3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer

3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva  Oil Immersed Transformer

1. Product Description

3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer is a high-performance medium-capacity three-phase oil immersed distribution transformer tailored for international industrial power distribution, overseas engineering construction and special voltage standard power supply scenarios. Covering three mainstream industrial capacities of 500kVA, 630kVA and 800kVA, this 20kV class oil immersed transformer is professionally designed to convert standard 20kV medium-voltage grid power into stable 440V three-phase low-voltage electricity, perfectly matching the operating voltage requirements of European, American and Southeast Asian industrial electrical equipment. Manufactured based on upgraded S13 ultra-low-loss technology and fully compliant with IEC 60076 international power transformer standards and CE certification specifications, this 3-phase 20kV to 440V oil immersed power transformer solves the common voltage mismatch problem between domestic 20kV medium-voltage power grids and imported 440V standard mechanical equipment.

Different from conventional 20kV/400V general-purpose oil immersed transformers, this customized 20kv 440v industrial transformer adopts optimized winding turn ratio design to ensure accurate 440V output voltage, effectively avoiding equipment startup failure and operational aging caused by voltage deviation. The whole machine adopts high-purity oxygen-free copper windings and high-permeability grain-oriented silicon steel core materials, which greatly reduce no-load loss and full-load operating heat during long-term continuous operation. With a standard Dyn11 vector group structure, the equipment maintains excellent three-phase current balance and harmonic suppression capability, effectively improving terminal power supply quality for precision industrial equipment. Equipped with a fully sealed corrugated oil tank and mature ONAN oil natural air natural cooling system, this heavy-duty oil filled transformer completely isolates internal insulating components from external dust, moisture and corrosive gases, preventing insulating oil aging and oil leakage faults. Featuring diversified capacity matching and strong environmental adaptability, it has become the most widely used medium-capacity voltage conversion equipment for overseas industrial projects and special power distribution systems.

2. Main Technical Parameters

Below are the complete standardized technical parameters of 3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer. All electrical performance indicators, cooling modes, insulation levels and structural specifications meet international first-class energy efficiency standards and grid access requirements, supporting accurate model selection, professional on-site installation and daily operational maintenance for industrial and engineering projects:

3. Core Purpose

The core purpose of 3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer is to resolve the voltage standard mismatch between 20kV medium-voltage power grids and international 440V industrial electrical equipment. Most domestic medium-voltage power distribution systems adopt 20kV to 400V voltage conversion standards, which cannot meet the power supply requirements of imported production lines, overseas standard machinery and special industrial electrical devices. This professional 20kV 440V three-phase oil immersed transformer provides accurate and stable voltage conversion, converting standard 20kV grid power into 440V three-phase industrial power that fully complies with international electrical norms.

In actual industrial power distribution operations, this medium-capacity oil immersed distribution transformer undertakes multiple key functional roles including voltage standardization, power load balancing, grid harmonic suppression and circuit safety isolation. The 500kVA model adapts to medium-light load industrial power demands, the 630kVA model serves as the most cost-effective universal capacity for most international engineering projects, and the 800kVA high-capacity version meets continuous heavy-load industrial power consumption requirements. While ensuring precise 440V voltage output, the equipment effectively reduces power transmission loss, improves terminal power supply stability, avoids equipment failure caused by voltage deviation, and provides safe, compliant and reliable power guarantee for overseas engineering construction, foreign-funded factory production and special industrial power distribution systems.

4. Application Scenarios

With dedicated 20kV to 440V voltage conversion performance, multi-capacity flexible matching, ultra-low energy loss and excellent outdoor environmental adaptability, 3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer is widely used in international industrial power supply, foreign-funded enterprise power transformation and special voltage standard power distribution scenarios. It is the preferred medium-capacity power transformation equipment for cross-border engineering and special industrial projects:

• Foreign-funded Factory Power Distribution Renovation: Widely applied in Sino-foreign joint ventures and wholly foreign-owned industrial parks equipped with European and American imported automated production lines. It converts 20kV urban grid power into standard 440V industrial voltage to match the operating parameters of imported precision equipment, ensuring stable and efficient production operation.

• Overseas EPC Engineering Power Supply: Ideal for overseas infrastructure construction, industrial park development and mechanical engineering projects in Southeast Asia, Africa and the Middle East. The 440V output standard fully conforms to local industrial power supply norms, realizing seamless docking with local electrical equipment.

• Port & Marine Supporting Power System: Suitable for port terminal handling equipment, offshore engineering auxiliary facilities and marine supporting electrical systems. The oil immersed fully sealed structure resists humid and corrosive port environments, and stable 440V output meets special marine industrial power consumption standards.

• Special Mechanical Equipment Supporting Power: Used for large mining machinery, construction equipment and industrial general machinery that adopts 440V voltage standard. It solves the problem of unable normal startup and low operating efficiency caused by voltage mismatch of imported equipment.

• Industrial Park Standardized Power Transformation: Applied in domestic export-oriented industrial parks for unified power system upgrading. It replaces traditional 400V output transformers to support centralized power supply for batch imported equipment, realizing standardized and unified industrial power distribution.

