The 1250 kVA power transformer is a critical component in medium-voltage power distribution systems, widely used across industrial facilities, commercial complexes, data centers, and infrastructure projects. With its high power capacity and stable performance, this transformer ensures efficient voltage regulation, power transmission, and energy reliability.
What is a 1250 kVA Transformer?
A 1250 kVA transformer is an electrical device designed to step up or step down voltage levels with a rated capacity of 1250 kilovolt-amperes (kVA). It can be dry-type or oil-immersed depending on application needs, and is commonly deployed in power networks operating between 10kV and 35kV.
Key Specifications
Typical technical parameters of a 1250 kVA transformer include:
Rated Capacity: 1250 kVA
Primary Voltage: 10kV / 11kV / 13.8kV / 20kV / 35kV
Secondary Voltage: 400V / 415V / 480V
Cooling Method: AN/AF (Air Natural/Air Forced for dry type) or ONAN/ONAF (Oil Natural Air Natural/Oil Natural Air Forced for oil type)
Frequency: 50Hz or 60Hz
Vector Group: Dyn11 or Yyn0 (based on requirements)
Impedance Voltage: Usually between 6% and 8%
Insulation Class: F or H for dry type; A for oil immersed
Applications of 1250 kVA Transformers
Due to its high capacity and versatility, the 1250 kVA transformer is widely used in:
Industrial manufacturing plants requiring high-load energy distribution
Commercial buildings such as malls, hospitals, and hotels
Renewable energy stations including solar farms and wind power sites
Transportation infrastructure like subways and airports
Data centers with high energy reliability demands
Dry-Type vs. Oil-Immersed 1250 kVA Transformer
Choosing between dry-type and oil-immersed transformers depends on the operating environment and safety requirements.
Dry-Type Transformer: Safer for indoor use, lower fire risk, easy maintenance, eco-friendly
Oil-Immersed Transformer: Higher overload capacity, better heat dissipation, suitable for outdoor or remote installations
Installation and Maintenance Tips
To ensure optimal performance of a 1250 kVA transformer, follow these guidelines:
Ensure proper ventilation and cooling
Maintain clearance distance for safety and heat dissipation
Regularly inspect insulation, connections, and grounding
Monitor load balance and voltage levels
Follow the manufacturer's service intervals and testing protocols
Efficiency and Energy Saving
Modern 1250 kVA transformers are designed to reduce core losses and copper losses through improved materials and engineering. High-efficiency designs contribute to lower operating costs and environmental impact, especially in energy-intensive applications.
A 1250 kVA transformer is a high-capacity and highly reliable solution for medium-voltage power distribution. Whether you choose a dry-type or oil-immersed model, the key lies in understanding your load requirements, installation environment, and long-term operational goals.
If you're looking for a trusted manufacturer or need technical consultation on selecting the right 1250 kVA transformer, contact our team for expert support and competitive pricing.
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