Oil-Immersed Power Transformer

Oil Tempered Power Transformer is a power core equipment that uses insulating oil as the insulation and heat dissipation medium. With its large capacity, low loss, and high cost-effectiveness, it is widely used in the main and distribution transformer scenarios of power transmission and distribution systems.
Core Features
1. Large capacity adaptation: It can cover the demand for ultra high power transmission, with a wide capacity range, meeting the power supply requirements of the main power grid and large industrial plants.
2. Efficient heat dissipation and stability: The insulation oil has excellent thermal conductivity, and when paired with a radiator or cooler, it has high heat dissipation efficiency, low operating temperature rise, and strong long-term stability.
3. Cost efficient and durable: With mature technology, controllable manufacturing costs, long maintenance cycles, and a designed service life of over 30 years for the entire machine.
4. Strong overload capacity: Excellent short-term overload performance, able to cope with load fluctuations during peak electricity consumption periods and adapt to complex power grid conditions.
main types
Oil immersed self cooling (ONAN): relying on natural oil convection and radiator heat dissipation, suitable for small and medium capacity, load stable scenarios.
Oil immersed air-cooled (ONAF): Equipped with a fan for forced cooling, the capacity can be increased, making it suitable for areas with large load fluctuations.
Forced oil circulation type (OFAF/ODAF): driven by an oil pump to circulate and dissipate heat, suitable for large capacity and high load hub substations.
Key parameters (mainstream models)
Capacity range 50kVA~240000kVA
Rated voltage: high voltage 10kV~500kV, low voltage 0.4kV~35kV
Insulation grade A (temperature resistance of 105 ℃)
Cooling method ONAN/ONAF/OFAF/ODAF
Connection group Dyn11/YNd11 (customizable)
Typical Applications
Large scale power supply scenarios such as State Grid backbone lines, regional substations, large industrial parks, mines, metallurgical bases, etc.