1000kVA 1000kW Three Phase Oil Immersed MV&HV Distribution Power Transforme
1000kVA 1000kW Three Phase Oil Immersed MV&HV Distribution Power Transformer | 11kV 22kV 30kV 33kV Input, 380V 440V Output
1. Product Description
The 1000kVA (1000kW) three phase oil immersed MV&HV distribution power transformer is a medium-capacity, grid-grade power conversion device widely used in medium and high voltage power distribution systems. Designed and manufactured in compliance with IEC 60076 and international power industry standards, this heavy-duty oil filled power transformer supports multiple mainstream high input voltage options including 11kV, 22kV, 30kV and 33kV, while delivering stable three-phase low voltage output at 380V and 440V, perfectly matching industrial and municipal three-phase power consumption standards worldwide.
Built with premium cold-rolled oriented silicon steel core and full copper three-phase windings, this 1000kVA HV distribution transformer adopts a fully sealed oil immersed cooling and insulation structure. All core and coil components are completely submerged in high-purity transformer insulating oil, which serves as both insulation medium and heat dissipation medium. The standard ONAN natural cooling system ensures consistent thermal stability during long-term full-load and partial overload operation, effectively solving overheating and insulation aging issues common in continuous industrial power supply scenarios. Different from low-capacity distribution transformers, this 1000kW three-phase transformer is optimized for heavy-load, long-duration operation in commercial parks, industrial zones and regional power distribution stations.
As a versatile MV to LV step-down transformer, it bridges the gap between 11kV–33kV medium and high voltage transmission lines and 380V/440V low-voltage terminal equipment. With standardized voltage ratio configuration, robust mechanical structure and ultra-low operating loss, this oil immersed power transformer delivers reliable power conversion performance for both urban power grid upgrading and industrial power distribution projects. It supports stable operation under 50Hz and 60Hz universal grid frequencies, adapting to diverse power grid specifications across different regions and meeting large-scale continuous power supply demands.
2. Core Product Features
2.1 Multi-Grade HV Input and Flexible LV Output Compatibility
This 1000kVA three phase oil immersed transformer features wide voltage adaptability, covering four mainstream medium and high voltage input grades: 11kV, 22kV, 30kV and 33kV, which fully fits most regional MV&HV overhead line and substation power grid standards. For low-voltage terminal output, it supports adjustable 380V and 440V three-phase output modes, covering conventional industrial equipment, mechanical production lines and municipal power distribution requirements. The flexible voltage matching design eliminates the limitation of single voltage specification, enabling one device to adapt to multiple power grid environments and terminal load demands, greatly improving equipment applicability and project universality.
2.2 Low Loss, High Efficiency and Energy-Saving Operation
Optimized core lamination technology and precise three-phase winding layout effectively suppress magnetic flux leakage, eddy current loss and no-load loss. Compared with traditional old-fashioned 1000kVA distribution transformers, this upgraded oil immersed model greatly reduces long-term operating power consumption. Whether operating under full industrial load or long-term light-load grid standby state, the equipment maintains high power conversion efficiency, effectively lowering daily operational costs for power stations, industrial parks and power grid enterprises. Its excellent energy-saving performance makes it a preferred choice for new-era energy-efficient power distribution grid construction.
2.3 Superior Insulation and Overload Resistance
Adopting global vacuum oil injection and fully sealed oil tank technology, the internal insulation system is completely isolated from external air and moisture, avoiding insulating oil deterioration and insulation performance degradation. The composite multi-layer insulation structure enables the transformer to withstand instantaneous overvoltage impact and short-circuit surge of 11kV to 33kV high-voltage lines, with extremely low partial discharge value and high operational safety margin. Designed for industrial heavy-load working conditions, it has strong overload capacity and can withstand short-term peak load impact without overheating or failure, ensuring continuous and stable power supply for high-demand industrial scenarios.
2.4 Durable Outdoor Industrial Grade Structure
The whole machine adopts integrated welded corrugated oil tank and heavy-duty anti-corrosion electrostatic spraying process, which resists wind erosion, rain soaking, ultraviolet aging and industrial corrosive gas. It can operate stably for a long time in harsh outdoor environments such as industrial zones, field substations and coastal humid areas. The firm mechanical structure has good seismic performance and wind load resistance, avoiding structural deformation and oil leakage caused by external environmental factors. The fully sealed design also prevents dust and impurities from entering the interior, ensuring long-term stable electrical performance of the equipment.
2.5 Low Maintenance and Long Service Life
This 1000kW three-phase MV&HV transformer realizes long-term maintenance-free operation under conventional working conditions due to its fully sealed oil immersed structure, eliminating frequent oil replenishment and internal cleaning work. High-quality copper windings and high-performance silicon steel core have strong aging resistance and structural stability, not easy to damage after years of continuous operation. With regular routine inspection and simple maintenance, the service life of the equipment can reach more than 30 years, greatly reducing later equipment replacement and operation and maintenance costs for users.
3. Core Purpose
The core purpose of the 1000kVA three phase oil immersed MV&HV distribution power transformer is to complete efficient and safe medium-to-high voltage step-down conversion and three-phase power distribution in industrial and municipal power grid systems. It mainly converts 11kV, 22kV, 30kV and 33kV high-voltage grid electric energy into standard 380V and 440V three-phase low-voltage industrial power, realizing stable power transmission from high-voltage trunk lines to industrial equipment and municipal terminal power distribution systems.
