3 Phase 20kv 400v Step Up Transformer Electricity 1000kva 1250kva 1600kva Class Oil Immersed Transfo

3 Phase 20kv 400v Step Up Transformer Electricity 1000kva 1250kva 1600kva Class Oil Immersed Transformer

1. Product Description

The 3 Phase 20kv 400v Step Up Transformer Electricity 1000kva 1250kva 1600kva Class Oil Immersed Transformer is a professional medium-voltage power boosting device widely adopted in industrial power systems and distributed power generation projects. This three-phase oil immersed step-up transformer is engineered specifically for 400V low-voltage to 20kV medium-voltage power conversion, covering three mainstream rated capacities of 1000kVA, 1250kVA and 1600kVA to match different power load requirements of on-site engineering projects. Manufactured in full compliance with IEC 60076 international power standards and industrial class power distribution specifications, it belongs to a high-reliability class oil immersed power transformer widely used in modern power transmission and distribution fields.

Different from conventional step-down distribution transformers, this 20kV class step-up transformer features a customized electromagnetic winding structure to ensure precise voltage elevation and balanced three-phase output. It adopts high-quality low-loss silicon steel core and high-purity copper windings, paired with standard ONAN oil natural air natural cooling system and fully sealed oil tank structure. The high-grade insulating oil inside the equipment provides stable insulation protection and efficient heat dissipation during long-term operation. Designed for continuous heavy-load operation, this 3-phase 400V to 20kV power transformer effectively solves the technical pain points of short transmission distance and high line loss of low-voltage electricity, becoming essential core equipment for on-site power boosting and grid-connected power transmission.

2. Core Product Features

This series of 1000kVA, 1250kVA and 1600kVA 3 Phase 20kv 400v Step Up Oil Immersed Transformers has outstanding practical performance advantages in energy efficiency, operational stability, environmental adaptability and safety protection, fully adapting to high-intensity industrial operation and outdoor unattended power supply scenarios.

2.1 Accurate Step-Up Voltage Conversion and Three-Phase Balance

Optimized with professional electromagnetic calculation and winding layout, the 20kV step-up transformer can stably convert standard 400V industrial low voltage to 20kV medium transmission voltage. The strict three-phase balance design effectively suppresses current deviation and voltage fluctuation, ensuring consistent power output of each phase during full-load and partial-load operation. Whether it is 1000kVA light-medium load, 1250kVA conventional load or 1600kVA heavy-load operation, the equipment maintains stable voltage conversion accuracy, avoiding power quality problems that affect grid-connected power transmission.

2.2 Low Energy Loss and High Energy-Saving Efficiency

Equipped with high-permeability grain-oriented silicon steel sheets and optimized magnetic circuit structure, this class oil immersed transformer greatly reduces no-load loss, load loss and magnetic leakage loss. Compared with traditional old-style step-up transformers, the overall operating power consumption is significantly reduced. The high-efficiency power conversion design keeps energy utilization rate above industry standard for a long time, effectively lowering daily operating power costs for industrial users and power grid operators, and meeting modern power system energy-saving and low-carbon operation requirements.

2.3 Fully Sealed Oil Immersed Structure with Low Maintenance

Adopting integral fully welded sealed steel tank and vacuum oil injection process, the internal insulating oil and windings are completely isolated from external air, dust and moisture. This structural design prevents insulating oil aging, oxidation and moisture absorption, eliminating frequent oil replacement and internal maintenance work required by open-type transformers. The reliable sealing performance effectively avoids common oil leakage faults, realizing long-term maintenance-free operation and greatly reducing later operational and maintenance investment.

2.4 Natural Air Cooling with Strong Continuous Operation Capacity

Relying on mature ONAN natural air cooling technology, the transformer realizes passive heat dissipation through natural circulation of internal insulating oil and external air convection, without auxiliary cooling fans or water cooling equipment. The large-area corrugated radiator ensures uniform and rapid heat exchange, keeping internal temperature rise within a safe range even during 24-hour uninterrupted full-load operation. The whole machine runs with ultra-low noise and stable performance, suitable for long-term unattended operation.

2.5 Excellent Safety Performance and Environmental Adaptability

Built-in multiple safety protection mechanisms including over-temperature protection, overload protection and short-circuit protection can quickly respond to grid abnormal faults to protect internal components. The transformer shell undergoes anti-corrosion, rust-proof and weather-resistant spraying treatment, adapting to outdoor open-air, high-temperature, low-temperature and humid harsh environments. With strong short-circuit impact resistance and seismic stability, the service life of this 3-phase step-up electricity transformer can reach more than 30 years under standard operating conditions.

3. Core Usage

As a key medium-voltage power boosting equipment in power distribution systems, the 3 Phase 20kv 400v Step Up Transformer Electricity 1000kva 1250kva 1600kva Class Oil Immersed Transformer mainly undertakes the core function of lifting 400V low-voltage industrial electricity to standard 20kV medium-voltage power. It acts as a critical power conversion hub connecting low-voltage power generation equipment and medium-voltage power transmission lines, solving the bottleneck of low-voltage power unable to transmit over long distances.

