Application of oil strut belt in transformers

Oil-immersed transformers use transformer oil as a cooling and insulating medium. During operation, they generate a lot of heat and need to maintain good insulation performance to ensure safe and stable operation. As an important component inside the transformer, the reasonable design and installation of the oil strut belts have a vital impact on the performance and service life of the transformer. The oil strut belts are usually installed between the windings of the transformer, between the windings and the core, etc., and have many effects on the operating performance of the transformer.

The oil strut belt is made of rectangular support strips and diamond-shaped insulation paper glued with special adhesives and is widely used in oil-immersed transformers. This design avoids the weaknesses of traditional corrugated cardboard, such as easy deformation and displacement, making the oil strut belt more firmly combined with the coil and having better mechanical and electrical properties.

Application of oil strut belts in transformers

1. Constructing oil flow channels

When the oil-immersed transformer is in operation, the windings and the core will generate heat due to current flow and hysteresis loss. The oil strut belts form regular oil flow channels inside the transformer, allowing the transformer oil to flow smoothly between the windings and between the windings and the core. When the transformer oil flows through the heat-generating components, it absorbs heat and then takes the heat to the radiator for dissipation. For example, in some large oil-immersed transformers, the design of the oil strut belt allows the transformer oil to flow through the windings at a higher flow rate, which greatly improves the heat dissipation efficiency and ensures that the transformer can maintain a normal temperature range under rated load.

2. Fix the winding position

In oil-immersed transformers, the winding needs to maintain a stable position to ensure the reliability of electrical connection and the accuracy of electromagnetic coupling. The oil strut belts provide mechanical support for the windings, which can fix the position of the windings and prevent the windings from deformation or displacement during transportation, installation and operation. For example, in the axial and radial directions of the transformer, the oil strut belts can play a positioning and supporting role to ensure that the windings can maintain normal shape and size under various working conditions.

3. Electrical insulation isolation

Oil strut belts are usually made of materials with good insulation properties, such as insulating papaerboard. In oil-immersed transformers, they can effectively isolate the electrical connections between windings and between windings and cores to prevent electrical faults such as short circuits. For example, in high-voltage oil-immersed transformers, the voltage difference between windings is large. As an insulation barrier, the oil strut belts are subjected to high voltages, and their insulation performance is directly related to the safe operation of the transformer. High-quality oil strut belts can ensure that reliable insulation performance is always maintained during long-term operation to avoid accidents caused by insulation breakdown.

The oil strut belts play many roles in oil-immersed transformers, such as heat dissipation, insulation, and structural support. They play an important role in improving the operational reliability of transformers and optimizing transformer design. In the design, manufacturing, and maintenance of oil-immersed transformers, fully pay attention to the selection and installation of oil strut belts to ensure that their performance meets the requirements, so as to ensure the safe and stable operation of the transformer and provide strong support for the reliable power supply of the power system.