200 kva 250kva Electricity Oil Liquid Type Transformer 35kva 750kva Transformer
1. Product Description
The Outdoor 200 kva 250kva Electricity Oil Liquid Type Transformer 35kva 750kva Transformer is a heavy-duty outdoor-grade medium-voltage power distribution device engineered for 35kV grid systems. This oil liquid type electricity transformer covers three practical mainstream capacity specifications including 200kVA, 250kVA and 750kVA, fully catering to light, medium and large outdoor power load demands for municipal grids, industrial facilities and new energy projects.
Manufactured in strict accordance with IEC 60076 international electrical standards, this 35kV outdoor oil immersed power transformer adopts high-quality cold-rolled grain-oriented silicon steel core and full pure copper winding structure. Adopting professional vacuum oil filling and sealed welding technology, the equipment takes high-purity mineral insulating oil as the core heat dissipation and insulation medium, effectively solving heat accumulation and insulation breakdown problems in long-term outdoor high-voltage operation. Different from dry-type power transformers, the oil liquid cooling system delivers more stable thermal circulation and stronger overload resistance, adapting to complex outdoor climatic conditions.
Designed exclusively for outdoor installation, this multi-capacity electricity transformer features a fully sealed anti-corrosion steel tank and multi-layer weatherproof coating, which resists rain erosion, high temperature exposure, dust accumulation and humid corrosion. It supports universal 50Hz and 60Hz global grid frequency operation, with stable 35kV medium-voltage conversion performance. The graded capacity design of 200kVA, 250kVA and 750kVA allows flexible matching for different project scales, making it a cost-effective and reliable core device for outdoor substation construction, power grid renovation and industrial outdoor power distribution.
2. Core Product Features
2.1 Multi-Capacity Graded Matching for Diverse Outdoor Loads
This outdoor oil liquid type transformer series provides three targeted capacity options to meet differentiated power supply requirements. The 200kVA model is compact and cost-effective, ideal for small-scale outdoor power distribution and stable light-load operation. The 250kVA specification is the most versatile mainstream model, perfectly matching conventional municipal and commercial outdoor power loads. The 750kVA large-capacity transformer reserves sufficient load margin, coping with high-power industrial outdoor power supply and peak power consumption surges. All capacities maintain consistent outdoor durability and power conversion stability for flexible project selection.
2.2 Superior Oil Liquid Heat Dissipation & Insulation Performance
Equipped with premium insulating mineral oil circulation system, this 35kV outdoor electricity transformer realizes efficient passive heat dissipation through natural oil convection and air heat exchange. Compared with traditional air-cooled transformers, the oil liquid cooling structure features uniform temperature distribution, lower operating temperature rise and stronger continuous load capacity. The oil-paper composite insulation system provides excellent dielectric strength, effectively isolating high-voltage current, preventing electric leakage and arc discharge, and ensuring safe operation under long-term 35kV medium-voltage working conditions.
2.3 Professional Outdoor Weather Resistance & Environmental Adaptability
Optimized for harsh open-air operating environments, this 35kV power transformer adopts fully sealed integrated welding structure and outdoor anti-rust, anti-ultraviolet and waterproof coating. It can stably operate in extreme weather including high temperature, low temperature, heavy rain, strong wind and high humidity, effectively resisting outdoor dust, corrosive gas and climatic erosion. The sealed internal structure completely isolates external moisture and impurities, avoiding insulating oil aging and insulation performance degradation, suitable for long-term unattended outdoor operation.
2.4 Low Loss Energy Saving & Low Maintenance Long Service Life
The upgraded silicon steel core and high-conductivity copper windings greatly reduce no-load loss and load loss during daily operation, delivering outstanding energy-saving effects and effectively lowering long-term grid operation and enterprise power consumption costs. Adopting standard ONAN natural cooling mode, the equipment runs with ultra-low noise and no extra energy consumption. The maintenance-free sealed design eliminates frequent oil testing and replacement work, with a design service life of up to 30 years under standardized operation, greatly reducing later-stage operation and maintenance costs.
3. Core Purpose
The core purpose of the Outdoor 200 kva 250kva Electricity Oil Liquid Type Transformer 35kva 750kva Transformer is to implement safe, stable and efficient medium-voltage power conversion and outdoor power distribution for 35kV power grid systems. It mainly completes step-down conversion of 35kV high-voltage power into standard low-voltage usable electricity, realizing stable power transmission and load balancing between medium-voltage main grids and terminal power consumption equipment.
