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{"title":"HENTG Power Oil immersed Electrical Transformer 30 Kva-630 KVA Dyn11 \/ Yyn0","imgUrl":"https:\/\/img.chinax.com\/nimg\/1d\/32\/896dff95efc00b4534b2303f2005-200x200-1\/hentg_power_oil_immersed_electrical_transformer_30_kva_630_kva_dyn11_2f_yyn0_vector.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S22","Price":"CN\u00a5929-4346\/sets"}}
{"title":"Mv Hv Oil Immersed Transformer 315kVA To 630kVA 3 Phase Distribution Transformer","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/57\/030a1c2bd8431a5b048092f17783-200x200-1\/mv_hv_oil_immersed_transformer_315kva_to_630kva_3_phase_distribution_transformer_60hz.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S13","Minimum Order Quantity":"1"}}
{"title":"Oil Immersed Type Power Distribution Transformer Outdoor 250KVA 315KVA Three","imgUrl":"https:\/\/img.chinax.com\/nimg\/c1\/f2\/2d59222c98799c53c2bb3fb5a9d1-200x200-1\/oil_immersed_type_power_distribution_transformer_outdoor_250kva_315kva_three_phase.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S13","Price":""}}
{"title":"60Hz Frequency Oil Filled Step Up Step Down Power Transformer 160KVA 200KVA","imgUrl":"https:\/\/img.chinax.com\/nimg\/8f\/a0\/14e98463d382e491a90eeb8f5462-200x200-1\/60hz_frequency_oil_filled_step_up_step_down_power_transformer_160kva_200kva_250kva.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S13","Certification":"CE"}}
{"title":"Step Up \/ Down Oil Immersed Power Transformer 30KVA 200KVA Three Phase IEC ANSI","imgUrl":"https:\/\/img.chinax.com\/nimg\/b9\/9c\/157d971e0ffe4e35db0b7446814e-200x200-1\/step_up_2f_down_oil_immersed_power_transformer_30kva_200kva_three_phase_iec_ansi_standards.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S22","Price":""}}
{"title":"3 Phase Oil Immersed Transformer Step Up Step Down 1250Kva With Layered Dual","imgUrl":"https:\/\/img.chinax.com\/nimg\/f8\/97\/5c926212d96bd737c0571d774971-200x200-1\/3_phase_oil_immersed_transformer_step_up_step_down_1250kva_with_layered_dual_winding_coil.jpg","attrs":{"Place of Origin":"China","Brand Name":"HENTG Power","Model Number":"S22","Price":""}}
HENTG POWER 500kVA 13.8kV/0.4kV Three-Phase Oil-Immersed Transformer ONAN
High-efficiency outdoor distribution transformer designed for industrial, commercial, and utility power distribution networks. Engineered for reliable operation in harsh environments including high-temperature, dusty, and high-pollution regions.
Key Products: 500kVA transformer, 13.8kV transformer, 0.4kV distribution transformer, oil immersed transformer manufacturer, ONAN transformer, outdoor power transformer
Key Features & Benefits
High Efficiency & Low Loss Design
CRGO silicon steel core with optimized magnetic circuit
Low no-load loss and load loss options (S11 / S13 efficiency level)
Reduced lifecycle operating cost
Heavy-Duty Tank Structure
Corrugated tank design with elastic cooling fins
Enhanced mechanical strength for transport stability
Vacuum oil filling process to prevent internal moisture
Advanced Anti-Leakage System
Double sealing structure with high-quality nitrile rubber gaskets
Controlled torque fastening system
24-hour pressure testing before shipment
Designed for Harsh Outdoor Conditions
High creepage distance bushings
Anti-corrosion coating treatment
Suitable for high dust and sandstorm areas
Flexible Customization Options
Voltage ratio customization (13.8kV/0.4kV or others)
Tap changer ±2×2.5% or ±5%
Copper or aluminum winding
Optional accessories (Buchholz relay, temperature indicator, surge arresters)
Technical Specifications
Rated Capacity
500kVA
Primary Voltage
13.8kV
Secondary Voltage
0.4kV
Frequency
50Hz / 60Hz
Cooling Method
ONAN (Oil Natural Air Natural)
Phase
Three-Phase
Vector Group
Dyn11 (customizable)
Insulation Class
Class A
Temperature Rise
60K / 65K
Standards
IEC 60076 / ANSI / BS (upon request)
Installation
Outdoor pole or ground mounted
Suitable Applications
Utility substations
Industrial plants
Mining projects
Solar power stations
EPC power distribution projects
Special Design for High Dust & Sand Environments
Common Problems in High-Dust African Regions:
Sand accumulation causing overheating
Gasket aging leading to oil leakage
High ambient temperature accelerating oil expansion