• Mining & Field Industrial Power Supply: Matched with field mining and outdoor engineering operation systems. The 20kV high-voltage input adapts to long-distance power transmission of mining areas, and 440V stable output ensures continuous operation of field industrial equipment in harsh environments.

5. Product Features

3 Phase 20kv 440v Transformer Electricity 500kva 630kva 800kva Oil Immersed Transformer adopts upgraded S13 ultra-low-loss oil immersed manufacturing technology and customized 440V dedicated voltage conversion structure. Compared with conventional 20kV/400V general-purpose transformers and dry-type distribution transformers, this series has prominent practical advantages in voltage accuracy, energy-saving performance and industrial environmental adaptability, fully meeting long-term continuous heavy-duty operation requirements of international industrial projects:

• Customized 20kV to 440V Precise Voltage Conversion: Different from universal 400V output transformers, this industrial oil immersed transformer adopts professionally optimized winding turn ratio design to achieve accurate 440V low-voltage output with strictly controlled low voltage deviation. It completely matches international industrial voltage standards, effectively avoiding equipment aging, shutdown and burnout caused by long-term voltage mismatch.

• Three-capacity Flexible Engineering Matching: Covering 500kVA, 630kVA and 800kVA three mainstream medium and large capacities, it can accurately cover medium-light load, conventional load and medium-heavy load industrial power demands. Users can select targeted models according to actual equipment total power and peak load to avoid capacity waste or insufficient load margin, with ultra-high project compatibility.

• Ultra-low Loss & High Energy-saving Efficiency: Adopting high-permeability ultra-low loss silicon steel core and high-conductivity pure copper windings, the transformer minimizes no-load magnetic loss and full-load operating loss during voltage conversion. All energy efficiency indicators reach national and international first-class energy efficiency standards, effectively reducing long-term industrial power consumption and project operation costs.

• Dyn11 Balanced Output & Excellent Power Quality: Standard Dyn11 three-phase winding structure ensures balanced three-phase voltage and current operation. It can effectively filter grid harmonics generated by industrial equipment operation, suppress zero-sequence current and solve three-phase load imbalance problems, maintaining stable power output under complex industrial load conditions.

• Fully Sealed Maintenance-free Oil Immersed Structure: Integral fully welded corrugated oil tank forms a closed anti-leakage structure, which completely isolates internal insulating oil and core windings from external moisture, dust and corrosive gases. It prevents insulating oil aging and insulation damp, eliminates common oil leakage faults, and realizes long-term maintenance-free outdoor operation to reduce after-sales maintenance costs.

• Strong All-weather Environmental Adaptability: Adopting heavy-duty anti-corrosion electrostatic spraying and 20kV high-grade insulation design, the equipment resists high temperature, low temperature, rain erosion and wind sand aging. The mature ONAN natural oil circulation cooling system ensures uniform and stable heat dissipation, supporting 24-hour uninterrupted operation in industrial parks, field mining areas and coastal humid environments.

6. FAQ (Frequently Asked Questions)

Q1: Why choose 20kV 440V oil immersed transformer instead of conventional 400V model for imported equipment projects?

Conventional 20kV 400V transformers are designed for domestic civilian and ordinary industrial equipment standards, while most imported European and American mechanical equipment, automated production lines and marine electrical facilities are tailored for 440V voltage operation. If using a 400V transformer to supply power for 440V equipment, long-term under-voltage operation will occur, leading to reduced equipment operating efficiency, frequent startup failures, accelerated component aging and even permanent burnout. This dedicated 20kV 440V oil immersed transformer features precise voltage output matching international standards, which can fully guarantee the rated operating state of imported equipment, improve production stability and extend the service life of industrial machinery.

Q2: How to select the right capacity among 500kVA, 630kVA and 800kVA for industrial projects?

Capacity selection should be based on actual continuous operating load and future project expansion plans. The 500kVA model is suitable for small and medium-sized foreign-funded workshops and medium-light load industrial scenarios, with lower no-load loss and better energy-saving performance under conventional load operation. The 630kVA capacity is the most cost-effective universal model, widely applicable to most standard overseas engineering projects and export-oriented industrial parks, balancing load capacity and project cost perfectly. The 800kVA high-capacity version is recommended for production lines with frequent peak load surges and projects with later capacity expansion demands, reserving sufficient overload margin to avoid equipment overload tripping and secondary equipment replacement.

Q3: What are the advantages of oil immersed type compared with dry type for outdoor 20kV industrial power distribution?

For outdoor long-term unattended industrial operation and 20kV medium-voltage power distribution scenarios, oil immersed transformers have obvious practical advantages. First, the ONAN natural oil circulation cooling system provides more uniform and stable heat dissipation, with stronger continuous full-load operation capability and better transient overload resistance than dry-type transformers. Second, the fully sealed oil tank structure has superior moisture-proof, dust-proof and anti-corrosion performance, adapting to harsh outdoor environments such as field mining areas and coastal ports where dry-type equipment is prone to damp aging and insulation failure. In addition, 20kV medium-capacity oil immersed transformers have lower manufacturing cost, more stable long-term operation performance and longer service life, which is more suitable for large-scale popularization in industrial power transformation and overseas engineering projects.