10kv 20kv 630kva Oil Immersed High Voltage Transform
1. Product Overview
The 10kV 20kV 630kVA oil immersed high voltage transformer is a high-performance three-phase medium voltage power distribution transformer widely used in industrial and municipal power grid systems. Designed and manufactured in compliance with IEC 60076 and national power industry standards, this 630kVA oil immersed distribution transformer supports dual high voltage input grades of 10kV and 20kV, covering mainstream medium voltage power supply specifications for urban and rural power grids, industrial parks, and commercial power distribution stations. Adopting traditional and mature oil-filled cooling and insulating technology, the high voltage oil immersed transformer features stable electromagnetic performance, low operational loss, and strong environmental adaptability, serving as core power conversion equipment for medium-to-large load power transmission and voltage transformation projects.
This 10kV/20kV dual-voltage 630kVA oil immersed transformer adopts high-quality oriented silicon steel sheets and precision wound copper windings, effectively optimizing internal electromagnetic structure and reducing no-load and load loss. The fully sealed oil tank structure prevents insulating oil leakage, moisture penetration, and dust contamination, enabling long-term continuous and stable operation in outdoor open-air environments and indoor distribution rooms. Available with non-excitation voltage regulation and on-load voltage regulation options, the medium voltage oil immersed power transformer can adapt to complex grid voltage fluctuation conditions, meeting customized power distribution demands for different engineering scenarios.
2. Core Product Features
2.1 Dual Voltage Compatibility & Wide Applicability
Featuring dual rated high voltage grades of 10kV and 20kV, this 630kVA high voltage oil immersed transformer supports flexible switching and matching of medium voltage grid access, compatible with both traditional 10kV urban power grids and upgraded 20kV new power distribution systems. It effectively solves the problem of equipment replacement and adaptation during grid upgrading and reconstruction, greatly improving the versatility and reuse rate of power distribution equipment. The standard 630kVA rated capacity perfectly matches the conventional load demand of industrial and civil medium voltage power distribution, achieving precise matching of power supply capacity and terminal load.
2.2 Low Loss & High Energy Efficiency
Equipped with high-permeability low-loss silicon steel core and high-purity copper winding, the 10kV 20kV oil immersed high voltage transformer effectively reduces magnetic flux leakage and no-load loss. Optimized winding layout and electromagnetic design significantly lower operating power consumption, with overall energy efficiency reaching the national first-class energy-saving standard. Compared with traditional old-fashioned transformers, this energy-saving oil immersed distribution transformer greatly reduces long-term grid operation energy consumption and operating costs, complying with global energy conservation, emission reduction, and green power grid construction requirements.
2.3 Excellent Heat Dissipation & Stable Continuous Operation
Adopting natural oil circulation heat dissipation technology, the 630kVA 10kV/20kV oil-filled transformer utilizes high-purity filtered transformer insulating oil as cooling and insulating medium. The internal circulating oil system efficiently takes away heat generated by core and winding operation, ensuring uniform internal temperature and avoiding local overheating. It supports 24/7 long-term full-load and occasional short-term overload operation, with stable voltage output and no performance attenuation under continuous working conditions, effectively guaranteeing the reliability of medium voltage power distribution systems.
2.4 Fully Sealed & Ultra-Long Service Life
The whole machine adopts a fully sealed welded steel plate oil tank and high-performance aging-resistant rubber sealing gaskets, which completely isolate internal components from external humid air, rainwater, dust, and corrosive gases. This structural design effectively prevents insulating oil aging, winding moisture, and core rusting. The surface of the transformer undergoes multi-layer anti-corrosion and electrostatic spraying treatment, with strong ultraviolet resistance and weather resistance. The service life of the outdoor oil immersed high voltage transformer can reach more than 25 years, with extremely low daily failure rate and maintenance frequency.
2.5 Strong Safety & Impact Resistance
This medium voltage oil immersed power transformer is equipped with perfect overcurrent, short-circuit, and overvoltage protection performance. The internal insulating oil has excellent arc extinguishing capability, which can quickly eliminate electric arcs generated by sudden circuit faults and avoid equipment burnout and grid accidents. The rigid fixed structure of internal windings and iron core can resist strong electromagnetic impact generated by short-circuit current, ensuring structural stability and electrical safety of the equipment during fault operation. It has passed strict partial discharge, withstand voltage, and short-circuit impact tests, with high operational safety and stability.
3. Core Purpose
As key medium-voltage conversion equipment in power distribution systems, the 10kV 20kV 630kVA oil immersed high voltage transformer is mainly used to convert 10kV or 20kV medium voltage grid electric energy into 0.4kV low-voltage commercial and industrial power supply, realizing step-down transmission and stable distribution of medium voltage electric energy. It undertakes the core functions of grid voltage matching, electric energy isolation, load power regulation, and power quality optimization in regional power supply systems.