As a dedicated outdoor oil liquid type power transformation device, it focuses on solving the pain points of ordinary transformers such as poor weather resistance, insufficient overload capacity and easy aging in open-air environments. It stabilizes outdoor grid voltage, filters power fluctuation and harmonic interference, and improves terminal power supply quality. With multi-capacity coverage, it flexibly adapts to small, medium and large outdoor power load demands, ensuring continuous, safe and reliable power supply for municipal, industrial and new energy outdoor power systems.
4. Application Scenarios
4.1 Urban & Rural 35kV Power Grid Construction and Renovation
This 35kV outdoor oil liquid type transformer is widely used in urban and rural medium-voltage power grid upgrading, grassroots outdoor substations, township centralized power supply and rural electrification projects. The 200kVA and 250kVA models perfectly meet daily stable power demand of residential areas and public facilities, while the 750kVA large-capacity version adapts to regional centralized power distribution and high-load grid supporting projects, effectively improving the stability and coverage of grassroots power grids.
4.2 Industrial Park & Factory Outdoor Power Distribution
It is the preferred power transformation equipment for industrial parks, manufacturing factories, mining bases and workshop outdoor power stations. The 750kVA high-capacity transformer can stably support long-term full-load operation of industrial production lines and high-power mechanical equipment, while the 200kVA and 250kVA specifications are suitable for factory auxiliary power supply and branch power distribution. Its strong overload resistance and weather adaptability ensure uninterrupted industrial power supply in complex outdoor working conditions.
4.3 New Energy Power Station Supporting Projects
Suitable for outdoor photovoltaic power stations, wind power generation bases and distributed new energy grid-connected projects. This oil liquid type electricity transformer can stabilize fluctuating new energy power output, complete 35kV medium-voltage voltage matching and efficient grid-connected power transmission. Its durable outdoor structure adapts to long-term open-air operation of new energy stations, providing reliable power conversion guarantee for clean energy power transmission and grid integration.
4.4 Municipal Engineering & Outdoor Public Facilities
Widely applied in highway, railway, scenic area, logistics park and municipal outdoor supporting power distribution projects. The low-noise, energy-saving and high-safety operating characteristics meet public environmental protection and power safety standards. The unattended outdoor operation capability reduces manual management pressure, stably providing standard power supply for outdoor public facilities and engineering temporary power consumption scenarios.
5. Frequently Asked Questions (FAQ)
Q1: How to select the right capacity among 200kVA, 250kVA and 750kVA outdoor oil liquid transformers?
For small township power grids, community public facilities and light-load temporary outdoor power supply, the 200kVA model offers the best cost performance. For conventional municipal outdoor substations, small commercial parks and stable medium-load industrial auxiliary power supply, the 250kVA transformer is the most widely used option with moderate load margin. The 750kVA large-capacity transformer is recommended for industrial parks, new energy power stations and regional central outdoor substations with high continuous power consumption and frequent peak loads, effectively avoiding long-term overload operation and extending equipment service life.
Q2: What advantages does oil liquid type have over dry type outdoor transformers?
This outdoor oil liquid type power transformer adopts insulating oil circulating heat dissipation, featuring better heat conduction efficiency and higher temperature resistance than dry-type transformers. It has stronger overload tolerance and more stable performance during long-term full-load operation. The fully sealed oil immersed structure is more resistant to outdoor dust, moisture and corrosive substances, with lower failure rate in harsh open-air environments. Meanwhile, it has lower manufacturing cost and longer service life under the same capacity, making it more suitable for large-scale outdoor power grid and industrial power distribution projects.
Q3: Can this 35kV outdoor oil liquid transformer adapt to extreme outdoor weather?
Yes, this series of 35kV outdoor electricity transformers is professionally optimized for harsh outdoor environments. The whole tank adopts multi-layer anti-corrosion, waterproof and anti-ultraviolet spraying process, which can resist heavy rain, snow, high temperature exposure and low temperature freezing. The fully sealed internal structure prevents moisture and dust intrusion, keeping insulating oil and internal insulation materials in stable working condition. It supports long-term unattended operation in various extreme outdoor climates, with excellent environmental adaptability and operational reliability.
