315KVA 400KVA 10KV 11KV 0.4KV 0.415KV Three Phase Oil Immersed Transformer
1. Product Overview
The 315KVA 400KVA 10KV 11KV 0.4KV 0.415KV Three Phase Oil Immersed Transformer is a high-performance medium-capacity distribution transformer engineered for global industrial, municipal and utility three-phase power systems. Manufactured in strict accordance with IEC 60076 and national power industry standards, this dual-voltage grade oil immersed transformer supports two mainstream high-voltage input levels of 10KV and 11KV, paired with dual low-voltage output options of 0.4KV and 0.415KV, fully adapting to domestic and international power grid voltage specifications. Covering two classic capacity models of 315KVA and 400KVA, this three-phase power conversion equipment adopts mature fully sealed oil cooling technology and high-precision winding structure, serving as core voltage regulation and power distribution equipment for medium and small load power supply scenarios.
As an upgraded energy-saving distribution transformer series, this three-phase oil immersed device solves the voltage matching problem between 10KV/11KV medium-voltage transmission lines and 0.4KV/0.415KV terminal electrical equipment. The dual high and low voltage flexible matching design breaks the limitation of single voltage specification of traditional transformers, meeting the diversified voltage demands of different regional power grids and overseas engineering projects. With low operating loss, strong short-circuit resistance and excellent environmental adaptability, the 315KVA and 400KVA three phase oil immersed transformers are widely used in urban and rural power grid renovation, light industrial factory power supply, commercial facility distribution and overseas power engineering construction, becoming one of the most cost-effective universal power transformation solutions.
2. Core Product Features
2.1 Dual Voltage Grade Flexible Matching Design
This three phase oil immersed transformer features unique dual voltage combination adaptation, supporting 10KV and 11KV high-voltage input switching, as well as 0.4KV and 0.415KV low-voltage output configuration. The 10KV/0.4KV specification is suitable for conventional domestic municipal power grids, while the 11KV/0.415KV voltage ratio perfectly matches overseas industrial power supply and international standard power distribution systems. The flexible voltage matching function avoids equipment replacement caused by different grid voltage standards, greatly improving product universality and project applicability, and meeting the customized power conversion demands of domestic and cross-border power engineering.
2.2 Graded Capacity for Diversified Medium-Load Scenarios
Available in 315KVA and 400KVA two mainstream medium-capacity specifications, the transformer series achieves precise coverage of small and medium three-phase load demands. The 315KVA three phase oil immersed transformer is compact and energy-saving, ideal for light-load and intermittent power consumption scenarios with stable daily load and low peak fluctuation. The upgraded 400KVA oil immersed distribution transformer enhances continuous load-carrying capacity and intermittent overload resistance, adapting to medium-load industrial production and centralized commercial power supply scenarios with frequent load changes. Both capacity models maintain consistent low-loss performance and structural stability, realizing hierarchical matching for different power consumption scales.
2.3 Low-Loss Energy-Saving & Stable Three-Phase Operation
Adopting high-permeability grain-oriented silicon steel core and high-purity oxygen-free copper windings, the 315KVA and 400KVA three phase oil immersed transformers effectively reduce no-load loss, load loss and magnetic leakage loss during long-term continuous operation. The optimized symmetrical three-phase winding structure ensures balanced voltage and current output, eliminates three-phase unbalanced power loss and harmonic interference, and significantly improves terminal power supply quality. Compared with traditional old-generation transformers, this energy-saving model effectively reduces long-term grid operating energy consumption and operational costs, fully complying with modern low-carbon and energy-saving power grid construction standards.
2.4 Fully Sealed Oil Immersed Cooling & Long Service Life
Equipped with a fully sealed corrugated oil tank structure and natural oil circulation cooling system, the transformer uses high-purity insulating mineral oil as dual insulation and heat dissipation medium. The circulating oil flow quickly dissipates internal heat generated by core and winding operation, maintaining stable temperature rise even under full-load and intermittent overload conditions. The fully sealed design completely isolates internal components from external air, moisture and dust, preventing insulating oil aging, oxidation and moisture absorption, avoiding internal insulation degradation and short-circuit faults. This maintenance-friendly structure greatly extends the service life of the three-phase oil immersed transformer and reduces daily maintenance workload and costs.
2.5 Strong Environmental Adaptability & Complete Safety Protection
Designed for dual indoor and outdoor installation, the medium-capacity oil immersed transformer adopts multi-layer anti-corrosion and weather-resistant coating, adapting to ambient temperatures from -25℃ to +40℃, high humidity, dusty and ultraviolet exposure environments. It has excellent mechanical stability and short-circuit withstand capability, resisting grid surge and instantaneous load impact. Built-in multiple safety mechanisms including over-current protection, over-temperature protection and pressure relief protection can quickly cut off power supply in case of faults, effectively protecting power grid operation and terminal electrical equipment safety, realizing long-term unattended stable operation.
