HENTG POWER 500kVA 13.8kV/0.4kV Oil-Immersed Transformer with ONAN Cooling for Outdoor Power Distribution
HENTG POWER 500kVA oil-immersed transformer delivers reliable outdoor power distribution with high-efficiency CRGO core, reinforced anti-leakage tank, and specialized design for harsh African environments. Custom voltage ratios and IEC/ANSI standards available.
500kVA Oil-Immersed Transformer
,13.8kV/0.4kV Power Transformer
,ONAN Cooling Distribution Transformer
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.
- CRGO silicon steel core with optimized magnetic circuit
- Low no-load loss and load loss options (S11 / S13 efficiency level)
- Reduced lifecycle operating cost
- Corrugated tank design with elastic cooling fins
- Enhanced mechanical strength for transport stability
- Vacuum oil filling process to prevent internal moisture
- Double sealing structure with high-quality nitrile rubber gaskets
- Controlled torque fastening system
- 24-hour pressure testing before shipment
- High creepage distance bushings
- Anti-corrosion coating treatment
- Suitable for high dust and sandstorm areas
- 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)
| 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 |
- Sand accumulation causing overheating
- Gasket aging leading to oil leakage
- High ambient temperature accelerating oil expansion
- Corrosion due to high UV exposure
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