30kVA 50kVA 80kVA 100kVA 10kV Class Three Phase Oil Immersed Transformer
30kVA 50kVA 80kVA 100kVA 10kV Class Three Phase Oil Immersed Transformer | 35kV Input, 10kV/11kV Step Up & 400V Output
1. Product Overview
This 10kV class three phase oil immersed transformer series covers four practical small and medium capacities including 30kVA, 50kVA, 80kVA and 100kVA, specially customized for multi-grade medium voltage power conversion and step-up power supply scenarios. Featuring a flexible multi-voltage design, this industrial oil filled transformer supports 35kV high input voltage, and realizes dual power conversion functions: stepping up power to standard 10kV and 11kV medium voltage, while outputting stable 400V low voltage for terminal power consumption. As a professional step-up oil immersed power transformer, it perfectly bridges the voltage mismatch between 35kV high-voltage transmission lines, medium-voltage distribution grids and low-voltage industrial and civil equipment.
Manufactured in full compliance with IEC 60076 international power equipment standards and 10kV class grid operation specifications, this three phase oil immersed transformer adopts high-quality low-loss silicon steel sheet core and high-purity copper winding structure. It eliminates the high energy consumption and unstable voltage defects of traditional old-fashioned transformers, with optimized internal magnetic circuit and winding layout to reduce no-load loss and operating vibration. Adopting mature ONAN oil-natural air-natural cooling technology and fully sealed oil tank welding process, the equipment maintains stable insulation and heat dissipation performance under long-term continuous operation. Different from conventional single-function step-down transformers, this 35kV input step-up transformer integrates medium voltage boosting and low voltage power distribution, delivering higher practical value for distributed power supply and regional grid voltage optimization projects.
Designed for global universal power system adaptation, this compact 10kV class oil immersed transformer fits both 50Hz and 60Hz grid frequency standards, supporting flexible deployment in domestic and overseas small-scale power projects. With diversified capacity options from 30kVA to 100kVA, users can select precise models according to actual load demands, effectively avoiding equipment capacity waste or insufficient power supply. Its sturdy sealed structure and reliable electromagnetic performance make it a mainstream cost-effective solution for outdoor small substations, field engineering power supply and micro new energy grid connection projects.
2. Core Product Purposes
The core purpose of the 30kVA–100kVA 10kV class three phase step-up oil immersed transformer is to realize safe, efficient and low-loss voltage lifting and hierarchical power distribution in 35kV medium and high voltage power systems, solving the common problems of terminal voltage drop, insufficient grid voltage and mismatched power generation voltage in small-scale power supply scenarios.
In actual power system operation, this 35kV input oil immersed transformer undertakes two core working functions. First, it serves as a professional medium voltage step-up device, converting 35kV high input voltage into standard 10kV and 11kV medium voltage, which meets the grid access standards of regional 10kV class distribution networks and solves the problem of unqualified voltage of scattered power generation equipment and remote power supply terminals. Second, it stably outputs 400V three-phase low voltage, providing compliant and continuous power for on-site mechanical equipment, auxiliary facilities and daily power consumption loads. This dual-purpose design of step-up transformation and low-voltage power supply simplifies the overall configuration of small power supply systems and reduces project construction costs.
Beyond basic voltage conversion, this low-loss oil immersed power transformer optimizes the operating quality of medium and small power grids. It effectively suppresses grid voltage fluctuation and low-frequency harmonic interference generated by load changes, stabilizes terminal voltage output, and reduces electric energy loss during power transmission and conversion. With excellent short-circuit resistance and overload tolerance, it can buffer instantaneous current surges caused by equipment startup and grid load peaks, isolate circuit fault risks, and protect subsequent power distribution equipment and electrical devices. The multi-capacity gradient design of 30kVA, 50kVA, 80kVA and 100kVA enables refined matching for different small-load scenarios, improving the overall power supply stability and energy utilization rate of regional micro power systems.
