1. Product Description
The 20kV 400V 100kVA 125kVA 160kVA Oil Immersed Distribution Transformers are high-efficiency, three-phase medium-voltage power distribution equipment designed for 50Hz/60Hz AC power grid systems. As mainstream low-capacity oil-filled distribution transformers in urban and rural power grids, this series includes three core rated capacities: 100kVA, 125kVA and 160kVA, with a high voltage input of 20kV and a low voltage output of 400V, perfectly matching conventional low-voltage power distribution terminal requirements. Adopting advanced fully sealed corrugated tank technology and CRGO cold-rolled grain-oriented silicon steel core materials, these transformers effectively reduce no-load loss and operating noise, featuring stable voltage conversion performance and excellent environmental adaptability.
This series of low loss 20kV oil immersed distribution transformers follows international IEC standards and national power industry specifications, with a classic Dyn11 vector group design. The overall structure is compact with a small footprint, integrating vacuum oil injection and fully sealed anti-oxidation technology. It avoids the defects of traditional conservator-type transformers such as oil deterioration and moisture ingress, achieving a service life of more than 30 years under normal operating conditions. Covering the common capacity range of small and medium power distribution scenarios, the 100kVA, 125kVA and 160kVA models can meet the power demand differences of different terminal loads, and are the most cost-effective medium voltage oil filled power transformers for civil and industrial distribution systems.
2. Core Application Purposes
2.1 Medium and Low Voltage Power Conversion
The core function of 20kV to 400V oil immersed distribution transformers is to step down 20kV medium-voltage grid electricity to standard 400V low-voltage industrial and civil power, realizing safe and efficient voltage conversion for power grid terminal distribution. It solves the voltage matching problem between medium-voltage transmission lines and low-voltage electrical equipment, ensuring the stable operation of all kinds of 400V-class power consumption equipment.
2.2 Grid Power Distribution and Load Regulation
As key terminal power distribution equipment, the 100kVA, 125kVA and 160kVA capacity models are used for hierarchical power distribution of regional power grids. They can flexibly undertake distributed power loads, balance regional power supply pressure, and effectively improve the power supply reliability of urban and rural power grids. At the same time, the transformers have strong overload capacity, which can cope with short-term peak power consumption fluctuations and avoid power supply interruption caused by load surge.
2.3 Power Quality Optimization and Energy Saving Operation
This series of energy-saving oil immersed distribution transformers can effectively reduce grid transmission loss and no-load power consumption during long-term standby operation. Its stable output voltage and low harmonic interference characteristics optimize terminal power quality, reduce equipment failure rate caused by voltage fluctuation, and realize long-term energy-saving and low-consumption operation of power distribution systems, complying with global energy-saving and emission reduction standards for power equipment.
3. Typical Application Scenarios
3.1 Urban and Rural Power Grid Renovation Projects
The 20kV 400V 100kVA/125kVA/160kVA oil immersed transformers are widely used in new construction and upgrading of urban residential areas, rural power grids and community power distribution stations. The three capacity specifications cover the power demand of ordinary residential communities, rural centralized power supply and urban street terminal distribution. With strong environmental adaptability, they can operate stably in outdoor open-air environments and adapt to complex weather conditions such as high temperature, rain and humidity, making them the mainstream equipment for grassroots power grid construction.
3.2 Small and Medium Industrial Factory Power Distribution
Suitable for power supply and distribution of small processing factories, light industrial workshops, textile factories and chemical small enterprises. The 100kVA model is for small-load single-workshop power supply, the 125kVA model matches medium-load production lines, and the 160kVA model meets the power demand of multi-equipment parallel operation in small and medium factories. The weatherproof sealed oil immersed transformer design can resist industrial dust and corrosive gas, adapting to harsh factory production environments.
3.3 Commercial and Public Infrastructure
It is applicable to power distribution of shopping malls, office buildings, schools, hospitals, scenic spots and other public facilities and commercial venues. The equipment operates stably with low noise, which will not interfere with the working and living environment. Its reliable continuous power supply capacity ensures the normal operation of lighting, air conditioning, office equipment and public service electrical systems of commercial and public buildings.
3.4 New Energy and Off-Grid Power Supply Scenarios
In recent years, it has become a hot application for 20kV low-capacity oil immersed distribution transformers to support distributed photovoltaic power generation, small wind power systems and rural off-grid power supply projects. The 100-160kVA capacity range is perfectly compatible with small-scale new energy power generation terminal voltage conversion and grid-connected power distribution needs, helping new energy power consumption and local grid auxiliary power supply.
4. Core Product Features
4.1 Ultra-Low Loss and Energy-Saving Performance
Adopting high-quality CRGO silicon steel sheets as the core material and optimized core lamination technology, this series of transformers achieve extremely low no-load loss and load loss. Compared with traditional ordinary transformers, the energy-saving efficiency is increased by more than 15%, which greatly reduces long-term operating power consumption and operation cost. The 100kVA, 125kVA and 160kVA models all meet international secondary energy-saving standards, belonging to high-efficiency low noise oil immersed distribution transformers.
4.2 Fully Sealed and High Durability Structure
The whole machine adopts fully sealed corrugated oil tank design, canceling the traditional conservator structure. It effectively isolates air and moisture, prevents transformer oil oxidation and insulation aging, and avoids internal component corrosion. The vacuum full oil injection process ensures no internal air residue, greatly improving insulation performance and equipment durability. The overall mechanical structure is firm, with strong seismic and anti-collision ability, adapting to long-term outdoor and industrial harsh environment operation.
4.3 Stable Performance and Strong Safety
Equipped with high-purity copper windings with excellent conductivity and short-circuit resistance, the transformer has strong overload operation capability and can resist instantaneous short-circuit impact. The Dyn11 vector group design ensures balanced three-phase voltage output, small voltage fluctuation and high power supply stability. It is equipped with over-temperature, over-voltage and overload protection functions, with complete safety protection mechanisms, effectively avoiding equipment failure and power supply accidents.
4.4 Compact Design and Easy Installation Maintenance
The product has a compact overall layout, small floor space and light overall weight, which reduces the construction space and foundation investment of power distribution stations. The standardized interface design realizes convenient on-site installation and commissioning. The fully sealed structure basically realizes maintenance-free operation in the whole service cycle, greatly reducing later maintenance labor cost and time cost, with extremely high operational economy.
4.5 Wide Environmental Adaptability
This series of 20kV 400V oil immersed power distribution transformers can work stably in the temperature range of -40℃ to +45℃, adapting to extreme cold and high-temperature regions. It has excellent dust-proof, moisture-proof and corrosion-resistant properties, suitable for outdoor open-air, suburban, industrial and other complex scenarios, with wide application coverage and high environmental tolerance.
