63000 KVA 3 Phase Oil Type Transformer 110kV to 10.5kV
1. Product Description
The 63000 KVA 3 Phase Oil Type Transformer 110kV to 10.5kV is a large-capacity industrial-grade oil-immersed power transformer designed for high-load power grid operation and heavy industrial power supply scenarios. As a mainstream 63MVA three-phase step-down transformer widely adopted in modern power systems, this high-voltage power conversion equipment strictly complies with IEC international standards and GB national electrical specifications, supporting stable AC power conversion for 50Hz three-phase power networks.
This 110kV class oil immersed transformer features a standard primary voltage of 110kV and a secondary output voltage of 10.5kV, serving as the core voltage transformation unit between high-voltage transmission grids and medium-voltage distribution systems. Different from small and medium-capacity power transformers, the 63000KVA high-power oil type transformer is engineered for long-duration full-load and overload operation, solving the large-scale power stepping-down demand of regional main substations, heavy industrial bases and new energy centralized power stations.
Manufactured with high-purity copper windings and high-performance cold-rolled grain-oriented silicon steel core, the equipment adopts a fully sealed oil-filled structure and vacuum oil injection process. It effectively suppresses partial discharge, reduces operating loss, and delivers stable electrical performance in complex outdoor and industrial environments. All units undergo strict short-circuit withstand testing, temperature rise testing and airtightness inspection before delivery, ensuring reliable and safe operation in long-term grid-connected scenarios. It is one of the most widely used large-capacity 110kV power transformers in urban grid expansion and industrial power upgrading projects.
2. Core Product Features
2.1 Large-Capacity Stable Power Conversion
Rated at 63000KVA, this 3 phase oil type transformer supports continuous and stable power transmission and voltage conversion for large power loads. The optimized winding layout and electromagnetic structure design balance internal electric field distribution thoroughly, ensuring accurate and consistent 110kV to 10.5kV voltage output without voltage drift under fluctuating load conditions. It perfectly matches the high-power electricity demand of regional power grids and heavy industrial enterprises, solving the power supply bottleneck of small-capacity transformers in high-load scenarios.
2.2 Low Loss and Energy-Saving Performance
Equipped with low-loss CRGO silicon steel sheets and optimized core lamination technology, the transformer effectively cuts down no-load loss, load loss and reactive power loss. Compared with traditional old-generation 110kV transformers, this energy-saving oil immersed power transformer reduces comprehensive operating losses significantly, lowering long-term grid operation energy consumption and enterprise electricity costs. It fully meets national industrial energy-saving and emission-reduction requirements, making it ideal for large-scale long-term operating power facilities.
2.3 Superior Oil Immersed Heat Dissipation and Insulation
Adopting mature oil-immersed self-cooling technology, the internal high-quality transformer insulating oil forms a circulating heat dissipation system, quickly taking away heat generated by the core and windings during high-load operation. The fully sealed oil tank structure isolates insulating oil from external air, preventing oil oxidation, moisture ingress and insulation aging. With extremely low partial discharge value below industry standard limits, the equipment maintains excellent insulation performance under high temperature, high humidity and harsh outdoor climatic conditions.
2.4 Strong Short-Circuit Resistance and Mechanical Stability
The overall structure adopts reinforced clamping and fixed design, with windings fixed by high-strength insulating brackets to resist electromagnetic impact and mechanical deformation caused by sudden short-circuit faults in the power grid. This 63MVA high voltage step-down transformer passes rigorous short-circuit withstand tests, ensuring no structural damage or electrical failure during grid surge and short-circuit accidents. Its robust mechanical structure guarantees stable operation in complex power grid environments with frequent load fluctuations.
2.5 Fully Sealed Leak-Proof and Low Maintenance Design
The integrated welded steel tank and one-piece molded high-performance sealing accessories eliminate oil leakage risks fundamentally. All products undergo strict positive and negative pressure airtight testing and fluorescent leak detection before leaving the factory. The no-core-lifting structural design avoids frequent disassembly and maintenance, greatly reducing daily operation and maintenance workload and after-sales service costs. Meanwhile, the optimized structural layout lowers operating noise effectively, meeting urban and industrial environmental noise control standards.
2.6 Wide Environmental Adaptability
Designed for all-weather outdoor operation, the transformer can work stably in the ambient temperature range of -30℃ to +50℃, and adapt to harsh environments such as strong wind, heavy rain, snow and high altitude. The anti-corrosion spray treatment on the outer tank prevents rust and corrosion, extending the overall service life of the equipment and ensuring long-term reliable operation in outdoor substations and open industrial sites.