3. Typical Application Scenarios
3.1 Small-Scale Distributed New Energy Grid Connection
This 10kV class three phase oil immersed step-up transformer is widely applied in household and small industrial photovoltaic power stations, mini wind power plants and distributed energy storage projects. Small new energy generation equipment often produces unstable low voltage that cannot be directly connected to 10kV or 11kV municipal grids. The 30kVA to 100kVA multi-capacity models can accurately match small power generation loads, boosting generated power to standard 10kV/11kV grid-connected voltage, while supplying 400V power for on-site inverters, monitoring systems and station auxiliary equipment, realizing self-consumption and surplus power grid connection integration.
3.2 Remote Rural & Scattered Regional Power Supply
It is the ideal power transformation equipment for remote mountainous areas, scattered rural settlements and suburban decentralized power supply zones. Long-distance 35kV overhead transmission lines are prone to serious voltage drop, resulting in low terminal voltage and unstable power consumption. This 35kV input step-up transformer can effectively compensate line voltage loss, lift regional grid voltage to qualified 10kV/11kV medium voltage for secondary distribution, and output stable 400V power for residential living, agricultural irrigation equipment and rural public facilities, solving the long-standing power instability problem in remote scattered power supply areas.
3.3 Field Engineering & Temporary Construction Power Supply
Compact in structure and strong in environmental adaptability, this oil immersed transformer is highly suitable for highway construction, railway engineering, field exploration, water conservancy projects and other temporary power supply scenarios. Field projects usually rely on 35kV long-distance power transmission, and require both medium voltage power for partial engineering equipment and 400V low voltage for construction machinery, office facilities and temporary living electricity. The 30kVA–100kVA flexible capacity options can cope with different temporary load scales, and the fully sealed outdoor structure adapts to dusty, humid and temperature-changing field working conditions.
3.4 Small Industrial Workshop & Micro Enterprise Power Distribution
The transformer series is commonly used for power supply and voltage optimization of small processing workshops, agricultural product processing factories and micro industrial enterprises. Some suburban industrial areas access 35kV high-voltage lines but lack matched medium-voltage distribution equipment. This step-up transformer can convert 35kV voltage into 10kV/11kV industrial medium voltage and 400V equipment power, meeting the production and office power demand of small enterprises. Its low energy loss and stable operation effectively reduce daily power consumption costs for micro industrial users.
4. Core Product Features
4.1 Multi-Capacity Gradient & Dual Step-Up Voltage Customization
Covering 30kVA, 50kVA, 80kVA and 100kVA four mainstream small and medium capacities, this 10kV class three phase oil immersed transformer supports 35kV high voltage input, with flexible 10kV and 11kV step-up output and standard 400V low-voltage output. It fills the market gap of small-capacity multi-voltage step-up transformers, breaking the limitation of single voltage ratio of traditional distribution transformers. Users can select the most suitable capacity and voltage combination according to project load and grid access standards, achieving precise matching for small-scale power conversion scenarios with high project adaptability.
4.2 Low Loss Design & High Energy-Saving Performance
Adopting high-grade low-loss cold-rolled silicon steel core and high-purity copper winding process, this industrial oil immersed transformer effectively reduces no-load loss, load loss and magnetizing current during long-term operation. The optimized magnetic circuit structure avoids magnetic flux leakage, and the overall power conversion efficiency is significantly higher than traditional old-fashioned transformers. Even under fluctuating small-load operation of distributed power generation, it maintains stable and efficient power conversion, effectively reducing long-term power consumption and operation costs for users, with outstanding energy-saving and environmental protection advantages.
4.3 Fully Sealed Structure & Strong Environmental Adaptability
The whole machine adopts fully sealed welded oil tank and standard ONAN natural cooling system, with excellent waterproof, dustproof and moisture-proof performance. The external surface is coated with weather-resistant and anti-corrosion protective paint, which can resist ultraviolet radiation, rain erosion, high temperature exposure and low temperature freezing. It stably operates in outdoor open-air substations, dusty industrial sites and humid remote field environments, supporting long-term unattended operation. The sealed structure effectively prevents insulating oil oxidation and moisture ingress, delaying internal component aging and ensuring stable long-term equipment performance.
