Engineered for superior performance in modern power networks, our three phase oil immersed distribution transformer delivers exceptional voltage transformation, energy efficiency, and long-term reliability.
This robust 3 phase distribution transformer is the ideal transformer for power in demanding electricity distribution applications. As a leading distribution transformer manufacturing and one of the trusted distribution transformer suppliers, we produce high-quality solutions that excel as power transformer and distribution transformer systems.
Our oil-immersed distribution transformers are built to deliver stable, efficient power conversion for residential, commercial, and light industrial applications. Featuring a robust light-gray steel tank with precision cooling fins, high-grade silicon steel core, and corrosion-resistant components, they minimize energy loss while ensuring long-term reliability. Manufactured with eco-friendly, RoHS-compliant materials and certified to IEC/GB standards, these transformers support customizable power ratings, tap configurations, and mounting options to match your project needs. Designed for low-maintenance operation, they come with clear service guidelines and dedicated engineering support to simplify routine care and maximize uptime.
We combine rigorous factory testing, competitive pricing, and flexible lead times to deliver unmatched value. Our responsive global after-sales team and tailored solutions help you reduce operational costs while ensuring consistent power delivery for your projects.
Key Features & Advantages
Our distribution transformers are engineered for excellence, featuring:
• Advanced Core Technology
Utilizes premium high-permeability silicon steel with a full oblique seven-joint seam (step-lap) structure for uniform magnetic flux distribution, significantly reducing no-load excitation current and no-load losses.
• High-Quality Windings
High- and low-voltage coils are wound with oxygen-free copper wire in a multi-layer cylindrical configuration, ensuring excellent electrical performance, short-circuit resistance, and thermal stability.
• Hermetically Sealed Oil Tank with Corrugated Radiators
Fully sealed corrugated-plate design provides efficient heat dissipation, compact footprint, attractive appearance, and complete protection against moisture and contaminants — eliminating the need for oil conservators.
• Optimized Cooling System
Axial interlayer oil ducts inside the windings direct oil flow toward higher-temperature zones, achieving superior heat dissipation, lower temperature rise, and extended insulation life.
• Robust Mechanical Design
Axial compression, special lifting plates, advanced fasteners, and reinforced construction withstand transportation vibration and seismic stress while eliminating core-lifting maintenance, saving time and costs.
• Eco-Friendly & Maintenance-Free
No core-lifting structure, zero environmental pollution, low noise, compact size, light weight, and high efficiency — designed for 65°C average winding temperature rise (ONAN cooling) with outstanding overload capability.
• Proven Reliability
Complies with IEC 60076 standards, offering reliable operation in harsh environments with minimal losses and maximum uptime.
Specifications & Parameters
Our three phase oil immersed distribution transformer series is available in a wide range of standard and custom configurations to meet global grid requirements.
| Category | Specification / Description |
| Rated Capacity | 30 kVA – 2500 kVA (common: 100, 200, 315, 500, 630, 1000, 1600 kVA) |
| Primary (HV) Voltage | 6 kV, 6.3 kV, 10 kV, 11 kV, 22 kV, 33 kV (±2×2.5% or ±5% taps) |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Frequency | 50 Hz / 60 Hz |
| Connection Group | Dyn11, Yyn0, Yzn11 |
| Impedance Voltage | 4.0% – 6.0% (standard 4%–5% for ≤630 kVA) |
| Load Loss (75°C) | Optimized low-loss design per capacity |
| Temperature Rise | 65°C (average winding) / 80°C (hot spot) |
| Insulation Level | 75–170 kV BIL (HV), 30–75 kV BIL (LV) |
| Tank Type | Hermetically sealed corrugated tank |
| All parameters are customizable to specific project needs. Contact us for detailed data sheets and loss calculations. | |
Packaging, Warranty & Certifications Packaging：
Export-standard strong wooden crates with moisture-proof lining, shock-absorbing fixtures, and full seaworthy/land-transport protection. Each unit is individually packed with lifting hooks and clear identification labels for safe handling.
Warranty：
18 months from date of shipment or 12 months from commissioning (whichever comes first), covering manufacturing defects and performance guarantees.
Quality Certifications：
IEC 60076, ISO 9001:2015, ISO 14001:2015, CE Marking, and optional KEMA / SGS type-test reports. Full routine, type, and special tests performed in ISO-accredited facilities.
Technical Support：
Choose our three phase distribution transformer for unmatched quality, efficiency, and value in every transformers electricity distribution project. Contact our expert team today to discuss your exact requirements.
