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Help CenterDry-Type Isolation Transformer for CNC Machine Power Supply 440V to 220V Three-Phase
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As a specialized manufacturer with over a decade of experience, Jinhua Dika Electrical Equipment Co., Ltd. is proud to present our high-performance Dry-Type Isolation Transformer designed specifically for CNC machine power supply applications. Engineered to convert 440V three-phase power down to a stable 220V three-phase output, this transformer is a critical component for protecting sensitive CNC equipment from power grid anomalies, ensuring operational safety and enhancing machine longevity. Our commitment to stringent quality control, evidenced by our ISO 9001 certification among others, ensures every unit delivers reliable, clean power isolation.
This transformer is not just a component; it's an investment in the stability and productivity of your manufacturing operations. By isolating your CNC machinery from common power issues such as voltage spikes, harmonics, and ground loops, it significantly reduces the risk of costly downtime and component failure.
Core Features & Technical Advantages:
- Enhanced Equipment Protection: Provides galvanic isolation, effectively shielding CNC controllers, drives, and sensors from electrical noise, transients, and potential ground faults on the primary side.
- Voltage Stabilization: Steps down the incoming 440V supply to a precise 220V, creating a safe and compatible power environment for a wide range of CNC machines.
- Dry-Type Construction: Utilizes vacuum pressure impregnated (VPI) coils and high-grade insulation materials. This design eliminates the risks and maintenance associated with liquid-filled transformers, making it safer, environmentally friendly, and suitable for installation indoors or in confined spaces.
- High Efficiency & Low Losses: Built with high-quality silicon steel cores and copper windings to minimize core and copper losses, leading to energy savings and cooler operation over extended periods.
- Robust & Durable Design: The enclosure is typically constructed from cold-rolled steel with a corrosion-resistant finish. Internal components are securely mounted to withstand vibration, a common factor in industrial settings.
- Flexible Configuration: Available in a range of standard kVA ratings to match your specific CNC machine's power requirements. Custom taps, protective covers, and higher IP protection ratings for dusty environments are available upon request.
Key Technical Specifications:
| Parameter | Specification |
| Input Voltage (Primary) | 440V AC, 3-Phase, 50/60Hz |
| Output Voltage (Secondary) | 220V AC, 3-Phase, 50/60Hz |
| Rated Capacity Range | Commonly from 5kVA to 150kVA (Customizable) |
| Insulation Class | Class F (155°C) or Class H (180°C) standard |
| Cooling | AN (Air Natural) |
| Winding Material | High Conductivity Copper |
| Core Material | High-Grade, Low-Loss Silicon Steel |
| Enclosure Protection | Standard IP20 (IP23, IP54 optional) |
| Temperature Rise | ≤ 100K (for Class F insulation) |
Benefits for Your CNC Operation:
- Minimized Downtime: Protects against power-related tripping and damage, ensuring continuous production runs.
- Improved Machine Accuracy: Clean, isolated power reduces signal interference, leading to more precise machining and better product quality.
- Extended Equipment Life: Reduces thermal and electrical stress on CNC components, lowering long-term maintenance costs.
- Safety Compliance: Provides a safe isolated supply, helping to meet electrical safety standards in the workshop.
- Easy Integration: Compact, dry-type design allows for flexible installation near the machine without special foundation or containment.
Frequently Asked Questions (FAQ):
Q1: Why is an isolation transformer necessary for my CNC machine instead of a simple step-down transformer?
A: While both can change voltage, an isolation transformer provides a physical separation (galvanic isolation) between the primary and secondary windings. This barrier blocks electrical noise, harmonics, and transient voltages from the mains from reaching your sensitive CNC electronics, offering superior protection that a basic step-down transformer does not.
Q2: How do I select the correct kVA rating for my transformer?
A: The rating should be equal to or greater than the total connected load of your CNC machine(s). Check the machine's nameplate for its maximum input kVA or ampere rating. It's advisable to include a 20-25% safety margin for inrush currents during startup. Our technical team can assist you with this calculation.
Q3: What is the difference between Class F and Class H insulation?
A: The class indicates the maximum temperature the insulation system can withstand. Class F allows for a 155°C temperature rise, while Class H allows for 180°C. Class H offers a higher thermal margin, which can be beneficial in environments with high ambient temperatures or for applications expecting heavy, sustained loads.
Q4: Can this transformer be used outdoors?
A: The standard IP20 enclosure is for indoor use. For outdoor installation, you must specify a higher ingress protection rating, such as IP23 (for sheltered outdoor) or IP54 (for dust and water splash protection). Custom enclosures are available.
Q5: Do you provide custom input/output voltage combinations?
A: Yes. While 440V to 220V is a common requirement, we can manufacture transformers for various other three-phase and single-phase voltage conversions (e.g., 480V to 240V, 415V to 220V). Please provide your specific requirements.
Q6: What is the typical lead time for an order?
A: Lead time depends on the specification and order quantity. For standard models, it is typically 2-4 weeks. We maintain efficient production processes to ensure timely delivery, supported by our established export channels through major ports like Shanghai, Ningbo, and Guangzhou.
Q7: How does your manufacturing quality assurance work?
A: Our production follows a rigorous quality management system certified under ISO 9001. Each transformer undergoes multiple tests, including turns ratio, insulation resistance, dielectric strength (hipot), and no-load/loss measurements before shipment.
Q8: What are the main advantages of sourcing from your company?
A: As a direct manufacturer, we offer competitive pricing, design flexibility for custom requirements, and full traceability. With an annual export value in the range of US$1-1.5 million and a presence in global markets from North America to Southeast Asia, we have the experience and capacity to be a reliable long-term partner.
Backed by Jinhua Dika's robust manufacturing capabilities and a portfolio of international quality certifications including ISO 9001 and ISO 14000, this Dry-Type Isolation Transformer represents a fusion of reliability and performance. Our products have earned trust across diverse markets, from North America and Western Europe to Southeast Asia and Africa. We combine this global experience with a responsive approach to customer needs, offering customizable solutions and reliable logistics through key Chinese ports. Choose a power protection solution engineered for durability and precision. Contact us today to discuss your specific CNC power supply requirements and receive a detailed quotation.
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