Social Media
The oil immersed distribution transformer is the core power equipment for medium-to-small substations, strictly designed and manufactured according to IEC and GB/T 1094 standards. Featuring mineral or eco-friendly oil insulation and a highly efficient ONAN/ONAF cooling system, oil immersed distribution transformer perfectly combines excellent insulation with stable, centralized power distribution. It is highly suitable for industrial plant substations, commercial complexes, high-rise buildings, municipal utilities, renewable energy facilities, and township centralized power supply grids. Capable of long-term reliable operation in standard climates (-30℃ to 45℃), oil type distribution transformer also supports high-altitude (≤4500m) and severe environment customizations.
Core Parameters:
• Energy Efficiency: Tier 2/Tier 1 Efficiency (Complies with GB 20052-2024), reducing no-load loss by 15%~20%.
• Structure: Mineral/Eco Oil Immersion + Fully Sealed Tank + Substation Compact Design.
• Warranty: 5-Year Comprehensive Warranty.
Product Features
Features mineral oil insulation with superior arc-extinguishing properties. Equipped with gas relays and PRVs for real-time monitoring and rapid pressure relief, eliminating combustion risks.
Tier 2+ efficiency with optimal copper/foil windings and CRGO core reduces losses by 15-25%. The fully sealed structure yields a design lifespan of over 30 years.
Equipped with smart protection devices (overheat alarms, short-circuit & surge protection) and an anti-condensation substation enclosure for extreme environmental endurance.
Modular compact design fits indoor/outdoor substations (≤3000kg). Features 1.3x overload capacity for 30 mins, with optional caster wheels for units ≥800kVA.
Mature manufacturing yields ultra-low failure rates. Routine checks on oil quality, levels, and radiator cleanliness are sufficient, ideal for semi-unattended substations.
Supports integrated smart monitoring modules for remote tracking of temp, oil levels, and load currents, seamlessly connecting to your digital substation management systems.
Provides end-to-end support including pre-sales sizing consultation, on-site installation guidance, and a solid 5-year warranty for complete peace of mind.
Key Specifications (200kVA~2000kVA)
| Parameter | Typical Value | Description |
| Rated Capacity | 200kVA ~ 2000kVA | Maximum apparent power under long-term safe operation for centralized substation demands. |
| Rated Voltage | HV: 10kV/6kV | LV: 0.4kV | Customizable voltage inputs up to 35kV to match various regional grid standards. |
| Vector Group | Dyn11 / Yyn0 | Mainstream connection groups ensuring power quality and simple integration into 3-phase systems. |
| Impedance | 6% ~ 8% | Substation-grade specification that effectively limits short-circuit currents. |
| No-Load Loss | ≤ 0.5kW ~ ≤ 3.5kW | Tier 2+ efficiency compliant; significantly reduces OPEX by lowering idle consumption. |
| Load Loss (120℃) | ≤ 3.0kW ~ ≤ 18.0kW | Optimized copper cross-sections reduce resistance losses, achieving high energy conversion. |
| Winding Temp. Rise | ≤ 65K (Class A) | High-quality insulating oil and cooling synergistically limit heat generation. |
| Noise Level | ≤ 56~60dB(A) | Low-noise joints and shock-absorbing mounts maintain quiet operations even indoors. |
| Cooling Method | ONAN (Standard) / ONAF (Optional) | Natural cooling covers standard loads; forced air can safely boost capacity by 15-20%. |
| Protection Level | IP20 (Indoor) ~ IP54 (Outdoor) | Substation enclosures protect against dust, rain, and condensation for reliable operation. |
Detailed Description
The oil immersed distribution transformer serves as vital power conversion equipment widely used in urban grids, industrial parks and residential power supply systems. This oil immersed distribution transformer relies on insulating oil to achieve insulation and heat dissipation, ensuring stable operation under continuous load conditions.
Compared with dry-type counterparts, oil filled distribution transformers feature competitive costs and excellent cooling performance. The oil type distribution transformer adopts mature structural design, convenient for installation and routine maintenance. It can effectively adjust voltage levels to meet users’ power demand, and withstand short-term overload impacts. With reliable performance and long service lifespan, this series equipment remains a mainstream choice for outdoor and medium-voltage power distribution projects around the world.
