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

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

1. Technical Parameters

2. Product Description

The 3 Phase 20kv 400v Step Up Transformer Electricity 1000kva 1250kva 1600kva Class Oil Immersed Transformer is a high-performance industrial step-up power transformer designed for low-voltage to high-voltage power conversion. As a mainstream oil-filled power transformation equipment in the power distribution industry, this three-phase oil immersed step-up transformer adopts mature S11 series manufacturing technology, which effectively converts 400V low-voltage industrial electricity into 20kV high-voltage power, solving the power transmission and voltage matching problems of medium and large power consumption scenarios.

This 20kV class oil immersed transformer adopts fully sealed oil tank structure and high-quality insulating oil, which can realize natural heat dissipation and insulation protection. Different from dry-type transformers, the oil immersed design has better heat dissipation efficiency and overload resistance, suitable for long-term continuous operation. The product covers three mainstream power levels of 1000kVA, 1250kVA and 1600kVA, which can meet the power demand differences of different engineering projects. All finished products pass 100% factory acceptance test, including insulation test, loss test and short-circuit resistance test, fully complying with international electrical safety standards.

In terms of structural design, this heavy-duty step-up electrical transformer uses high-purity silicon steel sheets for the iron core and high-strength copper windings, which greatly reduces no-load loss and operating noise. The adjustable voltage tap design enables the equipment to adapt to unstable grid voltage environments, ensuring stable output of 20kV high voltage. It is a reliable core equipment for industrial power upgrading, rural grid reconstruction and new energy power transmission projects.

3. Product Core Features

This 3 phase 20kV/400V oil immersed step-up transformer has outstanding performance advantages in energy saving, stability, durability and applicability, and is favored by power engineering contractors and industrial enterprise users. The core product features are summarized as follows:

3.1 Excellent Energy-saving Performance

Adopts high-grade oriented silicon steel sheet core and optimized winding layout, which effectively reduces magnetic leakage and iron loss. The no-load loss and load loss of 1000kVA, 1250kVA and 1600kVA models are far lower than the national standard, achieving long-term energy-saving operation and reducing the operating cost of power grid and industrial enterprises. It is a typical low-loss power transformation equipment suitable for long-term continuous power supply.

3.2 Stable Voltage Conversion Capacity

Supporting 400V to 20kV stable step-up conversion, matched with ±2×2.5% adjustable voltage tap, it can effectively cope with grid voltage fluctuation. The Dyn11 vector group design ensures balanced three-phase voltage output, suppresses harmonic interference, avoids voltage imbalance and equipment burnout, and guarantees the safe and stable operation of subsequent high-voltage power equipment.

3.3 Strong Environmental Adaptability

The fully sealed oil immersed structure prevents external moisture, dust and corrosive gas from entering the tank, with good moisture-proof, dust-proof and anti-corrosion performance. It can work stably in the temperature range of -25℃ to +40℃ and conventional outdoor and indoor environments. The ONAN natural cooling mode does not rely on auxiliary cooling equipment, with low failure rate and strong environmental adaptability.

3.4 Durable and Low Maintenance

The overall structure is firm and compact, with strong short-circuit resistance and mechanical shock resistance. High-quality insulating oil has stable chemical properties, no deterioration for a long time, and the fully sealed design avoids frequent oil replacement and maintenance. The service life of the whole machine can reach more than 30 years, which greatly reduces the later maintenance cost and downtime loss of the equipment.

3.5 Complete Safety Protection

Strictly implement IEC and GB power industry standards, with high insulation level and strong lightning impulse resistance. It is equipped with overvoltage, overcurrent and short-circuit protection functions, which can automatically isolate faults in case of abnormal power grid conditions, effectively protecting the transformer body and rear-end power consumption equipment, and improving the overall safety of the power distribution system.

4. Core Purpose & Application Scenarios

4.1 Core Purpose

The core function of this 20kv 400v oil immersed step up transformer is to realize three-phase low voltage to high voltage power conversion. It mainly boosts the 400V low-voltage power generated by distributed power sources, industrial power distribution rooms and temporary power stations into 20kV medium-voltage power, so as to meet the requirements of long-distance power transmission, grid-connected power generation and high-voltage equipment power supply. It is widely used for power voltage upgrading, power grid capacity expansion and power transmission matching in various industrial and civil power scenarios.

4.2 Main Application Scenarios

New Energy Power Generation Industry: Suitable for wind power plants, photovoltaic power stations and biomass power generation projects. The 1000kVA-1600kVA capacity models can match the power generation demand of medium and small new energy stations, boost the low-voltage power generated by power generation equipment to 20kV grid-connected voltage, and realize stable grid-connected power transmission.

Industrial Park Power Distribution: Applied to large manufacturing parks, chemical industrial zones, mining enterprises and factory centralized power supply systems. It solves the problem of insufficient low-voltage power transmission distance and large loss, and realizes long-distance and low-loss power supply for industrial high-power equipment.

Power Grid Reconstruction Project: Used for urban and rural power grid upgrading and old community power transformation. It replaces outdated high-loss transformers, improves grid power supply capacity and voltage stability, and meets the increasing daily power consumption and industrial power demand of residents.

Temporary Engineering Power Supply: Suitable for large infrastructure projects, highway and railway construction, field engineering operation and other scenarios. It provides stable 20kV high-voltage power support for temporary large-scale mechanical equipment and engineering power distribution systems.

Commercial & Civil Supporting Facilities: Applied to large shopping malls, hospital power distribution rooms, school power supply systems and residential community centralized power supply projects, ensuring stable and reliable medium-voltage power supply for public infrastructure.

5. FAQ (Frequently Asked Questions)

5.1 What is the difference between this 20kV 400V step-up oil immersed transformer and ordinary distribution transformer?

Most ordinary distribution transformers are step-down equipment, which converts high voltage to low voltage for terminal power consumption. This 3 phase oil immersed transformer is a professional step-up transformer, specially designed for 400V to 20kV voltage conversion. It has optimized winding structure and voltage resistance design for step-up working conditions, with higher voltage conversion accuracy and stronger overload capacity. Meanwhile, it has lower operating loss than ordinary transformers of the same capacity, which is more suitable for long-distance power transmission and new energy grid-connected scenarios.

5.2 Which capacity model (1000kVA/1250kVA/1600kVA) is suitable for industrial park power supply?

For small and medium-sized industrial parks with single-point power load below 800kW, the 1000kVA oil immersed step-up transformer is the most cost-effective choice; for standard industrial parks with multiple production workshops and stable load of 800-1000kW, the 1250kVA model is recommended to reserve sufficient load margin; for large industrial parks with high-power equipment and long-term peak load of more than 1000kW, the 1600kVA high-capacity transformer is preferred to avoid equipment overload operation and ensure stable power supply. Users can select the model according to actual peak load and future capacity expansion demand.

5.3 What are the daily maintenance requirements for this oil immersed step-up transformer?

This fully sealed 20kV class oil immersed transformer has low daily maintenance pressure. It only needs regular visual inspection of the oil tank for oil leakage, inspection of the insulation state of high and low voltage bushings, and detection of operating temperature and noise. Since the equipment adopts fully sealed design, there is no need to replace insulating oil frequently. It is recommended to conduct a comprehensive performance test every 3 years and a professional overhaul every 10 years. It should be noted that the equipment must operate within the rated load and ambient temperature range to avoid long-term overload operation affecting the service life.