6kV - 35kV Range IEC & ANSI Compliant Corrugated Tank DesignOil-Immersed Transformers
The 300kva oil immersed transformer is a core piece of equipment for small and medium-capacity power distribution. Utilizing high-quality transformer oil as the insulation and cooling medium, it features stable heat dissipation and robust overload capabilities. Our 300kva oil immersed transformer is ideal for outdoor small substations, SME industrial parks, rural grid upgrades, and flexible installation scenarios requiring reliable power.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Maintenance: Periodic Maintenance Design.
• Warranty: 3-Year Standard Warranty.
The 500 kva oil filled transformer is a core piece of equipment for medium-capacity power distribution. Utilizing high-quality transformer oil as the insulation and cooling medium, it features excellent heat dissipation performance and stable overload capabilities. This 500 kva oil filled transformer is suitable for outdoor substations, medium-sized industrial park power distribution, urban distribution network upgrades, large commercial complexes, and medium-sized industrial enterprises that have higher requirements for power supply stability and medium power loads. It can operate stably for a long time in complex climatic environments ranging from -30℃ to 40℃, meeting the needs of medium-scale power transmission and distribution.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024 "Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Power Transformers").
• Maintenance Features: Periodic Maintenance Design (requires periodic testing of transformer oil quality and sealing performance to extend equipment service life).
• Warranty Period: 3-Year Warranty (covers fault repair and replacement of core components, safeguarding users' long-term usage rights).
The 1500 kva oil filled transformer is a core piece of equipment for medium-to-large capacity power distribution. Utilizing high-quality transformer oil as the insulation and cooling medium, it features superior heat dissipation performance and overload capabilities. It is ideal for outdoor substations, industrial park main distribution, urban grid upgrades, and large industrial enterprises requiring high power supply stability and open installation scenarios. 1500 kva oil filled transformer operates stably in complex climates, meeting the demands of large-scale power transmission and distribution.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Maintenance: Periodic Maintenance Design (Oil quality & sealing checks required).
• Warranty: 3-Year Standard Warranty.
Our single-phase transformers are designed for standard step-down and step-up voltage conversions. Available in both dry-type and oil-immersed configurations, they are widely applicable for industrial and civil isolation and decentralized power distribution scenarios.
Core Parameters:
• Phase / Frequency: Single-phase / 50Hz
• Capacity Range: 10kVA - 500kVA
• Vector Group: I/I0
The S13-M.RL series utilizes an innovative 3D triangular wound core design. Constructed from high magnetic grain-oriented silicon steel with a jointless structure and vacuum annealed processing, it significantly enhances energy efficiency. It drastically lowers no-load loss, current, and operating noise compared to traditional laminated core models.
Core Parameters:
• Rated Voltage: 10kV±5% / 0.4kV
• Capacity Range: 30kVA - 2500kVA
• Vector Group: Dyn11 (Standard)
Designed with an external oil conservator, these transformers guarantee superior operational safety and longevity. Equipped with a silica gel breather, Buchholz relay, and thermometer, they offer comprehensive monitoring. Ideal for outdoor use, industrial grids, high-altitude regions, and areas with extreme temperature fluctuations.
Core Parameters:
• Voltage Ratings: 10kV & 35kV Classes
• Insulation Oil: Premium 25# or 45# transformer oil
• Regulation: Off-circuit (S11/S13) & On-load (SZ11) available
The 2000 kva oil filled transformer is a large-capacity power distribution core equipment. Utilizing high-quality transformer oil as the insulation and cooling medium, 2000 kva oil filled transformer features excellent heat dissipation and overload capabilities. It is suitable for outdoor substations, large industrial park main distribution, urban grid upgrades, and large industrial enterprises requiring high stability and open installation scenarios. It ensures stable operation in complex climates for large-scale power transmission.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Maintenance: Periodic Maintenance Design (Oil quality & sealing checks required).
• Warranty: 3-Year Standard Warranty.
The Single-Phase Oil-Immersed Transformer is a core equipment for small-to-medium capacity single-phase power distribution. Using high-quality oil for insulation and cooling, it offers stable performance and overload capability. Ideal for rural centralized metering, small shops, single-phase industrial equipment, and old residential grid upgrades. It operates stably in standard climates, meeting single-phase distribution needs efficiently.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Maintenance: Periodic Maintenance Design (Oil quality & sealing checks required).
