11Kv 1600 Kva 200Kva Oil Immersed Distribution Transformers

11Kv 1600 Kva 200Kva  Oil Immersed Distribution Transformers

1. Product Description

11Kv 1600 Kva 200Kva Oil Immersed Distribution Transformers are widely used medium and large capacity three-phase power distribution transformers designed for global 11kV medium-voltage utility grids and industrial power distribution systems. Covering two mainstream rated capacities of 200kVA and 1600kVA, these low-loss oil-filled transformers adopt mature S11 and S13 series optimized design, fully compliant with IEC 60076 international power transformer standards and local grid energy efficiency regulations. Serving as core step-down power conversion equipment for terminal power distribution networks, these 11kV oil immersed distribution transformers reliably convert 11kV medium line voltage into standard 400V low-voltage three-phase power to support industrial production, municipal infrastructure and residential centralized power loads.

Manufactured with high-performance cold-rolled grain-oriented silicon steel core and high-purity oxygen-free copper windings, these 11kV three-phase oil immersed transformers effectively reduce no-load excitation loss and operational temperature rise during long-term continuous operation. Featuring standard Dyn11 vector group configuration, the equipment balances three-phase voltage and current, suppresses grid harmonics and zero-sequence current, and solves common power quality issues such as load imbalance and voltage fluctuation in practical power distribution scenarios. Adopting fully sealed corrugated oil tank and ONAN oil natural air natural cooling technology, the internal insulating system is completely isolated from external dust, moisture and corrosive air, avoiding oil deterioration and insulation aging. The 200kVA model targets conventional medium-light load scenarios, while the 1600kVA high-capacity unit meets heavy-load and large-scale cluster power supply demands, providing flexible and cost-effective power transformation solutions for diversified 11kV grid projects.

2.Technical Parameters

3. Core Purpose

The core purpose of 11Kv 1600 Kva 200Kva Oil Immersed Distribution Transformers is to provide stable, energy-saving and safe medium-to-low voltage conversion for 11kV urban, rural and industrial power distribution networks. As key terminal power transformation equipment in medium-voltage grid systems, these oil immersed distribution transformers bridge the voltage gap between 11kV overhead transmission lines and 400V low-voltage end loads, converting high medium voltage into usable industrial and civilian three-phase power that meets global electrical safety standards.

In actual grid operation, these 11kV three-phase transformers undertake critical functions including terminal voltage stabilization, three-phase load balancing, power quality optimization and circuit safety isolation. The 200kVA model focuses on energy-saving operation for medium-light load scenarios, effectively reducing idle power consumption for small-scale power distribution points. The high-capacity 1600kVA transformer provides strong overload tolerance and continuous heavy-load operation capability, meeting large industrial cluster and municipal centralized power supply demands. Both models effectively suppress grid harmonic interference and voltage deviation, improve the overall operational efficiency of 11kV distribution grids, and reduce long-term grid operation and maintenance costs for power utilities and industrial enterprises.

4. Application Scenarios

With dual-capacity flexible matching, low-loss energy-saving performance and reliable outdoor adaptability, 11Kv 1600 Kva 200Kva Oil Immersed Distribution Transformers cover full-range medium and heavy-load power distribution scenarios of 11kV medium-voltage grids. They are widely adopted in grid renovation, industrial supporting, municipal engineering and new energy power supply projects worldwide:

• Industrial Factory Power Distribution: The 200kVA unit is suitable for small and medium-sized processing workshops, light industrial factories and small manufacturing enterprises, supporting daily stable operation of production equipment. The 1600kVA high-capacity model serves large industrial parks, heavy machinery factories and chemical enterprises, providing continuous heavy-load power guarantee for long-term industrial production.

• Urban & Rural 11kV Grid Renovation: Ideal for upgrading and capacity expansion of aging urban and rural medium-voltage power grids. Replacing outdated high-loss transformers, these modern low-energy-consumption oil immersed transformers effectively improve regional power supply capacity, stabilize terminal voltage and reduce grid transmission loss.

• Municipal Infrastructure Projects: Widely used in urban sewage treatment plants, water supply pump stations, highway service areas, railway supporting facilities and urban comprehensive substations, ensuring 24-hour stable power supply for public municipal infrastructure.

• Commercial & Residential Cluster Power Supply: The 1600kVA transformer perfectly matches high-density residential communities, large commercial complexes, shopping malls and office building clusters, solving centralized heavy-load power consumption demands. The 200kVA model adapts to suburban residential areas and small community service facilities.

• Distributed New Energy Grid Connection: Matched with medium and large-scale photovoltaic power stations, wind power generation systems and energy storage projects, completing stable voltage conversion and grid-connected power quality regulation to ensure safe and efficient grid access of new energy power.