3. Core Usage
The primary core function of the 63000 KVA 3 Phase Oil Type Transformer 110kV to 10.5kV is high-capacity step-down power transformation in medium and high voltage power systems. It efficiently converts 110kV high-voltage power from regional transmission grids into 10.5kV medium-voltage power suitable for industrial production and urban power distribution, acting as the key power conversion hub in large-scale power supply systems.
In regional power grid operation, this large oil immersed power transformer undertakes centralized power distribution and voltage stabilization tasks. It effectively balances grid voltage fluctuations, optimizes power transmission quality, and improves the stability and continuity of regional power supply. For heavy industrial scenarios, it provides stable high-power power support for large-scale production equipment, avoiding production shutdowns and equipment damage caused by insufficient power capacity and unstable voltage.
Additionally, the equipment supports grid-connected power regulation for new energy power generation projects, solving the problem of mismatched voltage and unstable power output of wind power and photovoltaic power stations. It plays a vital role in improving new energy grid-connected efficiency, reducing line transmission loss, and realizing safe and standardized power transmission and distribution.
4. Application Scenarios
4.1 Regional Main Power Grid Substations
This 63000KVA 110kV to 10.5kV oil type transformer is the core equipment for 110kV primary substations in urban new districts, county-level regional power grids and suburban power grid reconstruction projects. It is responsible for centralized voltage reduction and power distribution of regional high-voltage power grids, providing stable power supply for urban residential power consumption, commercial supporting facilities and municipal engineering equipment, and guaranteeing the safe operation of urban basic power grids.
4.2 Heavy Industrial and Mining Enterprises
It is widely applied in large metallurgical plants, chemical industrial parks, coal mining bases, building materials factories and other heavy-load industrial scenarios. These enterprises have large, long-term and stable power consumption demands, and the 63MVA large-capacity transformer can fully meet the continuous power supply requirements of high-power industrial equipment, solving the problem of insufficient power capacity of traditional small and medium-sized transformers in heavy industrial production.
4.3 Large-Scale New Energy Power Stations
Suitable for grid-connected supporting projects of large terrestrial photovoltaic power stations, centralized wind power plants and energy storage power stations. As a key step-down device for new energy grid connection, it converts high-voltage power generated by new energy equipment into standard 10.5kV distribution voltage, realizes efficient integration of new energy power into public power grids, and improves the utilization rate and grid-connected stability of clean energy power.
4.4 Large Infrastructure and Key National Projects
It provides supporting power transformation services for large-scale key projects including high-speed railway hub power supply, airport power distribution systems, large industrial parks and logistics base clusters. These projects require high stability and high capacity power supply, and this high-performance oil immersed transformer can adapt to long-term full-load operation, ensuring the continuous and stable operation of major infrastructure and key engineering equipment.
5. Frequently Asked Questions (FAQ)
Q1: What makes the 63000KVA 110kV to 10.5kV oil type transformer different from medium and small-capacity transformers?
This 63MVA large-capacity oil immersed transformer is specially customized for high-load and large-scale power supply scenarios, with far higher rated power, overload resistance and short-circuit withstand capacity than conventional medium and small transformers. It adopts an enhanced mechanical structure and upgraded heat dissipation system, supporting 24-hour long-term full-load continuous operation, while small-capacity transformers are only suitable for light and intermittent load scenarios. In terms of application scope, it targets regional main substations and heavy industrial projects, and features lower unit power loss and longer service life in large-scale grid operation, with more stable overall performance and higher operational safety.
Q2: What are the key daily maintenance points for this 110kV class large oil immersed transformer?
This fully sealed 3 phase oil type transformer features low daily maintenance costs and simple operation. Daily routine inspection mainly includes checking the oil tank for oil leakage, observing whether the oil level and oil temperature are within the standard range, monitoring operating noise and vibration status, and cleaning external dust and debris regularly. Professional testing is required every 2 to 3 years, including insulating oil quality analysis, partial discharge detection and winding insulation resistance testing. The equipment adopts a no-core-lifting design, eliminating the need for frequent disassembly and overhaul, which greatly reduces later operational and maintenance pressure for power stations and enterprises.
Q3: What kind of load and working environment is this 63000KVA transformer suitable for?
This high-capacity step-down transformer is mainly applicable to outdoor substation environments and open industrial sites with large power load and continuous power consumption. It adapts to harsh working conditions such as wide temperature difference, high humidity and high dust, with an operating ambient temperature range of -30℃ to +50℃. It is suitable for long-term full-load and intermittent overload operation, and is not applicable to indoor closed environments with strict fire prevention requirements (dry-type transformers are recommended for such scenarios). It is the preferred power transformation equipment for large power grids, heavy industry and new energy projects with high power supply stability and capacity requirements.