• Warranty: 3-Year Standard Warranty.
As a professional oil immersed transformer manufacturer with years of deep cultivation in electrical equipment, we supply the premium 35kv oil immersed power transformer (Full Copper S22 Series). Covering 160kVA to 3150kVA, it features an all-copper winding structure, high-quality mineral oil insulation, and an efficient cooling system. With core advantages like ultra-low loss, strong short-circuit resistance, stable operation, high-temperature tolerance, and long lifespan, it is the optimal choice for 35KV medium-large substations, regional grids, industrial main power systems, urban grid upgrades, and renewable energy integration.
Core Parameters:
• Energy Efficiency: Tier 1 Efficiency (GB 20052-2024), reducing losses by 30%-50% compared to S11.
• Maintenance: Fully Sealed Tank Design (Long-life, low-maintenance design).
• Warranty: 5-Year Comprehensive Warranty (covers all core components including full copper windings and oil).
The 300kVA oil-immersed pad mounted transformer is a core equipment for small and medium-capacity single-phase power distribution. Adopting a plate-type heat dissipation structure and a fully sealed oil-immersed design, it combines the benefits of highly efficient, uniform cooling and a compact footprint with low loss and reliable insulation. It is highly suitable for single-phase power scenarios with strict cooling requirements and limited space, such as urban old residential grid upgrades, small industrial workshops, and rural centralized residential power distribution.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Plate Heat Dissipation + Fully Sealed Oil Tank (Compact, dustproof, and moisture-proof).
• Warranty: 3-Year Standard Warranty.
The 300kVA oil-immersed substation transformer is a core distribution equipment for small and medium-capacity single-phase substations. Featuring a fully sealed oil-immersed insulation and a substation-grade highly efficient cooling system, it combines low loss and reliable insulation with high stability and robust protection. It is ideal for community substations, rural town substations, and small industrial or commercial park substations. It operates reliably in standard climates (-25℃ to 40℃) to precisely meet single-phase power transmission needs.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Fully Sealed Tank + Substation-Grade Cooling System.
• Warranty: 3-Year Standard Warranty.
The 1000 kVA oil-immersed transformer provides powerful, stable, and efficient three-phase power for demanding industrial and commercial environments. Built with premium materials and advanced oil-immersed cooling technology, it delivers low losses, strong durability, and long-term operational reliability—ideal for factories, substations, and urban power systems.
The 300kVA oil-immersed power transformer is a core distribution equipment for small and medium-capacity single-phase systems. Featuring a fully sealed oil-immersed insulation and a highly efficient cooling system, it combines low loss and reliable insulation with high stability and strong adaptability. It is highly suitable for various single-phase distribution scenarios, including urban residential communities, rural centralized living areas, small industrial workshops, and commercial complexes. It operates stably in standard climates (-25℃ to 40℃) to seamlessly meet single-phase power transmission needs.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Fully Sealed Tank + Highly Efficient Cooling System.
• Warranty: 3-Year Standard Warranty.
The oil-immersed power transformer is a core distribution equipment for medium and large substations, strictly adhering to IEC and GB/T 1094 standards. Utilizing mineral or eco-friendly oil insulation coupled with multi-stage cooling systems (ONAN, ONAF, OFAF), it delivers exceptional insulation, high cooling efficiency, and large-capacity operational stability. It is the premier choice for industrial hubs, urban grid centers, renewable energy step-up stations, and municipal backbone substations. Capable of long-term reliable operation in standard climates (-30℃ to 45℃), it also supports custom configurations for high altitudes (≤4500m) and severe environments.
Core Parameters:
• Energy Efficiency: Tier 2 or Tier 1 (GB 20052-2024), lowering no-load losses by 15%~20%.
• Structure: Mineral/Eco Oil Immersion + Multi-Stage Cooling + Compact Substation-Grade Tank.
• Warranty: 5-Year Comprehensive Warranty.
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, it 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℃), it 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.
The 300kVA oil-cooled distribution transformer is a core equipment for small and medium-capacity single-phase power distribution. Adopting a fully sealed oil-cooled heat dissipation and integrated insulation design, it combines high cooling efficiency, temperature stability, and robust distribution-grade reliability. It is perfectly suited for various single-phase scenarios, including urban residential communities, rural centralized living areas, small industrial workshops, and commercial complexes. It operates stably in standard climates (-25℃ to 40℃) to seamlessly meet single-phase power transmission needs.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).