• Mining & Field Engineering Power Supply: Adaptable for open-pit mines, field construction bases and remote engineering projects. With strong anti-interference and overload resistance, these 11kV oil immersed transformers stably support complex field power consumption environments.

5. Product Features

11Kv 1600 Kva 200Kva Oil Immersed Distribution Transformers adopt upgraded low-loss manufacturing technology and field-proven oil-immersed cooling structure. Compared with traditional old-generation transformers, this dual-capacity series has obvious advantages in energy saving, operational stability, safety and durability, fully adapting to long-term unattended operation of 11kV medium-voltage power grids:

• Dual-capacity Flexible Load Matching: Covering 200kVA medium-load and 1600kVA heavy-load specifications, this transformer series can flexibly adapt to different power consumption demands from small scattered loads to large centralized cluster loads. It avoids capacity mismatch and energy waste, meeting diversified engineering selection requirements for 11kV power distribution projects.

• Ultra-low Loss & High Energy Efficiency: Adopting high-permeability low-loss silicon steel core and high-purity copper winding, the transformers greatly reduce no-load magnetic loss and load copper loss. All energy efficiency indicators exceed conventional industry standards, effectively lowering long-term grid operational energy consumption and creating significant cost-saving benefits for power users.

• Dyn11 Balanced Three-phase Output: Standard Dyn11 vector group design realizes precise three-phase voltage and current balance, effectively inhibiting zero-sequence current and grid harmonics. It maintains stable voltage output under unbalanced load conditions, greatly improving terminal power quality and reducing electrical equipment failure rate.

• Fully Sealed Anti-aging & Leak-proof Structure: Integral welded corrugated oil tank forms a fully sealed structure, completely isolating internal core, windings and insulating oil from external humid air, dust and corrosive substances. It prevents oil aging and insulation degradation, eliminates common oil leakage faults, and extends overall service life.

• Stable ONAN Self-cooling System: Natural oil circulation and air natural heat dissipation mode ensures uniform and efficient heat dissipation. It quickly discharges internal heat generated by long-term full-load and peak-load operation, avoiding equipment overheating and ensuring continuous stable operation under variable load conditions.

• Strong Safety & Low Maintenance: Enhanced 11kV medium-voltage insulation structure provides excellent lightning protection and over-voltage resistance. The modular standardized structure simplifies daily inspection and maintenance work, with low failure rate and strong environmental adaptability, supporting long-term outdoor unattended operation.

6. FAQ (Frequently Asked Questions)

Q1: How to choose between 200kVA and 1600kVA 11kV oil immersed distribution transformers?

Capacity selection depends on actual average load, peak power demand and future expansion plans. The 200kVA 11kV oil immersed transformer is ideal for small factories, suburban residential areas and conventional medium-light load scenarios, featuring lower no-load loss and higher cost performance for stable daily operation. The 1600kVA high-capacity model is designed for heavy-load scenarios such as large industrial parks, dense residential clusters and commercial complexes, with sufficient overload margin to cope with seasonal peak power surges and reserved capacity for future load growth. Reasonable selection effectively balances power supply stability and long-term energy-saving benefits, avoiding insufficient capacity or idle energy waste.

Q2: What are the core advantages of 11kV oil immersed distribution transformers over dry-type transformers?

For outdoor 11kV medium-voltage grid distribution scenarios, oil immersed distribution transformers have outstanding practical advantages. First, the ONAN oil cooling system provides more stable heat dissipation performance under long-term full-load operation, with stronger overload resistance than dry-type transformers. Second, the fully sealed oil tank structure has better waterproof, dustproof and anti-corrosion performance, adapting to harsh outdoor weather conditions. In addition, oil immersed transformers feature lower manufacturing cost, longer service life and simpler on-site maintenance, making them more suitable for large-scale popularization in urban and rural 11kV power distribution grids compared with dry-type products limited by installation environment and heat dissipation conditions.

Q3: What routine maintenance is required for 11kV 200kVA/1600kVA oil immersed transformers?

This series of 11kV oil immersed distribution transformers has low daily maintenance thresholds and stable long-term performance. Daily routine work mainly includes visual inspection of oil tank welding seams and sealing points to check for oil leakage, deformation and surface corrosion. Operators need to regularly check insulating oil level and clarity, and clean radiator surface dust to ensure unobstructed heat dissipation. Periodic testing of winding insulation resistance and three-phase voltage balance is necessary, along with fastening high and low voltage wiring terminals. Long-term overload operation should be avoided. With standardized simple maintenance, the transformers can maintain stable working performance for more than 25 years of service life.