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As a professional manufacturer with a strong export presence, Jinhua Dika Electrical Equipment Co., Ltd. specializes in providing robust and reliable power solutions for industrial applications worldwide. Our 35kVA 440V/220V Three-Phase Dry Isolation Transformer, SG-Type, is engineered to deliver superior electrical isolation, voltage transformation, and protection for sensitive equipment. Designed for demanding industrial environments, this transformer ensures stable power supply, mitigates electrical noise, and safeguards your machinery from voltage surges and ground loops, enhancing overall system longevity and operational safety.
This industrial-grade transformer is a core component for facilities requiring a step-down from 440V to 220V three-phase systems. Its dry-type construction, meaning it uses air or solid insulation instead of liquid coolant, offers significant advantages in safety, maintenance, and environmental friendliness, making it suitable for installation in a wide range of locations, including those with strict fire safety regulations.
Core Features & Technical Advantages:
- High-Efficiency Design: Constructed with high-quality grain-oriented silicon steel cores and copper or aluminum windings (specify upon request) to minimize no-load and load losses, leading to energy savings over the transformer's lifespan.
- Superior Isolation & Protection: Provides complete galvanic isolation between primary and secondary circuits. This effectively blocks the transmission of harmonic distortion, electrical noise, and transient voltage spikes from the supply side to your valuable equipment.
- Robust SG-Type Construction: The SG-type refers to a specific, rugged design with open or enclosed construction, offering excellent mechanical strength, heat dissipation, and reliability for continuous industrial duty cycles.
- Enhanced Safety & Low Maintenance: Being dry-type and flame-retardant, it eliminates risks associated with oil leaks, fires, or toxic fumes. It requires minimal maintenance compared to liquid-filled units.
- Flexible Configuration Options: Available with various tap changers (e.g., ±2x2.5% or ±5%) on the primary side to compensate for input voltage variations. Terminal arrangements, enclosure types (IP20, IP23, IP44), and mounting options can be customized.
- Quiet Operation: Advanced core design and secure winding construction ensure low audible sound levels, contributing to a better working environment.
Technical Specifications Table:
| Parameter | Specification |
| Rated Capacity | 35 kVA |
| Frequency | 50/60 Hz (Dual Frequency) |
| Primary Voltage | 440 V (3-Phase) |
| Secondary Voltage | 220 V (3-Phase) |
| Vector Group | Dyn11, Yyn0, or as required |
| Insulation Class | H-Class (180°C) |
| Temperature Rise | ≤ 120K (at rated load) |
| Impedance Voltage | Typically 4% (Customizable) |
| Noise Level |
Benefits for Your Business:
- Equipment Longevity: Protects motors, CNC machines, PLCs, and other sensitive electronics from damaging power quality issues, reducing downtime and repair costs.
- Operational Safety: Creates a safer electrical environment for personnel by isolating circuits and using non-flammable materials.
- Compliance & Versatility: Its dry-type design often meets building and electrical codes for indoor installation without a vault, offering greater placement flexibility in factories, workshops, and commercial buildings.
- Total Cost of Ownership: Lower installation costs (no containment pits or oil monitoring systems) and reduced maintenance lead to a favorable lifecycle cost.
Jinhua Dika Electrical is a trusted partner in the global industrial market, serving clients across North America, South America, Europe, Asia, Africa, and Oceania. Our commitment to quality is supported by a comprehensive management system, and we have the capability to ship efficiently from major Chinese ports like Shanghai, Tianjin, Guangzhou, and Ningbo. With an annual export value reflecting our reliability and a team dedicated to precision engineering, we ensure every transformer meets stringent performance standards.
Choosing our 35kVA Dry Isolation Transformer means investing in a power protection solution that combines safety, efficiency, and durability. It is an ideal choice for machine shops, packaging plants, industrial automation lines, and any facility requiring reliable 440V to 220V three-phase power conversion. Contact us today to discuss your specific requirements, request a detailed datasheet, or to learn more about our customizable options and competitive pricing.
Frequently Asked Questions (FAQ):
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Q: What is the main purpose of this isolation transformer?
A: Its primary purposes are to safely step down voltage from 440V to 220V for three-phase equipment and to provide galvanic isolation. This isolation protects downstream machinery from electrical noise, surges, and ground loop problems present on the primary supply. -
Q: Can this transformer be used outdoors?
A: The standard enclosure is IP20 for indoor use. For outdoor or harsh environments, we offer upgraded enclosures with higher ingress protection ratings like IP23 (for weather protection) or IP44 (for dust and water splash protection). Please specify your installation environment. -
Q: What are the winding material options?
A: Windings are typically made from high-conductivity copper for optimal efficiency and compact size, or aluminum for a cost-effective alternative. The specific material and design can be discussed based on your efficiency targets and budget. -
Q: Does it come with built-in thermal protection?
A: Standard units include temperature sensors (e.g., PT100) embedded in the windings for temperature monitoring. For automatic protection, a separate thermal relay or control unit with alarm/trip functions can be supplied as an accessory. -
Q: What is the typical delivery lead time?
A: For standard specifications, lead time is generally within 15-25 working days after order confirmation. Lead times for customized specifications (special voltages, taps, enclosures) may vary and will be confirmed upon quotation. -
Q: Are technical drawings and installation manuals provided?
A: Yes, comprehensive documentation including outline drawings, wiring diagrams, weight & dimensions, and a detailed installation & operation manual is provided with each unit to facilitate correct and safe installation. -
Q: Can you provide different input/output voltage combinations?
A: Absolutely. While 440V/220V is a common specification, we manufacture transformers with a wide range of primary and secondary voltages (e.g., 415V/240V, 480V/208V). Please inquire with your specific voltage requirements. -
Q: What after-sales support do you offer?
A: We provide technical support for selection, installation guidance, and troubleshooting. A standard warranty period is offered, and spare parts for key components are available to ensure long-term operational support.
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