• Structure: Fully Sealed Oil-Cooled + Integrated Insulation.
• Warranty: 3-Year Standard Warranty.
As a professional manufacturer deeply rooted in electrical equipment, we supply the premium 35KV Oil-Immersed Power Transformer (Full Copper S11 Series). Covering capacities from 160kVA to 3150kVA, it features an all-copper winding structure, high-quality mineral oil insulation, and a highly efficient cooling system. With core advantages such as low loss, strong short-circuit resistance, exceptional high-temperature tolerance, and a long lifespan, it is widely supplied to 35KV medium-to-large substations, regional grids, industrial main distribution systems, and renewable energy integrations.
Core Parameters:
• Energy Efficiency: Tier 2 Efficiency (GB 20052-2024), reducing losses by 10%~20% compared to traditional models.
• Structure: Full Copper Windings + High-Quality Mineral Oil + Fully Sealed Tank.
• Warranty: 5-Year Comprehensive Warranty covering all core components.
As a professional manufacturer deeply rooted in electrical equipment, we supply the premium 35KV Oil-Immersed Power Transformer (Full Copper S13 Series). Covering capacities from 160kVA to 3150kVA, it features an all-copper winding structure, high-quality mineral oil insulation, and a highly efficient cooling system. With core advantages such as ultra-low loss, strong short-circuit resistance, exceptional high-temperature tolerance, and a long lifespan, it is the optimal choice for 35KV medium-to-large substations, regional grids, industrial main distribution systems, and renewable energy integrations.
Core Parameters:
• Energy Efficiency: Tier 1 Efficiency (GB 20052-2024), reducing losses by 15%~30% compared to traditional S11 models.
• Structure: Full Copper Windings + High-Quality Mineral Oil + Fully Sealed Tank.
• Warranty: 5-Year Comprehensive Warranty covering all core components.
As a professional manufacturer deeply rooted in electrical equipment, we supply the premium 35KV Oil-Immersed Power Transformer (Full Copper S20 Series). Covering capacities from 160kVA to 3150kVA, it features an all-copper winding structure, high-quality mineral oil insulation, and a highly efficient cooling system. With core advantages such as ultra-low loss, strong short-circuit resistance, exceptional high-temperature tolerance, and a long lifespan, it is the optimal choice for 35KV medium-to-large substations, regional grids, industrial main distribution systems, and renewable energy integrations.
Core Parameters:
• Energy Efficiency: Tier 1 Efficiency (GB 20052-2024), reducing losses by 15%~30% compared to traditional models.
• Structure: Full Copper Windings + High-Quality Mineral Oil + Fully Sealed Tank.
• Warranty: 5-Year Comprehensive Warranty covering all core components.
Why Choose Our Oil Immersed Transformer?
Dedicated facilities ensuring speed, precision, and scalability.
5000+ Units
Annual Production CapacityCNAS Lab
In-house Type Testing50+ Countries
Export Experience
- 01.
Efficient heat dissipationThe oil immersed transformer uses insulating oil for heat transfer, maintaining stable temperature and long service life. - 02.
Superior insulationThis oil filled transformer provides strong insulation to avoid leakage and ensure safe operation. - 03.
Cost savingSimple structure cuts production and upkeep costs, ideal for most power distribution applications.
