1000kva 10kv 400v Oil Immersed Transformer Electrical Transformers

1000kva 10kv 400v Oil Immersed Transformer Electrical Transformers

1. Product Overview

The 1000kva 10kv 400v Oil Immersed Transformer Electrical Transformers are high-capacity three-phase distribution transformers widely deployed in commercial, industrial and municipal power grid systems. Manufactured in strict accordance with IEC 60076 international standards and GB/T 6451 industry specifications, this 10kV to 400V step down oil immersed transformer belongs to the mainstream S11, S13 and S18 low-loss transformer series, featuring fully sealed structural design and stable heavy-load operation performance. As a core industrial oil immersed electrical transformer, it is specially developed for medium and large load power distribution scenarios, solving the power supply bottleneck of small and medium-capacity transformers in industrial parks and urban functional areas.

Adopting a standard 10kV high-voltage input and 400V low-voltage output configuration, this heavy-duty oil immersed distribution transformer efficiently converts 10kV medium-voltage grid power into standard three-phase four-wire 400V low-voltage electricity that matches global industrial and civil power consumption standards. Equipped with high-purity anti-aging mineral insulating oil and mature ONAN natural cooling technology, this oil type power transformer delivers excellent continuous heat dissipation performance, ultra-low operational loss and strong environmental adaptability. Compared with large-capacity dry-type electrical transformers, the 1000kVA oil immersed power transformer features lower overall project cost, stronger short-term overload resistance and simpler field installation, making it the preferred power transformation equipment for urban grid expansion, industrial park power matching and large public infrastructure power supply projects.

Every finished 1000kva 10kv 400v oil immersed transformer undergoes comprehensive factory quality inspection, including partial discharge detection, full-load temperature rise testing, short-circuit impact resistance verification and long-term aging operation test. With optimized electromagnetic structure, balanced three-phase output and durable anti-corrosion structure, this energy-saving oil immersed electrical transformer has become one of the best-selling large-capacity distribution transformers for municipal power grid upgrading, industrial heavy-load power supply and commercial complex power distribution projects worldwide.

2. Technical Parameters

3. Core Product Features

This 1000kva 10kv 400v oil immersed electrical transformer adopts upgraded low-loss electromagnetic optimization technology and fully sealed corrugated oil tank structure, effectively improving the high energy consumption and poor heavy-load stability of traditional large-capacity transformers. It delivers reliable, energy-saving and safe operation for long-term full-load and intermittent overload working conditions in industrial and municipal power distribution systems:

3.1 Ultra-low Loss & High Energy-saving Performance

The transformer core adopts high-permeability grain-oriented cold-rolled silicon steel sheets with full oblique lap joint technology, which effectively suppresses magnetic flux leakage and greatly reduces standby no-load iron loss. The precisely wound compact pure copper coils feature low internal resistivity and uniform winding density, significantly cutting down copper loss under long-term full-load operation. As an energy-saving oil immersed distribution transformer, it effectively reduces daily power consumption and grid line loss, bringing substantial long-term energy-saving benefits for large industrial parks and urban centralized power supply systems.

3.2 Mature ONAN Oil Immersed Cooling & Sealed Insulation System

Filled with environmental-friendly non-PCB anti-aging mineral insulating oil that meets international safety standards, the 1000kVA step-down transformer adopts standard ONAN natural circulation cooling mode. The autonomous oil circulation system continuously absorbs and dissipates heat generated by heavy-load power conversion, ensuring uniform internal temperature and stable operation during 24-hour uninterrupted full-load work. The fully sealed corrugated oil tank structure completely isolates internal insulating oil from external air, moisture and dust, preventing oil oxidation, emulsification and insulation aging, and maintaining stable dielectric performance in harsh outdoor and heavy industrial environments.

3.3 Precise Voltage Regulation & Strong Anti-interference Ability

Equipped with high-precision off-load voltage tapping adjustment function within ±5% range, this three-phase electrical transformer accurately calibrates 10kV input voltage deviation caused by long-distance transmission loss and peak load fluctuation, ensuring constant and standard 400V low-voltage output. The optional Dyn11 vector group effectively balances three-phase current, suppresses grid harmonic interference and unbalanced load impact, while the Yyn0 configuration adapts to conventional balanced municipal grid scenarios. It effectively avoids power supply instability and high-value industrial equipment damage caused by voltage surge and three-phase imbalance.