4.4 Stable Electromagnetic Performance & High Operation Safety
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 power generation fluctuation and load changes, avoiding coil deformation and equipment burnout. Equipped with standard pressure relief valve, oil level monitoring gauge and temperature sensing protection device, the equipment can automatically release internal overpressure and monitor operating status in real time, preventing overheating and overpressure faults. The low partial discharge design ensures safe and reliable operation in 10kV class medium voltage power systems.
4.5 Dual-Frequency Compatibility & Wide Application Versatility
Optimized for global power system standards, this three phase oil immersed step-up transformer supports stable operation under both 50Hz and 60Hz grid frequencies. The calibrated electromagnetic parameters avoid frequency-induced efficiency attenuation and voltage deviation, adapting to domestic conventional power grids and overseas small-scale engineering power systems. Its compact and lightweight structure simplifies transportation and on-site installation, and the multi-scenario adaptable design makes it applicable for new energy grid connection, rural power grid renovation and temporary engineering power supply, with extremely high market versatility.
4.6 Simple Maintenance & High Comprehensive Cost Performance
This 30kVA–100kVA 10kV class oil immersed transformer has a mature and simplified internal structure without complex vulnerable electronic components, with low daily failure rate. The fully sealed design avoids frequent oil replacement and internal cleaning, and daily maintenance only requires regular oil level inspection, oil quality detection and sealing performance check. It supports long-term unattended outdoor operation, greatly saving later operation and maintenance costs. With diversified specifications, stable step-up performance and long service life, it has superior comprehensive cost performance in small and medium power transformation projects.
5. Frequently Asked Questions (FAQ)
Q1: How to choose the right capacity from 30kVA, 50kVA, 80kVA and 100kVA for practical projects?
Capacity selection is mainly determined by actual on-site power load and future expansion reserve. The 30kVA model is suitable for ultra-small load scenarios such as single household photovoltaic power generation and tiny rural decentralized power supply. The 50kVA specification is ideal for small field temporary power supply and micro workshop power distribution with stable low load. The 80kVA model is the most versatile option, perfectly matching most small new energy power stations and suburban micro industrial power supply projects. The 100kVA high-capacity model is recommended for scenarios with slightly larger load and certain peak power consumption, such as centralized rural power supply and small-scale energy storage grid connection. It is suggested to reserve 10% load margin to adapt to subsequent power demand growth.
Q2: What is the difference between 10kV and 11kV step-up output of this 35kV input transformer?
The two output voltage grades have consistent equipment structure, insulation performance and safety standards, with the core difference lying in applicable grid access standards. The 10kV step-up output is tailored for conventional domestic urban and rural 10kV class medium voltage distribution grids, which is the most widely used specification for domestic power grid connection. The 11kV output is mainly adapted to overseas power grid standards and regional industrial dedicated 11kV distribution systems, solving the voltage matching problem of cross-border small power projects. Users only need to select the corresponding step-up voltage specification according to local grid rated voltage to ensure compliant grid connection and stable power supply.
Q3: What daily maintenance work is required for outdoor installed small-capacity oil immersed step-up transformers?
Daily maintenance for this 10kV class three phase oil immersed transformer focuses on three key points to ensure long-term stable operation. First, regularly inspect the oil tank welding seams, sealing gaskets and radiator components to eliminate insulating oil leakage hidden dangers, and check the oil level and oil clarity, replacing deteriorated and turbid insulating oil in time to maintain insulation and heat dissipation performance. Second, clean the surface and radiator dust regularly to keep the natural heat dissipation system unobstructed and prevent equipment overheating under continuous load operation. Third, periodically test the winding insulation resistance and verify the stability of 10kV/11kV step-up voltage and 400V output voltage, check the integrity of safety protection devices, and troubleshoot abnormal operating noise and temperature rise to avoid grid connection faults and equipment failure.
