Step Down Step up 50kVA 10kv 400v No Load Tap Changer Three Phase High Standard Oil Immersed
1. Product Overview
The high standard three-phase oil immersed transformer with step down and step up functions is a professional medium-voltage power conversion device designed for 10kV to 400V voltage conversion systems. Featured with a 50kVA rated capacity and built-in no load tap changer, this industrial-grade power transformer supports bidirectional voltage regulation, enabling flexible step-up and step-down power conversion between high-voltage 10kV grid and low-voltage 400V terminal equipment. Manufactured in full compliance with international electrical industry standards, this sealed oil-filled power equipment adopts optimized three-phase balanced winding structure and mature oil-immersed heat dissipation technology. It effectively solves voltage matching and power distribution problems in medium and small-scale power grid systems, industrial power supply and engineering power transformation projects. As a mainstream high-standard distribution transformer, it combines voltage regulation stability, operational safety and energy-saving performance, becoming a reliable choice for global medium-voltage power conversion scenarios.
2. Core Product Features
2.1 Bidirectional Step-Up & Step-Down Voltage Conversion
This three-phase oil immersed transformer supports flexible bidirectional voltage conversion, realizing stable step down from 10kV high voltage to 400V low voltage for daily power distribution, and adjustable step up from 400V to 10kV for grid-connected power transmission. The 50kVA fixed rated capacity is precisely calibrated to adapt to medium-load power supply demands, with balanced three-phase voltage and current output, no phase deviation or power imbalance. Different from single-function transformers, its dual voltage conversion mode greatly improves equipment versatility and meets diverse power conversion needs of different engineering and grid scenarios.
2.2 No Load Tap Changer for Precision Voltage Regulation
Equipped with a built-in no load tap changer, this 10kV 400V transformer allows safe and convenient voltage ratio adjustment under no-load conditions without power outage or equipment shutdown. The precision tap changing structure effectively compensates grid voltage fluctuation, stabilizes output voltage within the standard range, and avoids equipment operation failure caused by excessive high or low voltage. This passive voltage regulation design improves the adaptability of the transformer to unstable power grid environments, ensuring long-term stable power supply quality for terminal electrical equipment.
2.3 High-Standard Oil-Immersed Insulation & Heat Dissipation System
Adopting high-standard manufacturing processes, the 50kVA three-phase transformer uses high-purity insulating transformer oil and a fully sealed corrugated oil tank. The circulating oil cooling system efficiently dissipates heat generated by windings and cores during continuous operation, preventing overheating under rated load and intermittent peak load. The oil-immersed structure provides excellent electrical insulation, isolating internal components from external humidity, dust and corrosive substances. This design greatly enhances the equipment’s high-voltage resistance capability and environmental adaptability, ensuring safe operation in outdoor and industrial harsh environments.
2.4 Low Loss, High Stability & Long Service Life
The transformer is equipped with high-quality grain-oriented silicon steel cores and high-purity copper windings, effectively reducing no-load loss and load loss during operation. The optimized three-phase electromagnetic structure minimizes magnetic flux leakage, achieving energy-saving and low-noise operation. The overall welded steel tank features excellent tightness and mechanical strength, effectively preventing oil leakage and structural deformation. All components are made of anti-aging and high-temperature resistant materials, enabling the high-standard oil immersed transformer to maintain stable performance for more than 35 years under normal operating conditions, with extremely low daily maintenance costs.
3. Core Product Uses
3.1 Bidirectional Medium-Low Voltage Power Conversion
The primary core use of this 50kVA 10kV/400V transformer is bidirectional voltage conversion between medium-voltage power grids and low-voltage power consumption equipment. It steps down 10kV industrial and grid high voltage to standard 400V industrial and civil power supply voltage for terminal power consumption, and can also step up 400V low voltage generated by distributed power generation equipment to 10kV for grid-connected transmission. It bridges the voltage gap of medium and low voltage power systems and realizes efficient power transmission and conversion.
3.2 No-Load Voltage Regulation & Grid Stabilization
Relying on the professional no load tap changer, this three-phase oil immersed transformer realizes precise voltage adjustment without power cut. It can dynamically calibrate output voltage according to regional grid voltage changes, suppress voltage fluctuation and power harmonics, and stabilize the operation of local power distribution networks. It effectively solves the problems of unstable voltage and insufficient power supply capacity in rural power grids, remote engineering sites and old power distribution systems, improving the overall power supply quality.