3.4 Superior Environmental Adaptability & Structural Durability

The whole machine adopts thickened steel plate welding and multi-layer pickling, phosphating and electrostatic anti-corrosion spray treatment, with outstanding waterproof, dustproof, rust-proof and anti-aging capabilities. This 10kV/400V oil immersed transformer can operate stably in outdoor substation stations, heavy industrial zones, coastal humid environments and high-temperature field environments all year round. The reinforced internal core and winding structure enhances vibration resistance and strong short-circuit impact resistance, effectively reducing equipment failure rate and improving overall operational safety and stability under long-term heavy-load conditions.

3.5 Low Maintenance & High Comprehensive Cost Performance

Designed with a robust and reliable mechanical structure, this large-capacity oil immersed power transformer has no easily damaged components and requires minimal routine maintenance. The fully sealed maintenance-free design extends the replacement cycle of insulating oil, greatly reducing daily on-site inspection workload and later operational and maintenance costs. Compared with equivalent large-capacity dry-type electrical transformers, it features lower upfront procurement cost, stronger overload tolerance and wider environmental adaptability, achieving ultra-high comprehensive cost performance for heavy-load industrial and municipal power distribution projects.

3.6 Low-noise & Environmentally Friendly Safe Operation

Optimized core lamination and high-strength winding fixing technology effectively weaken operating vibration and running noise, fully meeting urban and industrial environmental protection noise standards. Equipped with standard oil level gauge, real-time temperature detector and automatic pressure relief valve, the transformer supports real-time operational status monitoring. In case of overload, overheating or internal short-circuit faults, the pressure relief device releases internal pressure timely to avoid equipment damage, ensuring safe and stable operation of the entire large-scale power distribution network.

4. Core Product Uses

As essential large-capacity power transformation equipment for 10kV heavy-load power grid systems, the 1000kva 10kv 400v Oil Immersed Transformer Electrical Transformers undertake core functions of heavy-duty voltage conversion, centralized large-scale power distribution and high-precision power quality optimization, ensuring safe, efficient and stable operation of heavy-load industrial and municipal power consumption systems:

10kV to 400V Heavy-duty Step-down Voltage Conversion: The core function is to convert 10kV medium-voltage high-capacity grid transmission power into standard 400V three-phase low-voltage power, realizing safe and precise voltage matching between high-voltage main lines and large industrial equipment and municipal centralized power consumption terminals.

Centralized Large-scale Regional Power Distribution: This oil immersed electrical transformer undertakes centralized power distribution tasks for large industrial parks, urban core business districts and large residential cluster areas, reasonably distributing high-capacity grid power according to peak and valley load demand, balancing three-phase heavy load current and reducing large-scale power transmission line loss and voltage drop.

High-precision Power Supply Quality Stabilization: By adjusting off-load tap positions, the equipment calibrates system voltage deviation caused by long-distance transmission loss and frequent peak load changes, stabilizes terminal 400V voltage within standard range, suppresses grid harmonics and three-phase unbalance, and comprehensively improves regional high-load power supply quality and operational stability.

Large Grid Fault Isolation & System Safety Protection: It effectively isolates the upper 10kV medium-voltage main grid and lower 400V heavy-load low-voltage system, preventing high-voltage fault surges from spreading to large-scale user terminals, limiting grid fault scope and reducing batch industrial equipment damage risks.

Long-term Heavy-load Continuous Power Guarantee: Relying on excellent heat dissipation performance and strong short-term overload resistance, the 1000kVA oil immersed transformer supports 24-hour uninterrupted heavy full-load operation, meeting stable power demand for large-scale industrial continuous production and urban core public infrastructure.

