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Help CenterSG-Type Dry Isolation Transformer With Warranty 440V Input 220V Output Three-Phase
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As a dedicated manufacturer of electrical equipment, Jinhua Dika Electrical Equipment Co., Ltd. is proud to present our SG-Type Dry Isolation Transformer. Engineered for reliability in demanding industrial environments, this transformer is specifically designed to safely and efficiently convert 440V three-phase input power to a stable 220V three-phase output. Our commitment to quality manufacturing, backed by a comprehensive warranty, ensures you receive a product that provides dependable power isolation, protects sensitive equipment from voltage fluctuations and electrical noise, and enhances overall system safety. We understand the critical role power quality plays in your operations, which is why we focus on delivering robust, maintenance-friendly solutions.
This transformer is constructed with a core-and-coil assembly utilizing high-grade, low-loss electrical steel laminations and copper or aluminum windings with Class H or higher insulation systems. The "dry-type" design means it uses air as the cooling and insulating medium, eliminating the risks, maintenance, and environmental concerns associated with liquid-filled transformers. This makes it suitable for installation in a wide range of indoor locations, including areas with strict fire safety codes. The unit is housed in a durable, ventilated enclosure that provides mechanical protection while allowing for optimal airflow.
Key Technical Specifications & Advantages:
- Superior Isolation & Safety: Provides complete galvanic isolation between the primary (input) and secondary (output) circuits. This effectively blocks the transmission of common-mode noise, transients, and harmonics from the power source to your connected load. It also helps in creating a separately derived system, which can improve ground fault protection and reduce shock hazards.
- Voltage Conversion & Stabilization: Precisely steps down the 440V three-phase supply to a usable 220V three-phase output. This stable voltage supply is crucial for protecting motors, CNC machines, PLCs, and other sensitive industrial equipment from damage caused by overvoltage or unstable grid conditions.
- Robust Construction for Long Life: Built with materials selected for durability and performance. The windings are vacuum pressure impregnated (VPI) with high-temperature insulating varnish to resist moisture, contaminants, and thermal cycling, ensuring long-term dielectric strength and reliability.
- Low Maintenance & Operational Cost: The dry-type design requires no periodic oil testing, filtering, or replacement. Its simple, rugged construction leads to minimal upkeep, reducing total cost of ownership over its extended service life.
- Flexible Configuration Options: While the standard model converts 440V to 220V, we offer customization for different input/output voltage combinations, kVA ratings, and additional features like temperature monitoring devices (RTD or thermocouple), protective enclosures (IP23, IP44), and special tap configurations upon request.
Typical Technical Parameters (Customizable):
| Parameter | Specification / Range |
| Input Voltage | 440V AC, 3-Phase, 50/60Hz |
| Output Voltage | 220V AC, 3-Phase, 50/60Hz |
| Power Rating (kVA) | Available from 1kVA up to 2500kVA (common range: 10kVA - 500kVA) |
| Insulation Class | Class H (180°C) or Class F (155°C) standard |
| Vector Group | Dyn11, Yyn0, or other as required |
| Impedance Voltage | Typically 4% or 6%, customizable |
| Noise Level | Designed for low acoustic noise emission |
| Cooling | AN (Air Natural) or AF (Air Forced) for higher ratings |
Benefits for Your Business:
- Equipment Protection: Shields valuable machinery from damaging power surges, spikes, and electrical noise, reducing downtime and repair costs.
- Enhanced Personnel Safety: The isolation barrier reduces the risk of electric shock, creating a safer working environment.
- Improved Power Quality: Delivers clean, stable power that can improve the performance and efficiency of connected equipment.
- Compliance & Versatility: Suitable for installations where oil-filled transformers are prohibited due to fire codes. Can be used in manufacturing plants, water treatment facilities, commercial buildings, hospitals, and renewable energy systems.
Jinhua Dika Electrical Equipment Co., Ltd. is not just a supplier; we are a manufacturing partner with a proven track record. With an annual export value ranging between US$1 Million and US$1.5 Million and a team of experienced professionals, we have successfully served diverse markets across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring reliable logistics. Our manufacturing processes are guided by a commitment to systematic quality management. This SG-Type Dry Isolation Transformer is built to be a cornerstone of your electrical system's reliability. Contact us today to discuss your specific kVA requirements, delivery timelines, and how this robust transformer can solve your power isolation and conversion challenges.
Frequently Asked Questions (FAQ)
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Q: What is the primary purpose of this SG-Type Isolation Transformer?
A: Its main functions are to safely step down voltage from 440V to 220V in a three-phase system and to provide complete electrical isolation between the input and output circuits. This protects downstream equipment and improves safety. -
Q: How does a "dry-type" transformer differ from an oil-filled one?
A: Dry-type transformers use air and solid insulation (like epoxy or varnish) for cooling and insulation, making them non-flammable, leak-proof, and lower maintenance. Oil-filled types use dielectric oil, which requires containment and periodic maintenance. -
Q: Is this transformer suitable for outdoor installation?
A: The standard enclosure is designed for indoor use. For outdoor installation, a higher ingress protection (IP) rated enclosure (e.g., IP44) is required and can be provided as a custom option to protect against rain and dust. -
Q: What does the included warranty cover?
A: The standard manufacturer warranty covers defects in materials and workmanship under normal use and service conditions. The specific warranty period and terms can be confirmed upon inquiry and are detailed in our sales agreement. -
Q: Can you provide transformers with different input/output voltages?
A: Yes, absolutely. While this listing is for a 440V-to-220V model, we manufacture a wide range of isolation transformers with various primary and secondary voltage combinations to suit different regional grids and application needs. -
Q: What information do you need to provide an accurate quotation?
A: Please provide the required power rating (kVA), specific input and output voltages and frequencies, desired vector group, impedance voltage, insulation class, enclosure IP rating, and any optional accessories (like temperature gauges or cabinets). -
Q: How is the transformer cooled, and does it require forced ventilation?
A: Smaller kVA ratings typically use Air Natural (AN) convection cooling. For larger ratings, Air Forced (AF) cooling with fans is used to enhance heat dissipation. The need for forced ventilation depends on the specific kVA rating you select. -
Q: Do you provide installation guidance or technical support?
A: Yes, we provide detailed installation and operation manuals with each unit. Our technical team is also available to offer support and answer questions regarding installation, commissioning, and troubleshooting.
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