored to your project.
Conclusion
The 315 KVA Oil Filled Distribution Transformer with a well-designed 6kV oil type power transformer connection scheme ensures safe, efficient, and long-term power distribution for industrial and utility applications. If you are looking for a trusted manufacturer with engineering expertise, contact GNEE today for technical consultation and a competitive quotation.
👉 Get in touch now to receive your customized transformer solution.
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