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Help CenterDry Transformer With Mill Test Report for 440V to 220V Three-Phase Conversion SG-Type
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As a professional manufacturer, Jinhua Dika Electrical Equipment Co., Ltd. specializes in producing high-reliability electrical components for global industrial applications. Our Dry Transformer for 440V to 220V Three-Phase Conversion is engineered to provide a safe, efficient, and durable solution for voltage adaptation in diverse operational environments. With over a decade of experience and a commitment to stringent quality control, we deliver transformers that ensure stable power supply and protect sensitive downstream equipment.
This SG-Type transformer is designed for applications where a reliable step-down from 440V three-phase to 220V three-phase is required. Unlike liquid-filled transformers, our dry-type design eliminates the risk of leaks, reduces maintenance needs, and is environmentally friendly, making it suitable for installation indoors, in confined spaces, or in areas with strict fire safety regulations.
Core Product Features & Technical Advantages:
- Enhanced Safety & Reliability: Utilizes high-quality, class F or H insulation materials that offer excellent thermal stability and dielectric strength, ensuring long service life even under demanding load conditions.
- Superior Efficiency: Advanced core design and precision-wound copper or aluminum windings minimize no-load and load losses, contributing to lower operational energy costs.
- Robust Construction: The SG-Type design features a rigid mechanical structure with vibration-dampening elements, providing high short-circuit strength and resistance to mechanical stresses during transport and operation.
- Flexible Configuration: Available in various enclosure protection levels (IP00, IP20, IP23) to suit different environmental conditions, from clean electrical rooms to areas with potential dust or moisture exposure.
- Comprehensive Testing: Each unit undergoes rigorous factory tests, including ratio, polarity, winding resistance, and insulation resistance tests. A detailed Mill Test Report (MTR) is provided, documenting all key performance parameters and material certifications.
- Quiet Operation: Optimized core and winding design, along with secure mounting, results in low audible noise levels, making it appropriate for installations near offices or residential areas.
Technical Specifications Overview:
| Parameter | Typical Specification |
| Rated Primary Voltage | 440V, 3-Phase, 50/60Hz |
| Rated Secondary Voltage | 220V, 3-Phase, 50/60Hz |
| Rated Power Range | 5kVA to 3000kVA (customizable) |
| Insulation System | Class F (155°C) or Class H (180°C) |
| Temperature Rise | 80K, 100K, 115K, 150K (as per class) |
| Impedance Voltage | Typically 4% or 6% (customizable) |
| Cooling | AN (Air Natural) or AF (Air Forced) for higher ratings |
| Standards | IEC 60076, ANSI/IEEE C57.12.01 |
Benefits for Your Operations:
- Risk Mitigation: The dry-type design removes concerns associated with oil leaks, fire hazards, and environmental contamination, simplifying compliance with safety codes.
- Reduced Lifetime Cost: Lower maintenance requirements (no oil testing/filtering) and high efficiency translate into significant savings over the transformer's lifespan.
- Installation Flexibility: Lighter weight and compact design compared to equivalent oil-filled units allow for easier handling and more placement options within a facility.
- Power Quality: Provides stable, clean 220V three-phase power, protecting motors, drives, control systems, and other connected equipment from voltage irregularities.
- Global Compatibility: Designed to meet international electrical standards, facilitating integration into projects worldwide.
Trust and Quality Assurance:
Jinhua Dika Electrical Equipment operates a comprehensive quality management system, which is a cornerstone of our manufacturing process. Our commitment to excellence is reflected in our consistent annual export value and our ability to serve demanding markets across North America, Europe, Asia, and beyond. Every Dry Transformer shipped from our ports in Shanghai, Tianjin, Guangzhou, or Ningbo is backed by our rigorous production standards and accompanied by full traceability documentation, including the Mill Test Report. This report provides you with verified data on materials and performance, ensuring you receive a product that matches your specifications precisely.
Choosing our SG-Type Dry Transformer means investing in a component built for durability, efficiency, and safety. It is an ideal solution for factories, commercial buildings, water treatment plants, mining operations, and any facility requiring a dependable 440V to 220V conversion. Contact us today to discuss your specific power requirements and receive a detailed quotation.
Frequently Asked Questions (FAQ):
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Q: What is included in the Mill Test Report (MTR)?
A: The MTR is a certificate of analysis from the mill that produced the core and winding materials. It includes data on material grade, chemical composition, mechanical properties, and the results of all routine factory tests performed on the completed transformer (ratio, resistance, insulation tests). -
Q: Can this transformer be used for both 50Hz and 60Hz systems?
A: Yes, the design is typically suitable for both 50Hz and 60Hz operation. The specific rating will be confirmed based on your application's frequency to ensure optimal performance. -
Q: What are the main differences between Class F and Class H insulation?
A: Class H insulation can withstand higher operating temperatures (up to 180°C) compared to Class F (155°C). Choosing Class H can allow for a more compact design at the same power rating or provide an additional safety margin in high-ambient-temperature environments. -
Q: Is on-site installation support or commissioning available?
A: While detailed installation manuals are provided, on-site technical support and commissioning services can be arranged upon request for larger projects or complex installations. -
Q: How do I determine the correct kVA rating needed for my application?
A: The required kVA depends on the total connected load (in kW or kVA) and its characteristics (motor starting currents, etc.). Our technical team can assist you with the calculation based on your load details to recommend the appropriate transformer size. -
Q: What is the typical lead time for production?
A: Lead time varies based on the power rating, customization, and current order volume. Standard units often have shorter lead times, while larger or highly customized units may require more production planning. We provide estimated timelines upon order confirmation. -
Q: Are these transformers suitable for outdoor installation?
A: The standard enclosures (IP20, IP23) offer some protection against weather. For full outdoor installation, a higher IP rating enclosure or a protective weatherproof housing can be specified to ensure long-term reliability. -
Q: Do you offer warranties on your dry transformers?
A> Yes, we offer a standard warranty covering manufacturing defects. The specific warranty period and terms are provided with the commercial contract and are based on the product specifications and application.
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