5. Wide Application Scenarios

With large load capacity, stable heavy-duty performance, strong environmental adaptability and high comprehensive cost performance, the 1000kva 10kv 400v Oil Immersed Transformer Electrical Transformers are widely applied in urban core power grids, large industrial bases, commercial complex power supply and large-scale new energy supporting projects worldwide:

5.1 Urban Core Power Grid Construction & Upgrading

This 1000kVA 10kV/400V oil immersed transformer is the core supporting equipment for urban new district power grid construction, old urban central area grid upgrading and economic zone centralized power distribution. It effectively improves regional power grid heavy-load carrying capacity, solves insufficient power supply capacity of traditional medium-capacity transformers, and ensures stable power supply for urban core functional areas.

5.2 Large Industrial Park & Heavy Industry Power Supply

Widely used in large manufacturing industrial parks, mechanical equipment manufacturing bases, chemical industrial zones, building material factories and continuous production light & heavy industrial clusters. The 1000kVA large load capacity fully meets 24-hour continuous power demand of large-scale production lines and heavy mechanical equipment, ensuring uninterrupted industrial production power supply.

5.3 Large Commercial & Public Infrastructure Facilities

Suitable for power distribution of urban large commercial complexes, comprehensive shopping malls, large hospital clusters, university campuses and municipal public service centers. Its low-noise, energy-saving and ultra-stable heavy-load operation will not affect public operation and service environments, fully meeting high-standard power supply requirements of large municipal public infrastructure.

5.4 Large-scale Distributed New Energy Grid Connection

Applicable for supporting power transformation and grid connection of large distributed photovoltaic power stations, centralized wind power generation zones and comprehensive new energy power supply projects. The stable heavy-load voltage conversion performance effectively balances new energy power fluctuation and peak power demand, ensuring safe grid connection and stable power transmission of large-scale new energy systems.

5.5 Key Municipal & Traffic Engineering Projects

With strong outdoor weather resistance, overload resistance and stable heavy-load performance, this oil immersed electrical transformer is widely used for fixed power guarantee of transportation hub projects, water conservancy hub projects, large municipal key projects and industrial base supporting projects, providing reliable long-term stable power support for large-scale infrastructure operation.

6. Frequently Asked Questions (FAQ)

Q1: What application scenarios are suitable for the 1000kVA 10kV/400V oil immersed transformer?

The 1000kVA large capacity is designed exclusively for heavy-load centralized power distribution scenarios where medium and small-capacity transformers cannot meet the demand. It is the mainstream choice for urban core grid upgrading, large industrial parks, commercial complexes and large public facilities with high peak power consumption and 24-hour continuous operating load. As a standard 10kV grade low-loss oil immersed electrical transformer, it adopts mature ONAN oil circulation cooling technology, with better heavy-load heat dissipation and outdoor environmental adaptability than dry-type transformers. It can run stably under long-term full-load and intermittent overload conditions, with low operational failure rate and high cost performance, fully adapting to large-scale engineering power supply needs.

Q2: What is the practical difference between Dyn11 and Yyn0 vector groups for this 1000kVA heavy-duty transformer?

Dyn11 and Yyn0 are two mainstream connection groups for large-capacity three-phase distribution transformers, matching different grid load characteristics. The Dyn11 vector group features low zero-sequence impedance and strong harmonic suppression and three-phase unbalance resistance, making it more suitable for industrial parks and new energy grid connection scenarios with complex and fluctuating loads. The Yyn0 vector group delivers ultra-stable voltage output with simple and reliable structure, which is more applicable to municipal power grids and public facility power distribution with relatively balanced load. We can customize the vector group according to customers’ on-site grid conditions and actual load types.

Q3: What routine maintenance does the 1000kva 10kv 400v oil immersed electrical transformer need?

This fully sealed large-capacity oil immersed transformer is designed for low-maintenance unattended operation. Daily maintenance only requires regular visual inspection of the oil tank sealing condition to prevent insulating oil leakage, and regular cleaning of radiator dust to ensure unobstructed heat dissipation. Long-term overload operation should be strictly avoided to prevent accelerated insulation aging. Professional teams are recommended to conduct a comprehensive insulating oil quality test and internal performance calibration every 2 to 3 years. With standardized simple maintenance, the equipment can achieve a 25-year design service life and maintain stable long-term heavy-load operation.