In actual power system operation, this oil immersed power transformer undertakes key tasks of voltage stabilization, load distribution and grid fault isolation. It effectively solves the problems of voltage attenuation and power fluctuation in long-distance high-voltage power transmission, stabilizes three-phase output voltage balance, and ensures the stable operation of large mechanical equipment, production lines and electrical systems. For regional power grid construction and renovation projects, it balances regional power load pressure, improves power grid power supply capacity, and avoids local grid overload and power supply instability during peak power consumption periods.
In addition, this MV&HV distribution transformer reduces power transmission loss in the voltage conversion process, improves overall power grid operation efficiency, and isolates high-voltage line faults to prevent fault diffusion affecting low-voltage terminal power consumption safety. It serves as the core intermediate power conversion equipment connecting medium and high voltage power grids and low-voltage industrial power terminals.
4. Application Scenarios
4.1 Industrial Park and Factory Power Distribution
This 1000kVA 1000kW three phase oil immersed transformer is widely used in large manufacturing factories, chemical industrial parks, machinery processing bases and industrial cluster zones. Industrial production requires long-term heavy-load three-phase power supply, and the 380V and 440V stable output perfectly matches the operating voltage of industrial motors, production lines, welding equipment and mechanical supporting systems. The strong overload resistance and stable heat dissipation performance adapt to frequent load switching and long-term full-load operation of industrial equipment, ensuring uninterrupted industrial production power supply.
4.2 Municipal Power Grid and Substation Projects
It is the key supporting equipment for urban regional substations, community power distribution stations and urban power grid upgrading and reconstruction projects. Supporting 11kV, 22kV, 30kV and 33kV multi-grade high-voltage grid access, it can flexibly adapt to different urban power grid voltage standards. The stable three-phase low-voltage output meets the centralized power consumption demand of urban commercial buildings, office parks and municipal public facilities, effectively improving urban power grid supply reliability and load capacity.
4.3 New Energy Power Station Grid Connection
The equipment is widely applied to centralized photovoltaic power stations, wind power plants and energy storage power distribution systems. New energy power generation has intermittent and fluctuating characteristics, and this high-stability oil immersed distribution transformer can stabilize new energy output voltage, complete efficient power collection and high-low voltage conversion, and realize safe grid connection of new energy power. The 1000kVA medium capacity is very suitable for medium-sized new energy power stations, improving clean energy grid-connected efficiency and power utilization rate.
4.4 Infrastructure and Field Engineering Power Supply
It is applicable to highway engineering, railway transit supporting facilities, mining field operation bases and large-scale municipal infrastructure construction projects. Field engineering has complex working conditions and large centralized power load, and the outdoor anti-corrosion and weather-resistant structure of the MV&HV oil immersed transformer can adapt to harsh field environments. The multi-voltage high-voltage input design meets the power access requirements of different field power grids, providing stable and reliable three-phase power guarantee for large-scale infrastructure construction and long-term operation.
5. Frequently Asked Questions (FAQ)
Q1: How to choose between 11kV/22kV/30kV/33kV input and 380V/440V output for 1000kVA three phase oil immersed transformers?
The voltage configuration must be determined according to the actual on-site grid high-voltage line voltage and terminal equipment voltage requirements. 11kV and 22kV input models are the most common for urban municipal power grids and ordinary industrial parks, while 30kV and 33kV high-input versions are suitable for industrial heavy-load zones, remote field substations and high-voltage regional power grids. In terms of low-voltage output, 380V is the standard three-phase industrial and civil power voltage for most regions, and 440V output is customized for special industrial mechanical equipment and overseas engineering projects. Reasonable voltage matching can avoid voltage mismatch failure and ensure optimal power supply efficiency.
Q2: What are the key advantages of 1000kVA oil immersed MV&HV distribution transformer compared with dry-type transformers of the same capacity?
In practical engineering applications, the 1000kVA three-phase oil immersed power transformer has obvious advantages in cost performance, heat dissipation efficiency and environmental adaptability. The oil circulation heat dissipation system provides more uniform and efficient heat dissipation, supporting long-term full-load and short-term overload operation, which is more suitable for heavy industrial load scenarios. It features lower manufacturing cost, longer service life and stronger outdoor weather resistance, and can operate stably in dusty, humid and corrosive outdoor environments. Dry-type transformers have higher indoor fire safety but poorer overload resistance and higher cost, making the oil immersed model more suitable for outdoor substations, industrial zones and large-scale power grid distribution scenarios.
Q3: What routine maintenance is required for long-term operation of 11kV–33kV 1000kW oil immersed distribution transformers?
This fully sealed oil immersed MV&HV transformer has low daily maintenance requirements, and regular routine inspection can ensure long-term stable operation. Users need to periodically check the transformer oil level and oil quality to prevent oil leakage and insulating oil aging; clean radiator surface dust and debris to keep the heat dissipation system unobstructed and avoid high-temperature overload operation. It is also necessary to regularly detect grounding resistance and insulation performance to eliminate hidden insulation dangers, and check the tightness of wiring terminals and sealing structures. Avoid long-term over-rated load operation and frequent over-voltage impact, which can effectively reduce equipment failure rate and extend the overall service life of the transformer.
