Transformer bushing

The function of transformer bushing is to bow the high and low voltage leads inside the transformer to the outside of the oil tank. It not only serves as insulation for the leads to the ground, but also serves as a fixed lead. The transformer bushing is one of the current carrying components of the transformer. During the operation of the transformer, it passes through the load current for a long time. When a short circuit occurs outside the transformer, it passes through the short-circuit current. Therefore, there are the following requirements for transformer bushings: (1) they must have specified electrical strength and sufficient mechanical strength; (2) Must have good thermal stability and be able to withstand instantaneous overheating during short circuits; (3) Small in appearance, small in quality, good in sealing performance, strong in versatility, and easy to maintain.

The casing should be used according to its model and under its specified conditions, and attention should be paid to the following: (1) Ensuring the sealing of the casing is the key to achieving durability life. The sealing structure position moved by the user during installation and maintenance should be carefully restored to its original sealing state. (2) Oil level control and adjustment. Regularly observe the changes in the oil level inside the casing during operation, and adjust whether it is too high or too low.

The correct oil extraction steps are: clean the dirt at the flange oil plug, open the oil plug, use a dedicated oil nozzle, slowly screw in along the center screw hole of the oil plug, counter the plug inside and tighten it, press the sealing ring of the oil nozzle, and at this time, the transformer oil in the sleeve will flow out along the inner hole of the oil extraction nozzle; After removing the oil, follow the above process in reverse order to restore it.

With the development of China's power industry, the power supply has been increasing year by year, and power transformers are gradually moving towards high voltage and large capacity. In order to meet market demand and catch up with advanced levels at home and abroad, our company has also redesigned our existing products. The modified product, while ensuring product performance and maintaining the same assembly size and immersion length, has the characteristics of beautiful appearance, small size, and light weight.

Structure: The casing adopts oil paper capacitor core as the main insulation, cable type current carrying method, and axial compression force generated by multiple sets of pressure springs. The outer insulation of the sleeve has been changed from a conical porcelain component to a straight porcelain component, with a thinner umbrella thickness, resulting in a beautiful appearance of the product. Umbrella shaped umbrellas can still be used in both large and small sizes to meet various pollution and insulation level requirements.