1000KVA 1250KVA Three Phase Electric Oil Power Distribution Transformers
1000KVA 1250KVA Three Phase Electric Oil Power Distribution Transformers | 10KV Input, 6KV/35KV Step-Up & 220V/380V Output
1. Product Description
This professional series features 1000KVA and 1250KVA three phase electric oil power distribution transformers, specially engineered for versatile medium-voltage power conversion in industrial and utility grid systems. Designed with standard 10KV input voltage, this heavy-duty oil immersed power transformer supports flexible dual conversion modes, including step-up output of 6KV and 35KV medium-high voltage, as well as conventional step-down output of 220V single-phase and 380V three-phase low voltage. It is a multi-functional oil filled distribution transformer that integrates step-up power transmission and step-down terminal power distribution, filling the market gap of dual-purpose medium-capacity power transformation equipment for 10KV grade power grids.
Manufactured in strict accordance with IEC 60076 international electrical standards and national power distribution equipment specifications, this three phase oil immersed transformer adopts high-quality low-loss silicon steel sheet core and high-purity copper winding structure. Optimized magnetic circuit layout and precision winding technology effectively reduce no-load loss, load loss and operating vibration compared with traditional old-fashioned distribution transformers. Adopting mature ONAN oil-natural air-natural cooling system and fully sealed integral oil tank design, the equipment maintains stable insulation performance and efficient heat dissipation during long-term continuous full-load and fluctuating load operation. Both 1000KVA and 1250KVA capacity models adopt standardized industrial configuration, supporting 50Hz and 60Hz global grid frequency operation, with strong compatibility for domestic power grid renovation and overseas industrial power projects.
Different from single-function transformers on the market, this 10KV input oil power distribution transformer realizes flexible switching of voltage rise and fall. It can boost conventional 10KV grid voltage to 6KV and 35KV for regional power grid grading transmission and special industrial equipment power supply, while converting 10KV medium voltage to standard 220V and 380V low voltage for civil and industrial terminal power consumption. The two mainstream medium capacities of 1000KVA and 1250KVA cover most medium-load power distribution scenarios, with compact structure, stable voltage output and strong overload resistance, making it a cost-effective core device for modern urban and rural power distribution, industrial park power supply and distributed energy projects.
2. Core Product Purposes
The core purpose of 1000KVA and 1250KVA three phase oil power distribution transformers is to realize safe, efficient and multi-directional voltage conversion, power transmission and terminal power distribution in 10KV medium-voltage power systems, solving the dual demands of regional medium-voltage grid grading transmission and low-voltage terminal stable power supply.
In actual power system operation, this 10KV input oil immersed transformer undertakes two core power transformation tasks. On one hand, it serves as a professional step-up transformer, stably boosting 10KV input voltage to 6KV and 35KV medium-high voltage, which is applied for long-distance regional power transmission, special industrial medium-voltage equipment power supply and hierarchical grid voltage optimization, effectively improving the transmission capacity and coverage of 10KV basic power grids. On the other hand, it acts as a conventional step-down distribution transformer, converting 10KV medium voltage into compliant 220V household power and 380V industrial three-phase power, meeting the comprehensive power consumption needs of residential life, commercial facilities and factory production equipment.
In addition to basic voltage conversion, this low-loss oil immersed distribution transformer optimizes the overall operation quality of power grids. It can effectively suppress grid harmonic interference, stabilize terminal voltage fluctuation caused by load changes, and reduce electric energy loss during power transmission and conversion. With excellent short-circuit impact resistance and overload tolerance, it can buffer instantaneous current surges caused by equipment startup and grid peak load switching, isolate circuit fault risks, and protect subsequent power distribution cabinets, electrical machinery and intelligent power consumption equipment. The 1000KVA and 1250KVA capacity gradient design enables refined matching for different medium-load scenarios, effectively improving the stability and energy utilization rate of regional power distribution systems.