The high voltage oil immersed distribution transformer can effectively isolate grid voltage harmonics and voltage fluctuations, stabilize terminal output voltage, and protect subsequent low-voltage electrical equipment and power utilization systems from grid impact. For industrial production, municipal engineering, and residential concentrated power supply scenarios, it balances grid transmission voltage and terminal load demand, improves the stability and continuity of regional power supply, and is an indispensable core equipment for medium and low voltage power grid connection and power distribution operation.
4. Main Application Scenarios
4.1 Urban & Rural Power Grid Renovation & Construction
The 10kV 20kV 630kVA oil immersed high voltage transformer is widely used in new construction and upgrading and reconstruction of urban and rural medium voltage power grids. It adapts to the dual voltage system of 10kV and 20kV regional power grids, effectively solving the power supply capacity upgrade problem in urban suburban expansion and rural power grid renovation projects. Its outdoor installation adaptability and stable operation performance make it the mainstream matching equipment for municipal power grid terminal distribution stations.
4.2 Industrial Park & Factory Power Distribution
Suitable for medium-load power supply of industrial parks, manufacturing factories, processing plants, and mining enterprises, the 630kVA medium voltage oil immersed transformer provides stable low-voltage power support for production equipment, workshop power distribution systems, mechanical equipment, and auxiliary electrical facilities. It can cope with intermittent load fluctuations in industrial production, ensure continuous and stable power supply for production lines, and reduce production power failure risks caused by unstable voltage.
4.3 Commercial Complex & Public Facilities Power Supply
This 10kV/20kV dual-voltage oil-filled transformer is applicable to power distribution projects of shopping malls, office buildings, community service centers, schools, hospitals, and other public and commercial buildings. The 630kVA rated capacity fully meets the comprehensive power consumption demand of building lighting, central air conditioning, elevator equipment, office electrical appliances, and fire-fighting power systems, ensuring safe and reliable power supply for public service facilities.
4.4 New Energy Power Matching Projects
It can be used for voltage conversion and grid-connected power distribution of distributed photovoltaic power stations, small wind power stations, and energy storage power stations. The high stability and anti-fluctuation performance of the oil immersed high voltage transformer can adapt to the unstable power output characteristics of new energy power generation, stabilize grid-connected voltage, optimize new energy power transmission quality, and improve the efficiency and safety of new energy grid-connected power distribution.
4.5 Infrastructure & Engineering Supporting Power Supply
Widely used in supporting power distribution of highway engineering, railway transit, municipal road facilities, water supply and drainage projects, and environmental protection treatment projects. The outdoor weather-resistant 630kVA oil immersed transformer can adapt to complex construction and operation environments, provide long-term stable medium and low voltage power supply for engineering operation equipment and monitoring systems, and meet the power demand of large-scale infrastructure projects.
5. FAQ (Frequently Asked Questions)
5.1 What is the difference between 10kV and 20kV working modes of the 630kVA oil immersed high voltage transformer?
The core difference lies in the access grid voltage and application grid standards, while the rated 630kVA capacity and output performance remain consistent. When working in 10kV mode, the transformer is suitable for traditional domestic and most Southeast Asian medium voltage power grids, matching conventional urban and rural 10kV power distribution systems. When switched to 20kV working mode, it adapts to upgraded 20kV high-efficiency power grid systems commonly used in Europe, Australia and new urban grid reconstruction projects, featuring longer power transmission distance and lower line loss. The equipment can realize voltage grade switching through internal tapping adjustment without replacing the whole machine, with strong engineering flexibility.
5.2 Is the 630kVA 10kV/20kV oil immersed transformer suitable for outdoor rainy and high-temperature environments?
Yes, this high voltage oil immersed distribution transformer is specially optimized for outdoor harsh working conditions. It adopts a fully sealed anti-leakage structure and multi-layer anti-corrosion spray shell, with excellent rainproof, waterproof, dustproof and ultraviolet aging resistance. The high-quality insulating oil maintains stable cooling and insulation performance in the temperature range of -40℃ to +45℃, avoiding oil viscosity failure or insulation performance decline caused by extreme high and low temperatures. It can operate stably for a long time in outdoor open-air, rainy, high-temperature and windy environments, and is more adaptable to outdoor scenarios than dry-type transformers.
5.3 What are the daily maintenance requirements for the 10kV 20kV 630kVA oil-filled high voltage transformer?
This series of oil immersed transformers adopts low-maintenance design with simple daily maintenance procedures. First, regularly inspect the transformer shell for oil leakage, deformation and rust, and check the tightness of high and low voltage wiring terminals to prevent poor contact. Second, test the quality of internal insulating oil every 1–2 years to ensure its cooling and insulation performance meets standards. Third, clean surface dust and debris regularly to maintain good heat dissipation conditions. Finally, regularly check the pressure relief device and temperature indicator to ensure normal operation. With standardized maintenance, the equipment can maintain stable performance for more than 25 years with low failure rate.
