50/60hz 11kv To 400v 500kva 630 kva 3 phase oil type transformer
50/60hz 11kv To 400v 500kva 630 kva 3 phase oil type transformer
1. Product Description
The 50/60hz 11kv to 400v 500kva 630 kva 3 phase oil type transformer is a heavy-duty oil-immersed distribution transformer engineered for medium-voltage power grid step-down conversion and industrial & commercial power distribution. Designed with dual-frequency compatibility for both 50Hz and 60Hz power systems, this three-phase oil type transformer efficiently converts 11kV high-voltage grid power to standard 400V low-voltage three-phase electricity, fully matching global mainstream power supply standards. Available in two mainstream capacity ratings of 500kVA and 630kVA, this 11kV oil immersed power transformer adopts classic ONAN (Oil Natural Air Natural) cooling mode and high-precision silicon steel sheet core structure, effectively reducing no-load loss and operational heat generation. Manufactured in strict accordance with IEC 60076 international power equipment standards, the sealed oil tank structure prevents insulating oil leakage and external environmental interference, ensuring stable electrical performance in long-term continuous operation. As a core medium-voltage distribution device, the 3 phase 11kv 400v oil transformer supports both indoor substation installation and outdoor pole-mounted or platform installation, serving as essential power conversion equipment for medium and large-scale power consumption scenarios.
2. Core Purpose
This 500kVA & 630kVA three-phase oil type transformer undertakes core voltage conversion, power distribution and grid stabilization tasks in medium-voltage power systems. Its primary function is to safely step down 11kV high voltage industrial and grid power to 400V usable low voltage, providing compliant power for three-phase electrical machinery, commercial power facilities and grid terminal loads. As a high-efficiency oil immersed distribution transformer, it balances three-phase current and voltage output, suppresses power grid harmonic interference and voltage fluctuation, and improves the overall power supply quality and stability of distribution networks. The dual 50/60Hz frequency adaptability enables the equipment to adapt to power system standards in different regions, solving the problem of mismatched frequency and voltage in cross-regional power projects. In addition, this 11kV to 400V power transformer features strong overload resistance and low operational loss, which reduces power transmission energy consumption, realizes efficient energy utilization, and provides reliable overload protection and circuit isolation for subsequent power equipment to avoid damage caused by sudden current surge and voltage instability.
3. Application Scenarios
3.1 Industrial Manufacturing Parks
The 50/60hz 11kv to 400v 500kva 630 kva 3 phase oil type transformer is widely used in medium and large industrial parks, processing factories, mechanical manufacturing workshops and chemical enterprises. It can stably supply continuous power for production assembly lines, large mechanical equipment, hydraulic systems and industrial lighting systems, adapting to long-term high-load industrial operation conditions. The 630kVA high-capacity model is more suitable for factories with large power consumption and simultaneous multi-equipment operation, while the 500kVA model is the optimal choice for standard industrial production bases with stable load demand.
3.2 Urban and Rural Power Grid Renovation
As key equipment for urban and rural medium-voltage distribution network construction and grid upgrading, this three-phase oil immersed transformer is installed in community substations, rural centralized power supply stations and urban street distribution stations. It converts 11kV municipal grid power to 400V civil low voltage, meeting the centralized power demand of residential communities, rural settlements and supporting living facilities, effectively solving the problems of insufficient power supply capacity and unstable voltage in old grid areas.
3.3 Commercial & Public Infrastructure
This 11kV to 400V oil type power transformer is applicable for power supporting of large shopping malls, comprehensive office buildings, campus parks, hospital clusters and transportation hub facilities. Its stable voltage output ensures the normal operation of central air conditioning systems, intelligent office equipment, medical precision instruments and public lighting systems, avoiding public service paralysis caused by power supply fluctuation or failure.
3.4 New Energy & Engineering Scenarios
It is perfectly matched for power distribution supporting of centralized photovoltaic power stations, small and medium wind power generation projects and energy storage power distribution systems, realizing efficient grid connection and voltage stabilization of new energy power generation. Meanwhile, it is widely used in temporary power supply for large construction sites, mining areas, road and bridge engineering, with excellent environmental adaptability to cope with complex outdoor construction conditions.
4. Product Features
4.1 Dual-Frequency Universal Adaptability
Supporting both 50Hz and 60Hz rated operating frequency, this 3 phase oil type transformer can adapt to power system standards of most countries and regions worldwide, breaking the frequency limitation of traditional single-frequency transformers. Whether used in domestic 50Hz power grids or overseas 60Hz industrial power systems, the equipment can maintain rated working efficiency and stable voltage conversion performance, with strong global project applicability and universality.
