6kv-15kV 50-3150kVA Three Phase Distribution Oil Immersed Transformer 50/60Hz Frequency

6kv-15kV 50-3150kVA Three Phase Distribution Oil Immersed Transformer 50/60Hz Frequency

1. Product Description

The 6kV-15kV 50-3150kVA Three Phase Distribution Oil Immersed Transformer is a standard medium-voltage power distribution device designed for global industrial and civil power grid systems, supporting dual 50Hz and 60Hz operating frequencies to adapt to regional power standards worldwide. This full-series oil immersed distribution transformer covers complete capacity specifications ranging from small 50kVA, 100kVA, 160kVA to medium 630kVA, 1250kVA and large 2500kVA, 3150kVA, fully meeting differentiated power transformation and distribution demands for low and medium-load scenarios.

Manufactured with high-performance low-loss silicon steel cores and high-purity oxygen-free copper windings, this three-phase oil immersed power transformer adopts advanced fully sealed vacuum oil injection technology. The professional oil immersion cooling and insulation structure effectively solves heat accumulation and insulation aging problems during long-term full-load operation. Rated for 6kV to 15kV medium voltage input, the equipment realizes stable step-down conversion to standard low-voltage output, serving as the core power conversion unit for overhead distribution networks, industrial substations and new energy power supply systems. All products comply with IEC 60076 and IEEE C57 international power equipment standards, with strict factory testing for partial discharge, withstand voltage and load operation to ensure consistent field performance.

2. Core Product Features

2.1 Full-Series Capacity & Wide Voltage Compatibility

This three-phase oil immersed distribution transformer features a complete capacity portfolio spanning 50kVA to 3150kVA, covering almost all conventional medium-voltage distribution load requirements. It supports universal 6kV-15kV medium voltage grade adaptation and dual 50/60Hz grid frequency operation, compatible with domestic and overseas industrial power grids, urban and rural distribution networks. Users can select matched capacity specifications according to actual load power, avoiding equipment overload operation or power redundancy, greatly improving the matching degree of power distribution equipment and engineering projects.

2.2 Low Loss & High Energy Efficiency Performance

Adopting optimized core winding layout and low-loss magnetic core materials, the transformer effectively reduces no-load loss and load loss during continuous operation. Compared with traditional old-generation distribution transformers, this upgraded oil immersed model delivers higher overall power conversion efficiency and lower operating energy consumption. The stable electromagnetic structure minimizes reactive power loss in power transmission, helping power supply enterprises and industrial factories reduce grid operation costs and meet modern energy-saving and emission-reduction standards for power distribution systems.

2.3 Reliable Oil Immersed Cooling & Insulation System

Equipped with high-quality insulating transformer oil and fully sealed corrugated tank structure, the equipment achieves efficient circulating heat dissipation through oil convection. External corrugated fins expand the heat dissipation area, realizing automatic temperature adjustment without additional cooling fans, ensuring stable temperature rise control even under long-term full-load and overload conditions. The vacuum oil injection process isolates internal oil from air contact, preventing oil aging, moisture intrusion and insulation performance degradation, which significantly extends the service life of internal windings and core components.

2.4 Excellent Operational Stability & Safety Protection

Built with standard industrial safety configurations including Buchholz relay, pressure relief valve, oil level indicator and temperature monitoring device, the transformer provides real-time monitoring and automatic protection against overvoltage, overcurrent, short circuit and overheating faults. The reinforced three-phase winding structure ensures balanced three-phase voltage and current output, effectively resisting grid surge interference and instantaneous load impact. The fully sealed anti-leakage design eliminates oil leakage risks, adapting to long-term unattended outdoor and indoor substation operation.

2.5 Strong Environmental Adaptability & Low Maintenance

The overall structure adopts anti-corrosion paint treatment, with excellent rainproof, dustproof and weather resistance, capable of stable operation in high temperature, low temperature, humid and dusty outdoor environments. Without oil conservator design, the whole machine structure is more compact and reliable, requiring no regular oil replacement or oil sample testing in daily operation. The low-failure-rate design greatly reduces later maintenance workload and operation and maintenance costs, suitable for long-term continuous grid operation.

3. Core Purpose

As the key medium-voltage power transformation and distribution equipment in power grid systems, the 6kV-15kV 50-3150kVA three-phase oil immersed distribution transformer is mainly used for step-down conversion, voltage stabilization and safe power distribution of medium-voltage power grids. It converts 6kV-15kV high medium voltage into standard usable low-voltage power, providing stable and reliable power support for terminal industrial equipment, civil buildings and public facilities.