3.3 Safe Power Distribution & System Operation Protection
As a core power distribution device, the high-standard oil immersed transformer undertakes centralized power distribution and load balancing tasks for three-phase power systems. Its excellent short-circuit resistance, overvoltage resistance and insulation performance can effectively buffer grid surge impact, reduce power system operation faults, and protect subsequent industrial equipment, electrical devices and power grid facilities from damage. It provides reliable safety guarantee for long-term and stable operation of medium-low voltage power distribution systems.
4. Main Application Scenarios
4.1 Urban and Rural Power Grid Distribution Transformation
In urban and rural power grid upgrading and reconstruction projects, the 50kVA 10kv 400v three-phase oil immersed transformer is widely used in community substations and rural terminal power distribution stations. The no-load voltage regulation function adapts to complex and fluctuating grid voltage conditions, while the step down conversion function provides standard 400V civil power supply for residential areas. Its high-standard safety performance fully meets the operation specifications of public power grid infrastructure.
4.2 Small and Medium Industrial Factory Power Supply
Small processing factories, light industrial workshops and manufacturing enterprises usually adopt 10kV grid access and 400V equipment power consumption standards. This step down and step up transformer provides stable medium-load power support for industrial production lines, mechanical equipment and auxiliary electrical facilities. It can also cooperate with factory distributed power generation equipment for step-up grid connection, adapting to diversified power consumption and power generation demands of small and medium industrial scenarios.
4.3 Engineering Construction & Remote Site Power Support
Field engineering projects, highway construction sites, water conservancy facilities and remote regional temporary power supply projects have high requirements for equipment stability and environmental adaptability. This high-standard oil immersed transformer features strong outdoor adaptability and convenient no-load voltage adjustment, which can flexibly cope with unstable power supply conditions in remote areas and provide continuous and stable 400V power guarantee for construction equipment and site facilities.
4.4 Distributed New Energy Grid Connection
Small-scale photovoltaic power stations and wind power generation equipment often generate 400V low-voltage electric energy, which needs to be boosted for grid-connected transmission. This three-phase step up transformer can convert 400V new energy power to standard 10kV grid voltage, realizing safe and efficient grid connection. The no load tap changer can adjust voltage parameters according to power generation fluctuation, effectively improving the utilization rate of new energy power and ensuring stable grid-connected operation.
5. Frequently Asked Questions (FAQ)
5.1 What is the working principle and advantage of the no load tap changer on this transformer?
The no load tap changer is a core voltage regulation component designed for no-power-off adjustment. It allows users to adjust the transformer voltage ratio when the equipment is in no-load state, calibrating 10kV/400V output voltage to adapt to grid voltage deviations. Compared with on-load tap changers, it features simpler structure, lower failure rate and no impact on power grid operation during adjustment. It effectively solves the problem of unstable terminal voltage caused by long-distance power transmission, ensuring consistent and standard power supply quality.
5.2 What scenarios are suitable for the 50kVA 10kV 400V step-up and step-down oil immersed transformer?
This 50kVA three-phase transformer is specially designed for medium-load medium-low voltage conversion scenarios. It is most suitable for urban and rural community power distribution, small and medium factory power supply, engineering temporary power use and small new energy grid-connected projects. The bidirectional step up and step down function makes it compatible with both grid power supply and distributed power generation scenarios, while the high-standard oil-immersed structure adapts to outdoor open-air installation and long-term continuous industrial operation environments.
5.3 Why choose oil-immersed type over dry-type transformer for 10kV 400V power distribution?
For 10kV medium-voltage power distribution scenarios, high-standard oil immersed transformers have obvious advantages over dry-type products. The oil circulation heat dissipation system provides faster and more uniform heat dissipation, supporting long-term full-load and peak-load operation. It features stronger high-voltage insulation performance, better moisture and corrosion resistance, and lower operating noise. Meanwhile, the overall manufacturing cost is more cost-effective for outdoor and industrial fixed installation, with longer service life and lower later maintenance pressure, making it more suitable for municipal grid and industrial power supply projects.
