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{"title":"250kVA 10kV to 0.4kV Oil-Immersed Distribution Power Transformer for Rural","imgUrl":"https:\/\/img.chinax.com\/nimg\/17\/00\/828aaa633920e601f79163ff9eff-200x200-1\/250kva_10kv_to_0_4kv_oil_immersed_distribution_power_transformer_for_rural_electrification.jpg","attrs":{"Brand Name":"HENTGPOWER","Model Number":"S11-250-10\/0.4","Certification":"ICE60076","Place of Origin":"China"}}
{"title":"High Efficiency Oil Immersed Power Distribution Transformer 400kVA 10kV 0.4kV","imgUrl":"https:\/\/img.chinax.com\/nimg\/8f\/9d\/ae9edfb70b0ff5ca3eb2b3c7343f-200x200-1\/high_efficiency_oil_immersed_power_distribution_transformer_400kva_10kv_0_4kv_three_phase_onan_type_for_african_rural_electrificat.jpg","attrs":{"Brand Name":"HENTG POWER","Model Number":"S10-400","Certification":"CE","Place of Origin":"CHINA"}}
{"title":"Professional 500kVA 10kV 0.4KV Distribution Type Transformer for Unstable","imgUrl":"https:\/\/img.chinax.com\/nimg\/e2\/01\/d509451be5998b73f1f6df17fdb5-200x200-1\/professional_500kva_10kv_0_4kv_distribution_type_transformer_for_unstable_voltage_areas_with_high_efficiency_copper_winding_stable.jpg","attrs":{"Brand Name":"HENTGPOWER","Model Number":"S11 500 10\\0.4KVA","Certification":"EC,ISO9001","Place of Origin":"CHINA"}}
{"title":"Premium S11 800kVA 10kV 0.4kV Oil Immersed power Distribution Transformer with","imgUrl":"https:\/\/img.chinax.com\/nimg\/db\/cd\/c6d17be299e33b13932c8741b5e5-200x200-1\/premium_s11_800kva_10kv_0_4kv_oil_immersed_power_distribution_transformer_with_silicon_steel_core_and_copper_2faluminum_winding_fo.jpg","attrs":{"Brand Name":"HENTGPOWER","Model Number":"S11-800-10\/0.4","Certification":"ICE60076","Place of Origin":"China"}}
The HENTG POWER 300kVA 10kV/0.4kV Three-Phase Oil-Immersed Transformer (ONAN) is engineered for stable and efficient power distribution in commercial, industrial, and utility networks.
Built with optimized magnetic core design and high-grade copper windings, it delivers low losses, enhanced overload capability, and long service life under demanding operating environments. This model provides reliable performance for regions with sand, dust, high humidity, and unstable voltage conditions.
2. Key Selling Points
High-Efficiency Core
Low-loss silicon-steel core reduces energy consumption and improves long-term operating efficiency.
Enhanced Mechanical Strength
High-quality copper winding and reinforced insulation provide strong short-circuit resistance and thermal stability.
Reliable Oil Tank Structure
Anti-corrosion tank with sealed structure minimizes oil leakage risk and ensures long service life in harsh climates.
Designed for Dust-Intensive Regions
Special sealing, anti-contamination components, and durable gaskets improve reliability in sandy and desert environments.
Easy Installation & Maintenance
Compact design, stable ONAN cooling, and user-friendly terminal layout reduce installation and maintenance difficulty.
3. Product Technical Details
Parameter
Value
Rated Capacity
300kVA
Primary Voltage
10kV
Secondary Voltage
0.4kV
Vector Group
Dyn11
Cooling Method
ONAN (Oil Natural Air Natural)
Frequency
50Hz / 60Hz
Core Material
Cold-rolled grain-oriented silicon-steel sheet
Winding Material
High-conductivity copper
Insulation Class
A or F class, depending on project needs
Short-circuit Impendence
4%
Optional Accessories:
Off-circuit tap changer
On-load tap changer (OLTC)
Smart monitoring module
Customized bushings / terminals
4. Challenge & Solutions for Dust-Heavy Regions
1: Dust and sand entering the tank increases the risk of insulation aging and oil contamination.
Enhanced multi-layer sealing structure, high-performance gaskets, and stainless-steel bolts ensure a tight and stable enclosure to prevent dust intrusion.
2: High temperatures and harsh climate conditions accelerate oil deterioration.
High-purity mineral oil with strong oxidation resistance and an ONAN cooling system maintain stable thermal performance.
Reinforced welded tank Anti-corrosion epoxy coating Improved flange sealing rings These measures significantly reduce leakage risk and extend service life.
4: Voltage instability in rural or remote areas affects equipment lifespan.
Optimized electromagnetic design offers strong overload capability to maintain stable output under fluctuating grid conditions.
5. Application Scenarios
Public utility power distribution
Commercial buildings
Rural electrification
Industrial plants and workshops
Agricultural irrigation stations
Mining and construction sites
Water treatment facilities
Small renewable energy systems
6. FAQ
Can the transformer operate reliably in high-dust and sandy environments?
Yes. The product uses enhanced sealing, anti-corrosion coating, and stable tank design to maintain long-term performance in harsh outdoor conditions.
What is the typical delivery time for 300kVA oil-immersed transformers?
Standard models are usually available within 2–4 weeks, while customized configurations may require additional lead time.
Can the transformer be customized for different voltage levels or tap ranges?
Yes. Input/output voltage, tap changer range, vector group, bushings, and accessories can all be tailored for project requirements.
What tests are performed before shipment?
Routine tests include no-load loss, load loss, insulation test, ratio test, impedance test, and temperature rise inspection according to IEC standards.
Get a reliable 300kVA transformer engineered for harsh environments—contact us now for technical support and a competitive offer.