3. Core Uses
The 315KVA 400KVA 10KV 11KV 0.4KV 0.415KV Three Phase Oil Immersed Transformer is dedicated to medium-voltage power conversion, power distribution optimization and power quality stabilization in three-phase AC power systems. Its core function is to step down 10KV and 11KV medium-voltage grid electric energy into standard 0.4KV and 0.415KV low-voltage power, solving the voltage level mismatch between medium-voltage transmission lines and industrial, commercial and civil three-phase terminal equipment.
In practical power system operation, this universal oil immersed distribution transformer stabilizes terminal output voltage, suppresses grid voltage fluctuation and harmonic interference, and reduces medium and short-distance power transmission loss. The 315KVA model undertakes light and medium-load daily power distribution tasks, while the 400KVA model supports continuous medium-load and peak intensive power consumption. It is widely applied for regional power grid voltage regulation, old grid capacity expansion, new energy power matching and engineering temporary power guarantee, effectively improving the reliability, stability and energy utilization rate of urban and rural power distribution networks, and adapting to both domestic and international standard power supply demands.
4. Main Application Scenarios
4.1 Urban & Rural Power Grid Renovation and Distribution
This three phase oil immersed transformer series is the mainstream core equipment for urban community power distribution, rural power grid upgrading and township power station construction. The 10KV/0.4KV voltage model adapts to domestic conventional power grid standards, providing stable power supply for residential clusters, rural villages and township public facilities. The 315KVA specification meets basic civilian and light industrial power demands, while the 400KVA model solves peak voltage drop and insufficient capacity problems in densely populated areas, optimizing regional power grid structure and improving civil power supply quality.
4.2 Light Industrial & Small Factory Power Supply
Widely applicable to small processing factories, light industrial workshops, mechanical processing bases and mining auxiliary power supply scenarios. Industrial three-phase equipment such as production lines, motors and automated control systems requires stable low-voltage power support. The 315KVA and 400KVA oil immersed transformers adapt to long-term continuous operation and frequent load changes in light industrial production, ensuring stable equipment operation and avoiding production shutdown caused by power quality instability.
4.3 Overseas Engineering & International Power Projects
Thanks to the 11KV/0.415KV international standard voltage configuration, this three-phase oil immersed transformer is widely used in overseas municipal power construction, foreign industrial park supporting projects and cross-border power engineering projects. It perfectly matches the low-voltage power consumption standard of 0.415KV in most overseas regions, solving the voltage adaptation problem of international engineering power distribution equipment, and is a universal power transformation device for global medium and small power engineering projects.
4.4 Commercial & Public Facility Power Distribution
Suitable for shopping malls, office buildings, schools, hospitals and other commercial and public service facilities. These scenarios have stable centralized three-phase loads such as central air conditioning, elevator systems and power distribution cabinets. The low-loss and high-stability performance of the transformer provides continuous and safe power guarantee for public facilities and commercial operation, reducing daily power consumption loss and improving power supply continuity.
4.5 Distributed New Energy & Temporary Power Projects
It serves as supporting power conversion equipment for small and medium-sized distributed photovoltaic power stations and rural wind power generation systems, realizing voltage stabilization and grid-connected matching for new energy power generation. Meanwhile, the flexible installation and strong environmental adaptability make it ideal for temporary power supply of construction sites, municipal engineering and field operation projects, quickly building stable medium-voltage power distribution systems to meet temporary engineering power demands.
5. Frequently Asked Questions (FAQ)
5.1 What is the difference between 0.4KV and 0.415KV low-voltage output of this transformer?
The315KVA 400KVA three phase oil immersed transformer is designed with dual low-voltage outputs to adapt to different regional power standards. The 0.4KV output is the standard low-voltage specification for domestic Chinese municipal and industrial power grids, suitable for most domestic power distribution scenarios. The 0.415KV low-voltage grade matches international common power supply standards, widely used in Southeast Asia, Africa and other overseas engineering projects. In actual operation, the two voltage specifications have consistent operational stability and energy-saving performance, only differing in applicable grid standards, and users can select the matching voltage configuration according to local grid requirements.
5.2 How to choose between 315KVA and 400KVA capacity models?
Capacity selection should be based on actual load power and peak power consumption demand. The 315KVA three phase oil immersed transformer is suitable for light-load scenarios with stable power consumption, including ordinary residential communities, small rural villages, and small light industrial workshops with low peak fluctuation. The 400KVA oil immersed distribution transformer is recommended for medium-load scenarios with intensive peak power consumption, such as commercial clusters, medium-sized processing factories and township centralized power supply areas. It is suggested to reserve 10%-20% load margin to avoid long-term full-load operation, effectively extending the service life of the transformer and ensuring stable long-term operation.
5.3 What are the applicable scenarios for 10KV and 11KV high-voltage input?
The dual high-voltage input design of 10KV and 11KV greatly improves the universality of the three phase oil immersed transformer. The 10KV high-voltage input is mainly applicable to domestic urban and rural conventional medium-voltage power grids, matching domestic power grid transformation and daily power distribution projects. The 11KV high-voltage specification is a mainstream international medium-voltage standard, widely adapted to overseas industrial power grids, foreign municipal power construction and cross-border power engineering projects. Users can switch the high-voltage wiring mode according to local grid voltage grades, realizing flexible matching of different medium-voltage power systems without replacing equipment.