S11 Type Core Parameters & Scenarios
| Parameter | Typical Value | Description |
| Energy Efficiency | GB 20052-2024 Tier 2 (NX2) | Meets essential compliance rules, balancing performance and capital budget. |
| No-Load Loss | Approx. 0.6kW ~ 3.8kW | Slightly higher than S13, serving standard basic distribution needs. |
| Load Loss (120℃) | Approx. 3.2kW ~ 19.0kW | Highly stable under regular centralized load conditions. |
| Partial Discharge | ≤ 10pC | Guarantees reliable fundamental insulation safety. |
| Structure | ONAN + Substation Enclosure (IP20) | Can be configured as open or shielded, with steel casings and entry/exit ports. |
| Applicable Scenarios | Budget-limited, Load ≤ 60% | Ideal for township substations, small industrial plants, commercial auxiliaries, and municipal power stations requiring ≤1000V control or local lighting power. |
Standard S13 Series Technical Reference (10kV Class)
| Capacity (kVA) | Impedance (%) | No-Load Loss (W) | Load Loss (W) | No-Load Current (%) | Oil Weight (kg) | Total Weight (kg) | Dimensions W×D×H (mm) | Gauge (mm) |
| 200 | 4.0 | 240 | 2730 / 2600 | 0.7 | 215 | 750 | 1300×1000×1050 | 550 |
| 250 | 4.0 | 290 | 3200 / 3050 | 0.7 | 240 | 900 | 1400×1050×1100 | 550 |
| 315 | 4.0 | 340 | 3830 / 3650 | 0.6 | 275 | 1050 | 1500×1100×1150 | 660 |
| 400 | 4.0 | 410 | 4520 / 4300 | 0.6 | 310 | 1300 | 1550×1150×1150 | 660 |
| 500 | 4.0 | 480 | 5410 / 5150 | 0.6 | 360 | 1500 | 1650×1230×1200 | 660 |
| 630 | 4.5 | 570 | 6200 | 0.6 | 420 | 1700 | 1600×1250×1250 | 820 |
| 800 | 4.5 | 700 | 7500 | 0.5 | 520 | 2100 | 2100×1300×1650 | 820 |
| 1000 | 4.5 | 830 | 10300 | 0.5 | 620 | 2400 | 2150×1350×1700 | 820 |
| 1250 | 4.5 | 970 | 12000 | 0.5 | 680 | 2700 | 2200×1400×1900 | 820 |
| 1600 | 4.5 | 1170 | 14500 | 0.5 | 880 | 3400 | 2300×1450×1900 | 820 |
| 2000 | 5.0 | 1360 | 18300 | 0.4 | 1050 | 4400 | 2100×2200×2100 | 820 |
* The table above showcases standard three-phase S13 series parameters, provided as a general manufacturing reference for the 10kV technology platform within the 200kVA~2000kVA capacity range.
FAQ
It is distribution equipment with core and windings fully submerged in insulating oil. The oil delivers cooling and insulation. Our oil immersed distribution transformer supports outdoor power grid, industrial and residential power distribution stably.
This oil filled distribution transformer, also named oil type distribution transformer, owns strong heat dissipation, great overload capacity and lower manufacturing cost. Our oil immersed distribution transformer runs steadily under heavy load for long-term outdoor distribution projects.
With routine oil testing and inspection, our oil filled distribution transformer (oil type distribution transformer) can serve 25–40 years. Good sealing structure of oil immersed distribution transformer slows insulation aging and extends whole unit service cycle.
For oil filled distribution transformer (oil type distribution transformer), check oil level monthly and test oil dielectric strength yearly. Timely filter or replace contaminated oil to keep oil immersed distribution transformer safe from overheating and insulation breakdown.
Our oil filled distribution transformer, known as oil type distribution transformer, fits outdoor substation, rural power grids and factory power supply. The robust cooling system of oil immersed distribution transformer adapts high-temperature and humid outdoor operating environments.
Whatsapp: +86-13961294414
E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
ADD: No. 1, Yulong Middle Road, Xuejia Town, Xinbei District, Changzhou City, China
Mobile: 0086-15380068868
