3 phase oil immersed transformer 750kva China Manufacturer Details

The Oil Immersed Transformer is a high-performance transformer with a more reasonable structure and better performance. The iron core is made of an electrical steel strip, and the laminations at all levels are prepared in order according to the section shape of the iron core column and iron yoke. Each lamination must be stacked directionally in strict accordance with the stacking order to reduce hysteresis loss and eddy current loss. Therefore, the performance is further improved, the loss is reduced, the noise is reduced, the three items are balanced, and the third harmonic component is reduced. Step down transformer is commonly used. This product has excellent adaptability for both urban and rural environments, power grid transformation, industrial and mining enterprises, as well as for combined transformers and prefabricated transformer substations.

Oil-immersed transformers use oil as the main insulation means transformers and rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, and forced oil circulation. The main components of the transformer are an iron core, winding, oil tank, conservator, respirator, Pressure Relief Valve, radiator, insulating sleeve, Tap Changer, Gas Relay, thermometer, etc.

The noise of an oil-immersed transformer is low because the oil can penetrate the silicon steel sheets of an oil-immersed transformer for a long time, and the transformer oil has an elastic buffer effect.

A phase oil immersed transformer adopts a filled sealed corrugated oil tank shell, which is a permanently sealed oil tank with its elasticity to adapt to oil expansion. Oil immersed transformer has been widely used in various power distribution equipment.

Compared with the ordinary oil-immersed transformer, the oil conservator is canceled for the fully sealed transformer. The corrugated sheet in the corrugated tank is elastic and can automatically adjust and compensate for changes in the amount of oil. The transformer is isolated from the air, preventing and slowing down the oil deterioration and insulation aging, enhancing the operation reliability, and free of maintenance during normal operation.

The transformer core is made of high-quality cold-rolled silicon steel sheet, which effectively reduces no-load loss and no-load current. At the same time, the design of the core ensures its airtightness, thus reducing the noise level during operation.

The transformer is mainly composed of an iron core, winding, oil tank, insulating sleeve, tap changer, etc.

a. Low voltage winding of oil-immersed transformer adopts a cylindrical structure; High voltage winding adopts multi-layer cylindrical structure to balance the ampere turn distribution of the winding, with small magnetic leakage, high mechanical strength, and strong short-circuit resistance.

b. The iron core and winding adopt fastening measures, respectively, and the fastening parts, such as the height and low-voltage lead, are equipped with locknuts, which can withstand the shock of transportation.

c. The coil and iron core are vacuum dried, and the transformer oil is vacuum filtered and injected to minimize the moisture inside the transformer.

d. The tank design uses a corrugated sheet with respiratory function, which can effectively compensate for the oil volume change caused by the temperature change. Therefore, the product has no oil conservator, obviously reducing the height of the transformer.

e. Because the corrugated sheet replaces the oil reservoir, the transformer oil is isolated from the outside world, effectively preventing oxygen and moisture from entering, resulting in decreased insulation performance.