Safe & Long Lifespan 250KVA Single Phase 0.4KV to 11KV Pole Mounted Transformer for Residential & Small Commercial Use Manufacturer
250KVA pole mounted transformer for residential/commercial use. Features explosion-proof design, high-temperature resistance, low energy loss, and 25+ year lifespan. Customizable to IEC/ANSI standards with copper/aluminum windings.
The 250KVA Single Phase Pole Mounted Transformer is designed for safe, stable, and high-efficiency power distribution in residential communities, rural electrification projects, utility grids, commercial facilities, and light industrial applications. Engineered for outdoor installation, this cylindrical pole-mounted transformer delivers reliable voltage conversion from 11KV to 0.4KV while ensuring excellent thermal performance, overload capacity, and long operational lifespan even in harsh environmental conditions.
Manufactured with premium silicon steel cores, high-purity copper or aluminum windings, and advanced insulation systems, the transformer is optimized for low loss, reduced maintenance, and stable voltage regulation. The compact pole-mounted cylindrical design minimizes installation space and lowers infrastructure costs for utility companies and EPC contractors.
This transformer is particularly suitable for hot climate countries, tropical regions, coastal areas, desert environments, and unstable grid conditions where high ambient temperatures, overload fluctuations, and safety risks require enhanced transformer protection technology.
The product complies with international standards including IEC, ANSI, IEEE, and customized utility specifications.
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Excellent High-Temperature Resistance
Designed for tropical and desert climate applications with enhanced cooling systems and high thermal endurance insulation materials to ensure stable operation under extreme ambient temperatures.
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Advanced Explosion-Proof & Fire-Resistant Design
Equipped with pressure relief devices, high-quality insulating oil, reinforced tank sealing technology, and short-circuit protection structures to minimize fire and explosion risks.
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Low Loss & Energy Saving Performance
Uses high-permeability cold-rolled grain-oriented silicon steel core to significantly reduce no-load loss and load loss, improving grid efficiency and reducing operational costs.
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Long Service Life with Minimal Maintenance
Anti-corrosion coating, moisture-resistant sealing, and oxidation-resistant materials provide reliable outdoor operation with a service life exceeding 25 years.
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Flexible Customization for Utility Projects
Voltage, frequency, impedance, tap changer, terminal arrangement, protection devices, and enclosure materials can all be customized according to local utility standards and EPC project requirements.
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Compact Pole Mounted Structure
The cylindrical pole-mounted configuration reduces installation space, lowers civil engineering costs, and enables easier transportation and installation in rural and urban distribution systems.
| Item | Specification |
|---|---|
| Product Type | Single Phase Pole Mounted Transformer |
| Rated Capacity | 250KVA |
| Primary Voltage | 11KV / Customizable |
| Secondary Voltage | 0.4KV / 240V / Customizable |
| Frequency | 50Hz / 60Hz |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Installation Type | Outdoor Pole Mounted |
| Insulation Class | Class A / Class F Optional |
| Transformer Oil | Mineral Oil / FR3 Natural Ester Optional |
| Winding Material | Copper / Aluminum Optional |
| Core Material | CRGO Silicon Steel |
| Vector Group | Customized |
| Impedance Voltage | Customized |
| Temperature Rise | ≤ 55°C / 65°C |
| Protection Level | IP55 / Customizable |
| Tap Changer | Off-circuit Tap Changer |
| Noise Level | Low Noise Design |
| Standard | IEC |
| Ambient Temperature | -25°C to +55°C |
| Relative Humidity | ≤95% |
| Altitude | ≤1000m (Customizable) |
| Anti-Corrosion Treatment | Hot-Dip Galvanized / Powder Coating |
| Protection Devices | Pressure Relief Valve, Oil Level Gauge, Thermometer, Fuse Protection |
| Service Life | 25+ Years |
| Application | Residential Areas, Rural Grid, Commercial Buildings, Utility Distribution |
Many utility companies and EPC contractors in Africa, Southeast Asia, the Middle East, and South America face severe transformer operational challenges including:
- Frequent transformer overheating
- Oil leakage caused by thermal expansion
- Transformer explosions due to unstable grid loads
- Shortened transformer lifespan under extreme sunlight exposure
- High humidity causing insulation degradation
- Dust and sand affecting cooling performance
- High maintenance costs in remote areas
These problems often lead to unexpected outages, safety accidents, and increased operational expenses.
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High-Efficiency Cooling Design
The transformer adopts optimized oil circulation structures and corrugated tank cooling technology to rapidly dissipate heat and maintain stable internal temperatures.
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Explosion Prevention Structure
Built-in pressure relief valves and reinforced tank welding technology effectively reduce internal pressure accumulation and lower explosion risks during overload or fault conditions.
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Fire-Resistant Insulation System
Optional FR3 eco-friendly insulating fluid provides higher fire points and better thermal stability than traditional mineral oil.
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UV & Corrosion Resistant Coating
Special outdoor anti-corrosion paint protects the transformer from intense UV radiation, salty coastal air, and humid environments.
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Moisture-Proof Sealing Technology
Advanced sealing gaskets and moisture-resistant breathing systems help prevent insulation aging caused by humidity ingress.
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Enhanced Short-Circuit Strength
The winding structure is mechanically reinforced to withstand unstable grid impacts and sudden short-circuit currents common in developing power networks.
Yes. The transformer is specially designed for high ambient temperature regions with enhanced cooling systems, high-temperature insulation materials, and optimized oil circulation technology.
The transformer includes pressure relief devices, reinforced tank structures, overload protection, and optional fire-resistant insulating oil to greatly reduce explosion and fire risks.
Absolutely. We provide customized voltage ratios, frequency, impedance, tap changers, and terminal configurations according to utility requirements and EPC project specifications.
Yes. The transformer uses anti-corrosion coatings, moisture-proof sealing systems, and oxidation-resistant materials suitable for coastal and tropical regions.
Under proper operating conditions, the transformer can achieve a service life of more than 25 years with minimal maintenance requirements.
Yes. We provide OEM manufacturing, customized labeling, technical support, bulk production, and complete EPC project cooperation services.
HENGTONG POWER is a professional transformer manufacturer specializing in customized power distribution solutions for global utility companies, EPC contractors, industrial projects, renewable energy systems, and commercial electrical infrastructure applications.
With years of manufacturing experience in the transformer industry, we focus on delivering high-performance and long-lifespan transformers designed to operate reliably in complex and demanding environments. Our product range includes:
- Pole Mounted Transformers
- Distribution Transformers
- Pad Mounted Transformers
- Dry Type Transformers
- Oil Immersed Transformers
- Substation Transformers
- Compact Transformer Substations
- Customized Power Distribution Solutions
Our factory integrates advanced production equipment, strict quality control systems, and international testing standards to ensure every transformer meets global performance and safety requirements.
We support customized manufacturing based on IEC, ANSI, IEEE, and local utility standards. Our engineering team works closely with overseas distributors, contractors, and energy project developers to provide tailored transformer solutions for different climates, voltage systems, and application scenarios.
- Strong OEM & ODM Capability
- Fast Technical Response
- Stable Export Supply Chain
- Competitive Factory Pricing
- Strict Quality Inspection
- International Standard Compliance
- Professional EPC Project Support
- Reliable After-Sales Service
We are committed to helping global partners build safer, more efficient, and more reliable power distribution systems through innovative transformer technology and professional manufacturing expertise.
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