3. Typical Application Scenarios
3.1 Urban & Rural 10KV Power Grid Distribution Projects
This three phase oil power distribution transformer is widely used in new construction and upgrading projects of urban and rural 10KV medium-voltage power grids. The 1000KVA model is suitable for township-level power distribution stations and suburban community centralized power supply, while the 1250KVA high-load model is applied for urban community clusters and urban fringe grid hub distribution points. It can not only step down 10KV grid power to 220V/380V low voltage to meet residents' living and public facility power needs, but also boost partial power to 6KV for regional secondary grid distribution, effectively solving the problem of insufficient power supply coverage in suburban and rural scattered power supply areas.
3.2 Medium-Sized Industrial Park & Factory Power Supply
It is the preferred power transformation equipment for medium-sized manufacturing parks, light industrial factories, agricultural product processing bases and mechanical processing workshops. Most industrial parks take 10KV as the main grid access voltage, and on-site power demand is diversified: production lines and mechanical equipment require stable 380V industrial power, office and living areas need 220V civil power, and some special industrial medium-voltage equipment needs 6KV or 35KV power support. This dual-purpose oil immersed transformer can realize one-stop voltage conversion, fully meeting the mixed power supply demands of industrial production, office and special equipment, and adapting to 24-hour continuous high-load operation of industrial parks.
3.3 Regional Power Grid Grading Transmission & Voltage Compensation
For regional power grid networking and long-distance power transmission projects, this 10KV input step-up transformer plays a key role in voltage boosting and power compensation. It can boost conventional 10KV grid voltage to 35KV high medium voltage for cross-region long-distance power transmission, reducing line transmission loss and improving power transmission efficiency. For areas with insufficient terminal voltage caused by long-distance line loss, the 6KV step-up output can realize local voltage compensation, effectively solving the problems of low terminal voltage and unstable power consumption in remote power supply areas, and optimizing the overall operating efficiency of regional power grids.
3.4 New Energy & Temporary Engineering Power Supply
The transformer series is also applicable to distributed photovoltaic power stations, small wind power plants and field engineering temporary power supply projects. New energy power generation systems are mostly connected to 10KV power grids, and this equipment can convert fluctuating new energy power into stable 6KV/35KV grid-connected voltage and 220V/380V self-use voltage, realizing grid-connected power transmission and on-site self-consumption integration. Its fully sealed outdoor structure adapts to harsh environments such as field dust, humidity and temperature changes, providing reliable power guarantee for infrastructure construction and field operation projects.
4. Core Product Features
4.1 Dual Step-Up & Step-Down Multi-Voltage Conversion
Different from traditional single-function distribution transformers, this 10KV input three phase oil immersed transformer supports multi-directional voltage conversion. It can step up voltage to 6KV and 35KV medium-high grade for power grid transmission and special industrial use, and step down voltage to standard 220V and 380V low voltage for terminal power distribution. The multi-voltage output design breaks the limitation of single voltage ratio of conventional transformers, realizes one equipment with multiple uses, greatly reduces project equipment configuration costs, and improves the flexibility of power system design.
4.2 Dual-Capacity Flexible Load Matching
Covering two mainstream medium industrial capacities of 1000KVA and 1250KVA, the transformer series can accurately match different medium-load power demand scenarios. The 1000KVA model features moderate load capacity and high cost performance, suitable for conventional medium-load power distribution and general industrial projects. The 1250KVA model has stronger overload resistance and continuous operation capacity, meeting the high-load and peak power consumption demands of urban hub distribution stations and medium-sized industrial parks. Users can select models according to actual load and future expansion needs, realizing refined power supply matching.
4.3 Low Energy Loss & High Operation Efficiency
Adopting high-grade low-loss silicon steel core and high-purity copper winding process, this oil power distribution transformer effectively reduces no-load loss and load loss during long-term operation. The optimized internal magnetic circuit structure avoids magnetic flux leakage, and the overall power conversion efficiency is significantly higher than traditional old-fashioned transformers. Whether in step-up power transmission or step-down power distribution mode, it can maintain high-efficiency and stable operation, effectively reducing long-term power consumption and operation costs for power grid enterprises and industrial users, with outstanding energy-saving and environmental protection benefits.