In actual engineering operation, this oil immersed step-up transformer can effectively reduce line transmission loss, improve power transmission efficiency, and standardize terminal power quality. It is widely used for power boosting and grid-connected power transmission of decentralized power supply systems, stabilizing grid operation load and optimizing regional power distribution structure. The three capacity specifications of 1000kVA, 1250kVA and 1600kVA can flexibly match different power generation scales and load demands, ensuring safe, stable and efficient power transmission for industrial power supply and new energy grid-connected projects.

4. Application Scenarios

Benefiting from flexible capacity matching, stable boosting performance and strong environmental adaptability, this 20kV 400V three-phase oil immersed step-up transformer covers multiple mainstream engineering scenarios, and is the preferred power conversion equipment for new energy projects, industrial park power supply and field engineering power distribution.

4.1 Distributed New Energy Power Generation Projects

It is the most widely used scenario for this series of step-up transformers, suitable for small and medium-sized photovoltaic power stations, wind power generation systems and biomass power plants. The low-voltage electric energy generated by new energy units is boosted to 20kV medium voltage through 1000kVA, 1250kVA or 1600kVA oil immersed transformers, realizing centralized collection and grid-connected transmission of clean energy, effectively improving new energy power utilization and grid-connected stability.

4.2 Industrial Park On-Site Power Boosting

Applicable for self-provided power stations and power distribution rooms of large industrial parks, manufacturing factories and mining enterprises. On-site 400V low-voltage self-generated power cannot be transmitted remotely, and this 3-phase 20kV step-up transformer can complete voltage elevation, supporting long-distance power transmission and internal power scheduling within the park, solving the problem of insufficient on-site power supply capacity and power waste.

4.3 Municipal and Rural Power Grid Renovation

Suitable for rural power grid upgrading and regional decentralized power supply renovation projects. For remote areas with scattered power loads and long power supply lines, low-voltage power transmission has large loss and unstable voltage. This class oil immersed step-up transformer boosts terminal voltage to 20kV medium voltage, reducing line loss and improving overall power supply quality and coverage of regional power grids.

4.4 Field Engineering and Temporary Power Supply

Widely used in temporary power boosting for highway construction, water conservancy projects, railway engineering and field exploration operations. With excellent outdoor weather resistance and low-maintenance design, the equipment can operate stably in field open-air environments for a long time, providing reliable medium-voltage power guarantee for large-scale engineering construction equipment.

4.5 Commercial and Public Power Distribution Optimization

Matched with supporting power systems of large commercial complexes and public facilities, it is used for auxiliary power boosting and peak load regulation of regional power distribution, balancing grid load distribution and improving the stability and reliability of urban terminal power supply.

5. FAQ

5.1 How to choose between 1000kVA, 1250kVA and 1600kVA step-up transformer capacities?

The three capacity specifications are designed for different load scales, with consistent voltage ratio and structural performance. The 1000kVA oil immersed step-up transformer is suitable for small-scale distributed photovoltaic projects and light-load industrial power boosting scenarios with stable and low power demand. The 1250kVA model is the most versatile mainstream specification, perfectly matching most medium-sized new energy power stations and conventional industrial park power supply projects with moderate load fluctuation. The 1600kVA high-capacity transformer is tailored for medium and large power generation projects and heavy-load industrial scenarios with large peak load and future power demand growth. Users can select the model according to actual average load, peak load and project expansion plans.

5.2 What is the core advantage of 400V to 20kV step-up oil immersed transformer compared with dry-type transformers?

For medium-voltage 20kV step-up working conditions, class oil immersed transformers have obvious practical advantages over dry-type products. This oil immersed step-up transformer adopts insulating oil circulating heat dissipation, with larger heat capacity and stronger overload resistance, which can adapt to long-term continuous heavy-load operation. It features lower manufacturing cost, more stable voltage conversion performance and longer service life in outdoor and field environments. Dry-type transformers are limited by air cooling conditions, with poor heat dissipation effect and weak overload capacity, and are only suitable for indoor environments. For outdoor power boosting, new energy grid connection and industrial long-term operation scenarios, oil immersed step-up transformers have higher stability and cost performance.

5.3 What routine maintenance does this 3-phase 20kV step-up transformer need in daily operation?

This fully sealed class oil immersed transformer belongs to low-maintenance power equipment with simple daily management. Operators only need to conduct regular visual inspections to check for tank oil leakage, terminal looseness and abnormal operating noise and temperature. It is necessary to clean radiator surface dust regularly to ensure unobstructed natural heat dissipation. Thanks to the fully sealed structure, internal insulating oil is isolated from the outside air, with slow aging speed, and does not need annual replacement. Professional oil quality testing and partial discharge detection can be carried out every 6–8 years. Standard simple maintenance can effectively avoid operational faults and extend the service life of the equipment.