1250KVA 1600KVA Three-Phase Power Transformer 15KV 400V Encapsulated Oil Immersed

1250KVA 1600KVA Three-Phase Power Transformer 15KV 400V Encapsulated Oil Immersed 220V/380V Output 10KV/6KV Input

1. Product Description

This 1250KVA and 1600KVA three-phase power transformer is an encapsulated oil immersed distribution transformer built for medium-voltage power grid and industrial power distribution systems, supporting flexible dual input voltage options of 6KV and 10KV, with multi-range low-voltage output including 220V, 380V and 400V. Designed for industrial and municipal power conversion scenarios that require large load capacity and stable power supply, this heavy-duty oil filled power equipment also adapts to 15KV-grade grid operating environments, covering most mainstream medium-voltage power distribution specifications for domestic and overseas industrial projects. As a high-capacity encapsulated oil immersed transformer, it integrates sealed insulation structure and optimized three-phase winding design, effectively solving unstable voltage output and high operating loss problems of traditional large-capacity distribution transformers.

Manufactured in strict accordance with IEC and national power industry standards, the equipment adopts high-quality low-loss silicon steel sheet core and high-purity copper three-phase windings, paired with mature oil natural air natural cooling technology and integral encapsulated sealing process. The advanced encapsulation treatment effectively locks internal insulating oil, prevents oil leakage, dust invasion and moisture aging, greatly improving the overall operational stability and safety of the transformer. With two mainstream rated capacities of 1250KVA and 1600KVA, the product can cope with long-term high-load continuous power supply demands, while the multi-voltage input and output design realizes flexible matching of industrial single-phase and three-phase loads, avoiding equipment model mismatch in complex power distribution scenarios.

Every unit undergoes rigorous factory testing including high-voltage withstand detection, full-load aging debugging, insulation resistance verification and three-phase balance calibration. Whether operating with 6KV and 10KV medium-voltage input or converting to 220V, 380V and 400V terminal voltage output, the transformer maintains ultra-low voltage regulation rate and balanced current distribution. It is a reliable, energy-saving and highly adaptable large-capacity three-phase oil immersed power transformer widely used in industrial park power distribution, municipal substation upgrading and factory power transformation projects.

2. Core Purpose

The core purpose of this 1250KVA/1600KVA encapsulated oil immersed three-phase transformer is safe, efficient and stable medium-to-low voltage power conversion for 6KV, 10KV and 15KV medium-voltage power systems. It mainly steps down medium-voltage grid power into standard 220V single-phase voltage and 380V/400V three-phase industrial voltage, bridging the voltage gap between medium-voltage transmission lines and terminal industrial, commercial and municipal power consumption equipment, and undertaking core power distribution and power transmission tasks for large-load power supply scenarios.

Beyond basic voltage step-down functions, this high-capacity oil immersed power transformer undertakes regional grid load balancing and power quality optimization work. It can effectively balance three-phase load deviation under long-term high-load operation, suppress grid voltage fluctuation, instantaneous current surge and harmonic interference, and reduce no-load loss and load operation loss of medium-voltage distribution networks. The optimized encapsulation sealing structure enhances insulation stability in complex environments, lowering equipment failure rate and long-term grid operation and maintenance costs for power supply enterprises and industrial users.

In addition, the equipment acts as a key safety isolation unit in medium-voltage power distribution systems. The high-strength oil insulation and encapsulated sealing structure achieves complete physical isolation between high-voltage input terminals and low-voltage output terminals, effectively blocking high-voltage surge impact and electric leakage risks. It supports long-term unattended continuous operation, ensuring uninterrupted and stable power supply for large industrial production, municipal infrastructure and commercial complex high-power load scenarios.

3. Application Scenarios

3.1 Large Industrial Park Power Distribution Projects

This 1250KVA and 1600KVA three-phase oil immersed transformer is the core power distribution equipment for large manufacturing industrial parks, chemical plants, metallurgical bases, mechanical processing factories and new energy supporting industrial zones. These industrial scenarios feature long-term high-load operation and mixed single-phase and three-phase power consumption demands. The 6KV/10KV medium-voltage input adapts to factory medium-voltage grid standards, while 220V, 380V and 400V multi-output voltages fully meet the power supply needs of production line equipment, large motors, frequency conversion devices and factory auxiliary electrical systems. The encapsulated oil immersed structure adapts to dusty and high-temperature industrial workshop environments.

3.2 Municipal Substation & Urban Grid Upgrading

It is widely applied in urban regional substations, municipal power grid renovation, capacity expansion and upgrading projects, and suburban centralized power supply stations. Urban power grids have dense loads and complex power consumption types, requiring both 380V/400V three-phase power for public infrastructure and 220V single-phase power for residential and commercial use. This high-capacity encapsulated transformer can stably undertake large-scale urban power distribution tasks, effectively solving peak power shortage and voltage instability problems in urban power grids, and improving the overall power supply capacity of municipal power systems.

3.3 Commercial Complex & Public Infrastructure

Suitable for large shopping malls, office building clusters, airport supporting facilities, railway stations, hospital campuses and urban sewage treatment plants. These public and commercial scenarios have high requirements for power supply stability and safety, with diversified load types and large instantaneous power consumption. The multi-voltage output design of the transformer can perfectly match office equipment, lighting systems, central air conditioning and large public service equipment, while the sealed oil immersed structure ensures low failure rate and long-term stable operation of public power distribution systems.

