25kV transformers are important medium voltage equipment in power systems, responsible for efficient energy conversion and distribution. From industrial applications to critical infrastructure such as urban power grids and substations, 25kV transformers play an indispensable role. Evernew Transformer offers a variety of 25kV transformers, including dry type transformers, oil immersed transformers, pole type transformers, and substation transformers, designed to meet various operational needs. With major global certifications including CE, UL, GOST, and meeting Doe energy efficiency, the products are sold to many countries including the United States, Canada, North America, South America, Asia, Europe, etc. This article takes an in-depth look at 25kV transformers, detailing their types, specifications, applications, and certifications.
1. Types of 25kV Transformers
Evernew Transformer manufactures a variety of 25kV transformer models, each tailored to different environmental and load requirements. These include:
1.1 25kV Dry Type Transformers
Key Features:
- Capacity Range: From 25 kVA to 500 kVA, suitable for small to medium load applications.
- Insulation Materials: Uses eco friendly solid insulation materials, such as epoxy resin, offering excellent electrical insulation and moisture resistance.
- Cooling Method: Natural air cooling (AN) ensures quiet, reliable operation, ideal for indoor settings.
- Size & Weight: Compact and lightweight, designed for installation in confined spaces.
Applications: Dry type transformers are ideal for settings requiring high environmental standards, such as commercial buildings, factories, and urban power systems. Their compact design makes them perfect for areas with limited installation space.
1.2 25kV Oil Immersed Transformers
Key Features:
- Capacity Range: From 100 kVA to 5000 kVA, suited for high power, large load environments.
- Insulating Medium: Mineral oil serves as both a cooling and insulating agent, offering superior heat dissipation.
- Cooling System: Oil cooling ensures efficient heat exchange, even in environments with fluctuating loads.
- Rated Voltage: 25kV high voltage side, customizable low voltage side.
Applications: Oil immersed transformers are ideal for industrial zones, power distribution stations, and applications requiring consistent high-load performance. Their efficient cooling system supports stable operations under long-term heavy loads.
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1.3 25kV Pole Mounted Transformers
Key Features:
- Capacity Range: Typically from 100 kVA to 500 kVA, designed for medium-voltage power distribution.
- Insulation Type: Available in both oil immersed and dry type designs, depending on load and environmental conditions.
- External Protection: Designed with robust features to withstand harsh weather, including waterproofing and windproofing.
- Installation: Installed on utility poles or power lines, making them suitable for overhead power systems.
Applications: Pole mounted transformers are widely used in rural distribution networks and urban fringe areas, serving as a reliable power source for remote or hard-to-reach locations.
Learn More:What is a Substation Transformer
1.4 25kV Substation Transformers
Key Features:
- Capacity Range: From 500 kVA to 8000 kVA, catering to large scale power distribution needs.
- Cooling Method: Can be oil immersed or dry type, depending on the operational requirements.
- Rated Voltage: 25kV high voltage side with customizable low voltage options.
- Load Capacity: Designed to handle substantial power loads, supporting the stability of the entire substation.
Applications: Used primarily in substation transformer, these transformers provide essential voltage conversion and power distribution. They are critical for maintaining the stability and reliability of power grids.
2. Applications of 25kV Transformers
25kV transformers are used in a variety of sectors, including:
- Urban Power Distribution: Ensures smooth conversion from high-voltage electricity to low voltage suitable for residential and industrial use, maintaining reliable power supply in cities.
- Industrial & Manufacturing: Supplies power to heavy machinery and large scale industrial operations, ensuring smooth production processes in factories and manufacturing plants.
- Substations: Core components in power substations, responsible for the transformation and distribution of electricity across the grid.
- High-Rise Buildings & Commercial Complexes: Provides stable electricity to large commercial complexes, office buildings, and shopping malls, catering to high electricity demands.
3. Specifications & Technical Parameters of 25kV Transformers
Evernew Transformer offers high quality 25kV transformers, with the following typical specifications:
3.1 25kV Dry Type Transformer
- Rated Voltage: High voltage side 25kV, low voltage side 380V (customizable)
- Capacity Range: 25kVA to 500kVA
- Load Capacity: Capable of handling up to 120% load, suitable for short-term overload situations.
- Temperature Rise: Meets IEC standards, with a temperature rise under 65°C for stable long-term operation.
- Insulation Class: Class A, compliant with IEC60076 and IEEE standards.
3.2 25kV Oil Immersed Transformer
- Rated Voltage: High voltage side 25kV, low voltage side 380V/660V (customizable)
- Capacity Range: 100kVA to 5000kVA
- Load Capacity: Capable of handling up to 150% overload, ideal for continuous high load applications.
- Cooling: Mineral oil cooling system for superior heat dissipation, supporting efficient long-term operation.
- Temperature Rise: Conforms to IEC60076-2 standards for temperature rise, ensuring safe operation even at high loads.
3.3 25kV Pole Mounted Transformer
- Rated Voltage: High voltage side 25kV, low voltage side 380V/660V
- Capacity Range: 100kVA to 1000kVA
- Load Capacity: Handles varying load demands, maintaining stable performance even under high load conditions.
- Protection Rating: IP55, providing superior protection against dust and water.
Read More:What is Overhead Transformer
3.4 25kV Substation Transformer
- Rated Voltage: High voltage side 25kV, low voltage side 380V/660V
- Capacity Range: 500kVA to 5000kVA
- Load Capacity: Designed to handle large loads, ensuring stable power distribution to substations.
- Cooling: Natural or forced oil cooling systems, depending on specifications.
4. Certifications & Compliance
Evernew Transformer ensures all 25kV transformers meet stringent international standards, providing reliable and safe performance in diverse applications. Key certifications include:
- ISO9001: Quality management system certification, ensuring products meet global quality standards.
- CE Certification: Complies with European safety and environmental regulations, ensuring suitability for the European market.
- TUV Certification: Meets German and EU standards for product safety, ensuring reliable performance under high load conditions.
- UL Certification: Adheres to U.S. safety standards, ensuring safe operation in North American markets.
- DOE Energy Efficiency Certification: Meets U.S. Department of Energy (DOE) energy efficiency requirements, ensuring high operational efficiency and energy savings.
Every transformer undergoes comprehensive testing before shipment, including high-voltage testing, load testing, and temperature rise testing, guaranteeing its performance and safety under real-world conditions.
5. Pricing & Market Competitiveness
Evernew Transformer provides cost effective 25kV transformers without compromising on quality. Prices vary based on the model, capacity, and configuration, ensuring flexibility to meet diverse customer requirements. With advanced manufacturing capabilities and strong R&D support, we offer customized solutions tailored to specific operational needs.
Our production facilities and dedicated customer service team ensure competitive pricing, even for large-scale orders, while maintaining the highest standards of quality and performance.
Conclusion
As a leading transformer manufacturer in China, Evernew Transformer specializes in high quality, reliable 25kV transformers. With a strong focus on energy efficiency, environmental sustainability, and cutting-edge technology, our products meet global standards and cater to diverse markets worldwide. From dry type to oil immersed transformers, our offerings provide the flexibility, reliability, and safety needed for modern power distribution systems.
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