Unrivaled Reliability & Performance: Advanced Oil-Cooled Power Transformers
The Backbone of Modern Grids and Industrial Operations
Our Oil-Cooled Power Transformers are meticulously engineered to be the robust and highly efficient cornerstone of any critical power infrastructure. Designed for both stepping up voltage at generation sites and stepping down for transmission and distribution, these transformers ensure stable, reliable, and high-quality power delivery across diverse applications. Leveraging the superior insulating and cooling properties of dielectric oil, our transformers are built to endure the most demanding operational conditions, offering unmatched longevity and performance.
Key Features
Premium Core Material: Utilizes high-grade, grain-oriented silicon steel laminations with advanced stacking techniques to minimize core losses (hysteresis and eddy current) and ensure optimal magnetic performance.
Robust Windings: Precision-wound copper or aluminum conductors, fully insulated and designed for excellent short-circuit withstand capabilities. Configurations available for both high-voltage (HV) and low-voltage (LV) sides.
Superior Oil-Cooling System:
Dielectric Fluid: Filled with high-quality mineral oil or ester fluids (natural or synthetic) for excellent heat dissipation and dielectric strength, ensuring internal components operate within optimal temperature ranges.
Cooling Methods: Available in various configurations including:
ONAN (Oil Natural Air Natural): For smaller to medium ratings, relying on natural convection for both oil and air.
ONAF (Oil Natural Air Forced): Enhances cooling with forced air circulation via fans.
OFAF (Oil Forced Air Forced): Employs pumps for oil circulation and fans for forced air, ideal for higher ratings.
ODAF (Oil Directed Air Forced): Directs oil flow to windings for highly efficient cooling in large units.
Radiators/Cooling Fins: Optimally designed to maximize heat exchange surface area.
Durable Tank Construction: Fabricated from high-strength steel, meticulously welded, and treated with multi-layer corrosion-resistant coatings to withstand harsh environmental conditions and ensure a leak-proof enclosure.
Advanced Tap Changer:
On-Load Tap Changer (OLTC): Allows voltage regulation without interrupting power supply, crucial for maintaining stable grid voltage.
Off-Circuit Tap Changer (DETC): Provides voltage adjustment when the transformer is de-energized.
Conservator Tank: Located above the main tank, it allows for oil expansion and contraction due due to temperature variations, preventing air and moisture ingress into the main tank.
High-Voltage Bushings: Manufactured from porcelain or composite materials, designed for excellent insulation and mechanical strength, suitable for various voltage levels.
Digital Monitoring Systems (Optional): Integrated RTUs for remote monitoring of vital parameters, fault diagnostics, and predictive maintenance.
Benefits
Exceptional Heat Dissipation: Oil provides superior thermal conductivity compared to air, effectively dissipating heat from the core and windings, crucial for high-power applications.
Enhanced Dielectric Strength: The transformer oil acts as an excellent electrical insulator, preventing arcing and ensuring reliable operation at high voltages.
Extended Lifespan: Efficient cooling and insulation reduce thermal and electrical stress on components, leading to a significantly longer operational life and lower total cost of ownership.
High Efficiency & Low Losses: Optimized designs minimize no-load and load losses, contributing to reduced energy consumption and environmental impact.
Robustness & Durability: Engineered to withstand mechanical stresses, electrical transients, and demanding environmental conditions (temperature extremes, humidity, pollution).
Proven Reliability: Oil-cooled technology is a mature and extensively proven solution, offering unparalleled dependability in mission-critical applications.
Scalability: Available in a vast range of power ratings and voltage classes to suit diverse project requirements, from industrial step-down to major grid interconnections.
Applications
Our Oil-Cooled Power Transformers are ideal for a wide spectrum of demanding power applications, including:
Power Generation Plants: Step-up transformers for connecting generators to the transmission grid (Hydroelectric, Thermal, Nuclear, Gas).
Transmission Substations: High-voltage step-up and step-down applications for long-distance power transfer.
Distribution Networks: Step-down transformers to bring power to industrial, commercial, and residential areas.
Industrial Plants: Powering heavy machinery, arc furnaces, rolling mills, and other high-demand industrial processes.
Renewable Energy Facilities: Essential for integrating wind farms, solar power plants, and battery energy storage systems into the grid.
Mining & Metallurgy: Robust solutions for demanding power requirements in harsh environments.
Railways & Transportation: Providing reliable power for electric traction systems.
Data Centers: Ensuring stable and continuous power supply for critical IT infrastructure.
Technical Specifications (General Range)
Parameter
Range/Description
Power Rating
1 MVA up to 1000+ MVA
Voltage Class
Up to 765 kV (HV) / Custom (LV)
Frequency
50 Hz / 60 Hz
Cooling Method
ONAN, ONAF, OFAF, ODAF (specified per rating)
Insulation Level
Up to BIL 1950 kV (based on voltage class)
Vector Group
Dyn11, YNd1, YNyn0, etc. (customizable)
Impedance Voltage
Customizable to project requirements
Tap Changer Type
On-Load Tap Changer (OLTC) / Off-Circuit Tap Changer (DETC)
No-Load Losses
Minimized using high-grade core steel
Load Losses
Minimized using optimized winding design
Temperature Rise
Compliant with international standards (e.g., 65°C winding, 60°C oil)
Standards Compliance
IEC 60076, ANSI/IEEE C57, NEMA, IS, CSA (and others as required)
We understand that every power project has unique demands. Our team of experienced engineers works closely with clients to design and manufacture bespoke Oil-Cooled Power Transformers tailored to specific voltage requirements, power ratings, impedance values, cooling configurations, and environmental conditions.