3.4 Medium-Voltage Engineering & Overseas Power Projects

With adaptive performance for 6KV, 10KV and 15KV medium-voltage grades and universal low-voltage output specifications, the equipment is applicable to overseas industrial construction projects and cross-regional power grid renovation. The dual-capacity configuration of 1250KVA and 1600KVA can flexibly match different regional load demands, and the encapsulated anti-leakage design adapts to diverse outdoor and indoor engineering environments, solving equipment matching difficulties in medium-voltage power distribution projects of different countries and regions.

4. Product Features

4.1 Multi-Voltage Grade Flexible Matching Performance

This three-phase encapsulated oil immersed transformer breaks the limitation of single voltage specification of traditional transformers, supporting 6KV, 10KV and 15KV multi-grade medium-voltage input, and covering 220V, 380V and 400V full-range low-voltage output. It can freely switch between single-phase and three-phase power supply modes according to on-site load demands, fully adapting to mixed power consumption scenarios of industry, commerce and civil use. The multi-voltage universal design eliminates customized procurement costs and improves the flexibility of power distribution engineering design.

4.2 Dual High-Capacity Grade High-Load Adaptability

Covering 1250KVA and 1600KVA two mainstream large capacities, the product accurately matches different high-load power supply demands. The 1250KVA model is suitable for conventional large industrial and municipal conventional load scenarios, while the 1600KVA high-capacity version meets intensive peak load and high-power continuous operation requirements. Both capacities adopt optimized three-phase balance winding technology, ensuring uniform current distribution, no overload heat accumulation and stable full-load operation for 24 hours, with strong load impact resistance.

4.3 Encapsulated Oil Immersed Sealed Structure

Different from ordinary open-type oil immersed transformers, this equipment adopts integral encapsulated sealing technology, which completely seals internal insulating oil and windings. The process effectively prevents oil leakage, moisture infiltration, dust accumulation and insulating oil aging, solving common faults such as insulation decline and short circuit caused by poor sealing of traditional transformers. The high-performance insulating oil and natural oil cooling system cooperate to achieve uniform heat dissipation, maintaining stable operating performance in high temperature, humid and dusty harsh environments.

4.4 Ultra-Low Loss & Energy-Saving Operation

Adopting high-permeability low-loss silicon steel core and high-purity copper winding structure, the transformer minimizes magnetic flux leakage and coil resistance loss. The optimized magnetic circuit design greatly reduces no-load loss and load loss during long-term operation, with higher power transmission efficiency than traditional old-fashioned transformers. It can effectively reduce daily power consumption and grid transmission loss, helping users save long-term operating costs and meet industrial energy-saving and emission-reduction standards.

4.5 High Safety & Low Maintenance Cost

Equipped with complete overvoltage, overload and short-circuit protection mechanisms, the equipment can quickly cut off faulty circuits in case of grid abnormalities and load faults, protecting terminal equipment and grid safety. The fully encapsulated sealed structure requires no frequent oil replacement and routine maintenance, greatly reducing later operation workload and maintenance costs. The standardized overall structure supports various installation methods, with simple on-site debugging and long service life, achieving high cost performance for large-scale power distribution projects.

5. Frequently Asked Questions (FAQ)

5.1 How to select between 1250KVA and 1600KVA capacity for actual engineering scenarios?

The 1250KVA three-phase oil immersed transformer is ideal for conventional large industrial workshops, ordinary urban regional power distribution stations and commercial park projects with stable and moderate high loads, offering cost-effective stable power supply. The 1600KVA high-capacity model is recommended for industrial parks with dense high-power equipment, urban core grid upgrading projects and scenarios with frequent peak load surges. Choosing the right capacity according to actual load can avoid long-term overload operation or idle energy waste, ensuring optimal operating efficiency and service life of the transformer.

5.2 What are the differences and applicable scenarios for 6KV/10KV input and 220V/380V/400V output?

6KV and 10KV are mainstream medium-voltage input grades for industrial and municipal power grids; 6KV input is mostly used for old factory power transformation and small and medium industrial power distribution, while 10KV input adapts to most new urban power grids and large industrial park projects. In terms of output voltage, 220V is dedicated to single-phase civilian and commercial equipment power supply, 380V is the standard three-phase industrial voltage for conventional mechanical equipment, and 400V output is suitable for high-power industrial equipment and standardized industrial power distribution systems, meeting differentiated terminal power consumption demands.

5.3 What core advantages does encapsulated oil immersed structure have over ordinary oil immersed transformers?

Traditional ordinary oil immersed transformers are prone to oil leakage, dust accumulation and insulation aging after long-term outdoor and industrial operation, leading to increased failure rate. This encapsulated oil immersed power transformer adopts integral sealing encapsulation technology, which completely isolates internal components from external air and dust. It features better waterproof, moisture-proof and anti-corrosion performance, lower operating loss and more stable insulation performance. It requires almost no daily maintenance, effectively reducing long-term operational risks and maintenance costs, and is more suitable for long-term unattended high-load operation in industrial and municipal key scenarios.