4.4 Fully Sealed Structure & Strong Environmental Adaptability
Equipped with fully sealed welded oil tank and standard ONAN natural cooling system, the whole machine has excellent waterproof, dustproof and anti-corrosion performance. The external weather-resistant coating can resist ultraviolet radiation, rain erosion, high temperature aging and low temperature freezing, adapting to outdoor open-air substations, dusty industrial sites and humid field environments. The sealed structure prevents insulating oil moisture and oxidation, maintains stable insulation and heat dissipation performance for a long time, and supports long-term unattended outdoor operation with low environmental sensitivity.
4.5 Excellent Safety & Fault Resistance Performance
The internal winding adopts integral fastening and multi-layer composite insulation structure, with strong mechanical stability and short-circuit impact resistance. It can effectively resist instantaneous short-circuit current and grid voltage surge caused by load switching and power generation fluctuation, avoiding coil deformation and equipment burnout. Equipped with standard pressure relief valve, oil level monitoring device and temperature sensing protection system, it can automatically release internal overpressure and monitor operating status in real time, preventing equipment overheating and overpressure faults. The low partial discharge design ensures safe and reliable long-term operation in 10KV medium-voltage power systems.
4.6 Wide Frequency Compatibility & Low Maintenance Cost
This three phase oil immersed power transformer supports stable operation of 50Hz and 60Hz dual-frequency power grids, adapting to global mainstream power frequency standards and suitable for domestic and overseas engineering projects. The equipment has a mature and reliable internal structure without complex vulnerable parts, with low daily failure rate. The fully sealed design avoids frequent oil replacement and internal cleaning, and daily maintenance only needs regular oil level inspection, oil quality detection and sealing check. It has long service life and low later operation and maintenance investment, with high comprehensive cost performance in medium-capacity power transformation projects.
5. Frequently Asked Questions (FAQ)
Q1: How to choose between 1000KVA and 1250KVA 10KV input oil immersed transformers?
The selection depends on actual on-site load size and future power expansion plan. The 1000KVA three phase oil power distribution transformer is ideal for conventional township power distribution stations, small and medium-sized light industrial factories and ordinary community power supply projects with stable and moderate load. It balances cost and performance, with high cost performance for conventional medium-load scenarios. The 1250KVA model has larger rated load capacity and stronger peak load resistance, more suitable for urban hub distribution stations, medium-sized industrial parks and projects with obvious power consumption peaks and future load growth demand. It is recommended to reserve 10%–20% capacity margin during selection to avoid overload operation in peak periods.
Q2: What are the practical application differences between 6KV and 35KV step-up output of this transformer?
Both voltage outputs are derived from 10KV input conversion, with consistent equipment safety and operation performance, differing only in applicable scenarios. The 6KV step-up output is mainly used for regional secondary power grid distribution, medium and small industrial special medium-voltage equipment power supply and local grid voltage compensation, suitable for short-distance power transmission and on-site industrial supporting power supply. The 35KV step-up output is targeted at long-distance regional power transmission, cross-area grid networking and large industrial high-medium voltage power supply scenarios, which can effectively reduce line transmission loss and improve power grid transmission efficiency. Users can match the output voltage according to on-site grid planning and equipment voltage standards.
Q3: What key points should be noted in daily operation and maintenance of outdoor multi-voltage oil immersed transformers?
Daily maintenance focuses on three core links to ensure long-term stable and safe operation. First, regularly inspect the oil tank sealing performance, welding seams and heat dissipation components to eliminate insulating oil leakage hidden dangers, and check the oil level and clarity, replacing deteriorated insulating oil in time to guarantee insulation and heat dissipation efficiency. Second, clean the radiator dust and sundries regularly to keep the natural cooling system unobstructed, preventing equipment overheating during high-load step-up and step-down switching operation. Third, periodically test the winding insulation resistance and verify the stability of 6KV/35KV step-up voltage and 220V/380V output voltage, check the integrity of overvoltage and overheating protection devices, and eliminate abnormal noise and temperature rise faults to ensure fault-free operation all year round.
