Three-Phase Dry Type Transformers: Safe & Efficient Power Distribution
Three-Phase Dry Type Transformers: Safe & Efficient Power Distribution
As modern electrical grids and industrial facilities evolve, the demand for safe, reliable, and low-maintenance power systems continues to grow. Discover how our advanced three-phase dry-type transformers deliver high performance without the safety hazards of oil-filled units.
What is a Three-Phase Dry-Type Transformer?
Unlike traditional oil-immersed transformers, a three-phase dry-type transformer relies on air rather than liquid for cooling. The windings are insulated and encapsulated in a solid epoxy resin matrix, often under a vacuum (cast resin technology). This solid insulation completely isolates the core and windings from moisture, dirt, and corrosive industrial atmospheres, providing robust voltage regulation and long-term service life.
Key Benefits of Cast Resin Dry Type Transformers
High Fire Safety
Epoxy resin is self-extinguishing and does not emit toxic gases, making it suitable for high-density indoor facilities, subways, and commercial complexes.
Low Maintenance
Without liquid levels to monitor, seals to replace, or oil purity tests to conduct, ongoing maintenance requirements are significantly minimized.
Eco-Friendly
The zero-oil design completely eliminates the risk of oil leakage or groundwater contamination, supporting your environmental sustainability goals.
Technical Specifications & Capabilities
HENTG manufactures distribution and power transformers strictly according to international parameters (such as IEC and CE). We offer custom configurations to match your exact electrical layouts:
| Technical Parameter | Specification Range |
|---|---|
| Rated Capacity | 50 kVA up to 5,000 kVA (Custom capacities available) |
| Primary Voltage | Up to 35 kV |
| Secondary Voltage | 0.4 kV, 0.48 kV, or customized to order |
| Insulation Class | Class F (155°C) or Class H (180°C) |
| Cooling Method | Air Natural (AN) / Forced Air (AF) with integrated cooling fans |
| Enclosure Level | IP00, IP20, IP23 (Custom indoor/outdoor options) |
Engineered for High-Reliability Operations
- Automated Temperature Control: Outfitted with responsive bottom-mounted cooling fans that activate automatically under heavy load, protecting the core from thermal degradation.
- Moisture and Salt-Spray Protection: Excellent choice for humid, offshore, and harsh coastal regions due to the protective epoxy resin shell.
- Exceptional Mechanical Strength: Fully vacuum-cast windings provide high resistance to short-circuit forces and electrical stresses.
Partner with an Experienced Manufacturer in China
As an experienced transformer manufacturer based in China, Jiangsu Hengtong Electric Co., Ltd. (HENTG) focuses on providing cost-effective, energy-efficient power equipment designed to meet diverse regional requirements.