200kva 1000kva 33kv 35kv Outdoor Three Phase Oil Immersed Power Transformer

200kva 1000kva 33kv 35kv Outdoor Three Phase Oil Immersed Power Transformer

1. Product Description

The 200kva 1000kva 33kv 35kv Outdoor Three Phase Oil Immersed Power Transformer is a practical medium-voltage outdoor power distribution solution tailored for global utility grid construction, industrial power supply and renewable energy power matching projects. This three-phase oil immersed power transformer covers two mainstream industrial capacities of 200kVA and 1000kVA, supporting dual 33kV and 35kV high-voltage grade operation, which fully meets the differentiated power transformation demands of light and medium outdoor load scenarios in medium-voltage power systems.

Manufactured in full compliance with IEC 60076 international power transformer standards, this outdoor high-voltage transformer adopts high-permeability cold-rolled grain-oriented silicon steel core and 100% pure copper three-phase windings. With advanced step-lap core stacking technology and vacuum full oil injection processing, the equipment effectively suppresses magnetic flux leakage, reduces no-load loss and load loss, and solves the common problems of high heat generation and unstable output of traditional medium-voltage transformers. It supports standard 50Hz and 60Hz grid frequency adaptation, and can be matched with multiple low-voltage output specifications such as 0.4kV and 11kV, realizing flexible voltage conversion for outdoor power grids.

Designed exclusively for outdoor open-air installation, this 33kV/35kV oil immersed power transformer adopts a fully sealed corrugated steel tank structure with multi-layer outdoor anti-corrosion, waterproof and anti-ultraviolet coating. The hermetically sealed design isolates internal insulating mineral oil from external dust, humid air and corrosive gas, avoiding oil aging and insulation performance degradation. Adopting reliable ONAN natural oil circulation cooling mode, the whole machine supports long-term unattended continuous operation, with stable mechanical and electrical performance. The 200kVA compact model and 1000kVA medium-capacity model form a complete graded product series, becoming a cost-effective core device for outdoor medium-voltage power distribution and grid upgrading projects.

2. Core Product Features

2.1 Dual 33kV/35kV High-Voltage Compatibility & Graded Capacity Matching

This outdoor three-phase oil immersed transformer supports both 33kV and 35kV mainstream medium-voltage grid standards, adapting to different regional high-voltage power system specifications worldwide. The 200kVA model features compact structure and low operation cost, perfectly matching light-load and stable outdoor power supply scenarios such as township branch substations and public facility power distribution. The 1000kVA medium-capacity transformer reserves sufficient load margin, coping with medium-scale industrial outdoor power supply and peak power consumption fluctuations. Dual capacity and dual voltage grade design greatly improves product versatility for diverse engineering projects.

2.2 Ultra-Low Loss Energy-Saving Structure & High Conversion Efficiency

Optimized silicon steel core and high-conductivity copper winding structure effectively reduces iron loss, copper loss and no-load current during long-term full-load operation. Compared with conventional old-generation medium-voltage transformers, this energy-saving oil immersed power transformer significantly cuts down power transmission loss, helping power stations and enterprises reduce long-term electricity operating costs. The balanced three-phase electromagnetic structure ensures stable voltage and current output under no-load, partial-load and full-load conditions, with power conversion efficiency up to 99%, meeting modern low-carbon power grid construction requirements.

2.3 Superior Outdoor Environmental Adaptability & Sealed Safety

Built for harsh open-air working environments, this 33kV/35kV outdoor power transformer undergoes professional anti-rust, rainproof, dustproof and anti-aging treatment. The fully sealed welded tank structure prevents external moisture and impurities from invading the interior, maintaining stable insulation performance of insulating oil for a long time. It can operate stably in extreme weather such as high temperature exposure, low temperature freezing, strong wind and heavy rain, and adapt to high-altitude and high-humidity complex outdoor environments. Equipped with built-in pressure relief protection and over-temperature protection devices, it can effectively avoid equipment failure caused by overpressure and overheating, improving overall operation safety.

2.4 Low Maintenance & Long Service Life

The maintenance-free fully sealed design eliminates the need for frequent oil testing, oil replacement and internal cleaning, greatly reducing daily operation and maintenance workload. The natural oil circulation passive cooling system requires no additional cooling equipment, with ultra-low operating noise and no extra energy consumption. Under standardized installation and routine inspection, the design service life of this outdoor three-phase oil immersed transformer can reach up to 30 years. Its stable structural performance and low failure rate make it ideal for long-term unattended outdoor substation operation.

3. Core Purpose

The core purpose of the 200kva 1000kva 33kv 35kv Outdoor Three Phase Oil Immersed Power Transformer is to implement safe, stable and efficient medium-voltage power conversion and outdoor power distribution. It mainly completes step-down conversion of 33kV and 35kV medium-high voltage grid power into standard usable low-voltage power, realizing reasonable power distribution and voltage stabilization for outdoor power systems.

As a key medium-voltage power transformation device for outdoor engineering, it undertakes core tasks of grid load balancing, power quality optimization and terminal power supply guarantee. It effectively solves the problems of voltage fluctuation, unbalanced three-phase load and high power loss in outdoor medium-voltage power distribution. The graded 200kVA and 1000kVA capacities flexibly adapt to different load scales, ensuring continuous, safe and reliable power supply for municipal power grids, industrial facilities and new energy outdoor power stations.

4. Application Scenarios

4.1 Urban and Rural Medium-Voltage Power Grid Upgrading

This 33kV/35kV outdoor three-phase oil immersed power transformer is widely used in urban and rural power grid renovation, township outdoor substations and grassroots power distribution hub construction. The 200kVA model is suitable for rural branch power supply, residential community supporting power distribution and small public facility power demand. The 1000kVA medium-capacity transformer is applied in town-level central substations to undertake regional centralized power distribution tasks, effectively improving the stability and coverage of grassroots medium-voltage power grids.