Oil Immersed Transformer Technical Specifications (IEC 60076)
S13 Oil-Immersed Transformers
S20 Oil-Immersed Transformers
S22 Oil-Immersed Transformers
Rated power | Short-circuit | No-load loss | Load loss | No-load current | Weight(kg) | Overall dimensions(mm) | Railgauge (mm) | |
Oil weight | Total weight | |||||||
30 | 4.0 | 80 | 630/600 | 1.2 | 70 | 340 | 790×580×910 | 400 |
50 | 4.0 | 100 | 910/870 | 1.2 | 75 | 410 | 830×600×970 | 400 |
63 | 4.0 | 110 | 1090/1040 | 1.0 | 80 | 440 | 850×630×1000 | 400 |
80 | 4.0 | 130 | 1310/1250 | 1.0 | 85 | 470 | 900×650×1000 | 400 |
100 | 4.0 | 150 | 1580/1500 | 0.8 | 90 | 500 | 950×700×1000 | 400 |
125 | 4.0 | 170 | 1890/1800 | 0.8 | 105 | 600 | 1100×800×1000 | 550 |
160 | 4.0 | 200 | 2310/2200 | 0.7 | 115 | 700 | 1200×900×1050 | 550 |
200 | 4.0 | 240 | 2730/2600 | 0.7 | 125 | 750 | 1300×1000×1050 | 550 |
250 | 4.0 | 290 | 3200/3050 | 0.7 | 140 | 900 | 1400×1050×1100 | 550 |
315 | 4.0 | 340 | 3830/3650 | 0.6 | 175 | 1050 | 1500×1100×1150 | 660 |
400 | 4.0 | 410 | 4520/4300 | 0.6 | 210 | 1300 | 1550×1150×1150 | 660 |
500 | 4.0 | 480 | 5410/5150 | 0.6 | 260 | 1500 | 1650×1230×1200 | 660 |
630 | 4.5 | 570 | 6200 | 0.6 | 280 | 1700 | 1600×1250×1250 | 820 |
800 | 4.5 | 700 | 7500 | 0.5 | 370 | 2100 | 2100×1300×1650 | 820 |
1000 | 4.5 | 830 | 10300 | 0.5 | 420 | 2400 | 2150×1350×1700 | 820 |
1250 | 4.5 | 970 | 12000 | 0.5 | 480 | 2700 | 2200×1400×1800 | 820 |
1600 | 4.5 | 1170 | 14500 | 0.5 | 580 | 3400 | 2300×1450×1900 | 820 |
2000 | 5.0 | 1360 | 18300 | 0.4 | 800 | 4400 | 2100×2200×2100 | 820 |
2500 | 5.0 | 1600 | 21200 | 0.4 | 860 | 5000 | 2150×2300×2200 | 820 |
Rated power | Short-circuit | No-load loss | Load loss | No-load current | Weight | Overall dimensions(mm) Width/Depth/Height | Rail gauge (mm) | |
Oil weight | Total weight | |||||||
30 | 4.0 | 70 | 505/480 | 1.2 | 100 | 480 | 820×600×930 | 400 |
50 | 4.0 | 90 | 730/695 | 1.2 | 110 | 550 | 850×620×1000 | 400 |
63 | 4.0 | 100 | 870/830 | 1.0 | 115 | 590 | 870×650×1000 | 400 |
80 | 4.0 | 115 | 1050/1000 | 1.0 | 120 | 610 | 920×680×1050 | 400 |
100 | 4.0 | 135 | 1265/1200 | 0.8 | 130 | 640 | 970×750×1050 | 400 |
125 | 4.0 | 150 | 1510/1440 | 0.8 | 140 | 750 | 1120×850×1050 | 550 |
160 | 4.0 | 180 | 1850/1760 | 0.7 | 150 | 850 | 1280×970×1050 | 550 |
200 | 4.0 | 215 | 2185/2080 | 0.7 | 190 | 900 | 1300×1000×1080 | 550 |
250 | 4.0 | 260 | 2560/2440 | 0.7 | 220 | 1050 | 1400×1100×1150 | 550 |
315 | 4.0 | 305 | 3065/2920 | 0.6 | 250 | 1200 | 1500×1150×1200 | 660 |
400 | 4.0 | 370 | 3615/3440 | 0.6 | 300 | 1500 | 1580×1200×1200 | 660 |
500 | 4.0 | 430 | 4330/4120 | 0.6 | 340 | 1800 | 1680×1250×1250 | 660 |
630 | 4.5 | 510 | 4960 | 0.6 | 280 | 2200 | 1700×1300×1300 | 820 |
800 | 4.5 | 630 | 6000 | 0.5 | 370 | 2600 | 2100×1400×1700 | 820 |
1000 | 4.5 | 745 | 8240 | 0.5 | 420 | 3100 | 2150×1450×1800 | 820 |
1250 | 4.5 | 870 | 9600 | 0.5 | 480 | 3600 | 2200×1500×1900 | 820 |
1600 | 4.5 | 1050 | 11600 | 0.5 | 580 | 4300 | 2250×1800×2200 | 820 |
2000 | 5.0 | 1225 | 14640 | 0.4 | 800 | 5100 | 2300×2100×2300 | 820 |
2500 | 5.0 | 1440 | 14840 | 0.4 | 860 | 7200 | 2350×2200×2300 | 820 |
Rated power | Short-circuit | No-load loss | Load loss | No-load current | Weight(kg) | Overall dimensions(mm) | Rail gauge (mm) | |