4.2 Low Loss & High Energy Efficiency
Adopting high-permeability cold-rolled silicon steel sheets as the core material and optimized Dyn11 winding structure design, the 500kVA and 630kVA 11kV to 400V oil immersed transformer effectively reduces no-load loss, load loss and magnetic leakage loss during operation. Compared with conventional transformers of the same capacity, its comprehensive power consumption is significantly lower, which greatly reduces long-term operational energy costs for users and meets industrial energy-saving and emission-reduction requirements.
4.3 Superior Heat Dissipation & Continuous Operation Stability
Equipped with standard ONAN natural oil circulation and air cooling system, the equipment relies on high-thermal-conductivity insulating oil to realize internal circulating heat dissipation, matching external heat dissipation fins for passive heat exchange. This mature oil cooling structure ensures that the transformer can operate stably for 24 hours continuously under rated load, with low heat generation and no overheating failure. It can adapt to long-term high-load operation in industrial and grid scenarios, with strong operational stability and anti-fluctuation capability.
4.4 Fully Sealed & High Safety Performance
The whole machine adopts a fully sealed welded steel tank structure, which completely isolates internal insulating oil and windings from external air, moisture and dust. It effectively prevents insulating oil aging, moisture ingress and internal component corrosion, avoiding common faults such as short circuit and electric leakage. Equipped with high-strength high-voltage insulating porcelain sleeves and overload protection structures, the 11kV high-voltage part has excellent insulation and breakdown resistance, ensuring safe and reliable operation of medium-voltage power distribution.
4.5 Strong Environmental Adaptability & Long Service Life
The transformer shell adopts anti-corrosion and weather-resistant spraying process, with good rainproof, dustproof, anti-aging and shockproof performance. It can work stably in the ambient temperature range of -20℃ to 45℃, adapting to outdoor open-air, humid, dusty and other harsh working environments. With standardized winding process and high-quality insulating materials, the equipment has low failure rate and long service life, and daily maintenance is simple and low-cost.
4.6 Standardized Design & Flexible Installation
Both 500kVA and 630kVA models adopt industrial standardized size and interface design, compatible with mainstream domestic and foreign substation equipment and grid connection standards. The overall structure is compact and reasonable, supporting multiple installation methods such as indoor floor installation, outdoor platform installation and pole-mounted installation, with flexible and convenient on-site construction and strong scene adaptability.
5. Frequently Asked Questions (FAQ)
5.1 What is the key difference between 500kVA and 630kVA 11kV to 400V oil type transformers for site selection?
The core difference lies in maximum load capacity and applicable power consumption scale. The 500kVA three-phase oil immersed transformer is suitable for standard industrial workshops, conventional community power distribution and medium-sized commercial venues with stable and moderate power load, which can fully meet daily fixed power demand and reserve a small margin. The 630kVA model with larger bearing capacity is more suitable for large industrial parks, multi-building commercial complexes, new energy power distribution stations and scenarios with frequent load surge and future power expansion demand. Users can select the model according to the actual maximum total power load of the site and subsequent capacity expansion plans.
5.2 Can this 50/60Hz dual-frequency oil transformer be used for overseas 60Hz power projects directly?
Yes, this 3 phase oil type transformer is specially designed with dual 50/60Hz frequency compatibility, no need to modify internal structure or replace accessories. It can be directly put into use in 60Hz power systems in Europe, America, Southeast Asia and other regions, maintaining stable voltage conversion accuracy and rated working efficiency. Different from single-frequency transformers that are only applicable to domestic 50Hz grids, this dual-frequency model has wider overseas project applicability and can effectively reduce equipment procurement and transformation costs for cross-regional power engineering projects.
5.3 What are the key daily maintenance points for 11kV to 400V oil immersed distribution transformers?
Daily maintenance of this oil type power transformer is simple and efficient with low cost. First, regularly check the oil level and clarity of internal insulating oil, ensure the oil level is within the standard scale, and replace deteriorated insulating oil every 3-5 years to guarantee heat dissipation and insulation performance. Second, clean the dust and floating debris on the surface of heat dissipation fins regularly to avoid blocking heat dissipation channels and causing high temperature operation. Third, inspect the tightness of high and low voltage wiring terminals and the sealing integrity of the oil tank quarterly to prevent oil leakage and moisture ingress. Regular no-load and load operation tests can effectively eliminate potential faults and prolong the service life of the equipment.