In addition to basic power conversion functions, this 50/60Hz dual-frequency transformer also optimizes grid power quality, balances three-phase load distribution, reduces line transmission loss, and improves the overall stability and safety of medium and low-voltage distribution networks. It undertakes core power supply guarantee tasks for urban grid renovation, rural power grid upgrading, industrial park power matching and new energy grid-connected power distribution, and is an indispensable basic equipment in power transmission and distribution systems.

4. Application Scenarios

4.1 Urban & Rural Power Grid Distribution

Widely applied in urban community power distribution, urban overhead line transformation, rural power grid upgrading and township centralized power supply projects. Small and medium-capacity models from 50kVA to 1250kVA perfectly match the daily power consumption load of residential areas and township public facilities. The 6kV-15kV wide voltage adaptation capability fully meets the voltage grade requirements of urban and rural medium-voltage branch networks, effectively improving the coverage and reliability of civilian power supply.

4.2 Industrial Park & Factory Power Supply

Medium and large-capacity specifications such as 1600kVA, 2500kVA and 3150kVA are widely used in industrial parks, manufacturing factories, mechanical processing bases and mining enterprise power distribution systems. They provide stable medium-to-low voltage power conversion for automated production lines, heavy mechanical equipment, workshop power distribution cabinets and industrial control systems. The strong overload resistance and stable output performance ensure the continuous and safe operation of industrial production equipment.

4.3 New Energy Power Generation & Grid Connection

Suitable for distributed photovoltaic power stations, wind power generation systems and energy storage power supply projects. The 50/60Hz dual-frequency design and stable voltage regulation performance can effectively adapt to fluctuating power output of new energy generation equipment, realize safe grid-connected power transmission and on-site load power supply, and solve the problems of unstable voltage and unbalanced power in new energy power distribution systems.

4.4 Public Facilities & Commercial Power Distribution

Applied in shopping malls, office buildings, hospitals, schools, traffic engineering and municipal public facilities power supply scenarios. The low-noise, high-stability and high-safety characteristics of the equipment meet the high-standard power supply requirements of public and commercial places, avoiding power supply interruption and equipment failure caused by voltage fluctuation, and ensuring the stable operation of public electrical equipment and building power distribution systems.

4.5 Outdoor Substation & Engineering Temporary Power

Thanks to excellent weather resistance and compact sealed structure, the transformer is suitable for outdoor box-type substations, field engineering power distribution and remote regional power supply. It can adapt to harsh outdoor working environments, providing reliable power transformation support for construction sites, road engineering and remote unattended power supply areas.

5. FAQ (Frequently Asked Questions)

Q1: What is the difference between 50Hz and 60Hz operating modes of this oil immersed distribution transformer?

This three-phase distribution transformer supports dual 50/60Hz frequency adaptive operation to meet the power grid standards of different countries and regions. In actual operation, the 50Hz mode is mainly applicable to most Asian, European and African power grids, while the 60Hz mode matches American and Southeast Asian regional grid standards. The internal electromagnetic structure is optimized for dual-frequency adaptation, which will not cause increased loss or unstable operation due to frequency switching. Users only need to confirm the local grid frequency during installation, and the equipment can operate stably without additional parameter adjustment.

Q2: How to select the correct capacity from 50kVA to 3150kVA for engineering projects?

Capacity selection depends on the total actual load power and long-term power expansion demand of the project. 50kVA-630kVA small and medium capacities are suitable for residential communities, rural power grids, small commercial buildings and single workshop power supply. 1000kVA-2000kVA medium-large capacities are preferred for medium-sized factories and regional centralized power distribution. 2500kVA-3150kVA large capacities are applicable to large industrial parks, large photovoltaic power stations and comprehensive municipal power distribution projects. It is recommended to reserve 15%-20% power margin to prevent long-term full-load operation and extend equipment service life.

Q3: What daily maintenance work is required for fully sealed oil immersed transformers?

This fully sealed 6kV-15kV oil immersed transformer adopts vacuum sealed structure with no need for frequent oil replacement and internal maintenance in daily use. Regular inspection items include checking whether the shell is corroded or deformed, confirming the normal oil level through the oil level gauge, observing whether there is oil leakage at the welding port, and verifying the sensitivity of temperature monitoring and pressure relief devices. During peak power consumption seasons, simply check the operating temperature and three-phase voltage balance. Compared with traditional open-type transformers, it greatly reduces maintenance frequency and long-term operation cost.