Oil weight | Total weight | |||||||
30 | 4.0 | 65 | 455/430 | 1.2 | 130 | 620 | 870×600×970 | 400 |
50 | 4.0 | 80 | 655/625 | 1.2 | 140 | 680 | 890×620×1020 | 400 |
63 | 4.0 | 90 | 785/745 | 1.0 | 150 | 700 | 890×650×1020 | 400 |
80 | 4.0 | 105 | 945/900 | 1.0 | 160 | 750 | 950×680×1050 | 400 |
100 | 4.0 | 120 | 1140/1080 | 0.8 | 170 | 800 | 980×750×1070 | 400 |
125 | 4.0 | 135 | 1360/1295 | 0.8 | 180 | 1000 | 1150×850×1080 | 550 |
160 | 4.0 | 160 | 1665/1585 | 0.7 | 200 | 1200 | 1280×970×1100 | 550 |
200 | 4.0 | 190 | 1970/1870 | 0.7 | 240 | 1300 | 1320×1020×1150 | 550 |
250 | 4.0 | 230 | 2300/2195 | 0.7 | 260 | 1500 | 1450×1100×1200 | 550 |
315 | 4.0 | 270 | 2760/2630 | 0.6 | 280 | 1600 | 1550×1120×1300 | 660 |
400 | 4.0 | 330 | 3250/3095 | 0.6 | 300 | 1700 | 1620×1140×1300 | 660 |
500 | 4.0 | 385 | 3900/3710 | 0.6 | 340 | 2050 | 1650×1160×1350 | 660 |
630 | 4.5 | 460 | 4460 | 0.6 | 420 | 3000 | 1680×1180×1400 | 820 |
800 | 4.5 | 560 | 5400 | 0.5 | 560 | 3500 | 1700×1200×1600 | 820 |
1000 | 4.5 | 665 | 7415 | 0.5 | 620 | 4000 | 2200×1400×1800 | 820 |
1250 | 4.5 | 780 | 8640 | 0.5 | 700 | 4400 | 2300×1600×2100 | 820 |
1600 | 4.5 | 940 | 10440 | 0.5 | 750 | 5100 | 2400×1900×2300 | 820 |
2000 | 5.0 | 1085 | 13180 | 0.4 | 800 | 5400 | 2500×1950×2400 | 820 |
2500 | 5.0 | 1280 | 13360 | 0.4 | 1200 | 9300 | 2700×2000×2750 | 820 |
Oil Immersed Transformer Applications
Streamlined Export Process
FAQ
What services do you provide for oil immersed transformer products?
As a reliable oil immersed transformer manufacturer, we offer full support for oil filled transformer, oil transformer and oil type transformer, including technical guidance and after-sales service.
What function does the oil inside an oil immersed transformer serve?
The oil in this oil type transformer cools and insulates components. Both oil filled transformer and oil transformer rely on insulating oil for stable daily operation.
Where can an oil immersed transformer be applied?
This oil filled transformer fits power distribution systems. The common oil transformer and oil type transformer work well for industrial and commercial power supply projects.
How to maintain an oil immersed transformer regularly?
Check oil quality and level for the oil type transformer. Routine maintenance is necessary for oil filled transformer and oil transformer to extend service life greatly.
What advantages does an oil immersed transformer have?
The oil transformer features good heat dissipation. This oil filled transformer and oil type transformer run steadily with low noise in various working environments.
Is an oil immersed transformer suitable for outdoor installation?
Yes, the oil type transformer adapts to outdoor use. Most oil filled transformer and oil transformer models are designed to withstand different outdoor weather conditions.
An oil immersed transformer uses insulating oil, while dry type transformer do not. Oil filled transformer, oil transformer and oil type transformer all adopt the oil cooling structure.
Why do many buyers choose an oil immersed transformer?
This oil immersed transformer, boasts reliable cooling performance. We are a professional oil immersed transformer manufacturer with rich production experience.
