S20 oil-immersed transformer is a product independently developed by our company according to the exploration and application of new materials and new technologies and the combination of scientific and technological innovation and technological innovation, according to the optimization and creative design of the core and electromagnetic coil structure, to achieve the purpose of reducing no-load loss and noise. The noise intensity is 20% lower than the current national standard JB/T10088-2016, and the product characteristic level has reached the domestic advanced level.

S20 oil-immersed transformer is an upgraded enterprise product of power distribution equipment transformer, no-load loss and load loss are significantly reduced, and S20 transformer is close to 20%-30% power saving than S13 transformer. This requires the S20 transformer to select high-quality raw materials, first-class design solutions, and higher-precision manufacturing and processing technology.

1. Core silicon steel sheet

S20 oil-immersed transformer needs to use 80 or even 75 silicon steel sheet raw materials, S13 transformer generally uses 85 silicon steel sheet raw materials, which makes the two types of transformer core engineering cost thousands or even tens of thousands of yuan, silicon steel sheet depends on the transformer no-load loss.

2. The construction drawing design plan of the first class

Using the new design scheme, silicon steel sheet material design, the same transformer winding resistance in the material, net weight will be different, the transformer winding resistance is not the same depends on the load loss of the transformer, S20 transformer load loss is less than S13 transformer by 10%.

S20 oil-immersed transformer requires silicon steel sheet raw material model specifications

3. Advanced processing technology

While the no-load loss and load loss of S20 oil-immersed transformer decrease, higher requirements are also put forward for the transformer manufacturing and production process, including the core production process, the high-voltage ignition wire pouring steps, the difficulty of core assembly and test items.

The price of S20 oil-immersed transformer is about 40% more expensive than S13 transformer with the same volume, but the consumption of the transformer is much less in operation, in other words, although the price of S20 transformer is high, it can save customers a lot of money in the loss of water and electricity bills, and the total cost is not as good as burning money with S13 transformer.

Benefits:

1. Reduce no-load loss.

The fifth-level joints of silicon steel sheets with excellent performance are selected to improve the manufacturing process of iron core structure and reduce the processing technology index. The iron yoke is not stacked, the silicon steel sheet is not painted, and the cutting burr is kept below 0.02mm.

2. Reduce load loss.

The transmission line pulled by an oxygen-free copper rod with stronger conductivity than electrolytic nickel is selected to improve the conductivity. Appropriately adjust the current intensity, improve the insulation structure, use semi-main oil ducts, prefabricated component insulation, overall wrapping of winding, self-adhesive wire, self-adhesive paper, reduce the volume of the insulation layer, improve the winding filling factor, and reduce the winding specifications to reduce load loss.

3. Reduce the consumption of other components.

Improve the core structure: Improve the structure, control the leakage flux of the windings in the design, and adjust the ampere turn balance, so as to reduce the spurious consumption of the oil tank and other components. Use corrugated oil tank and disc radiator to improve heat dissipation efficiency.

In the production process of S20 oil-immersed transformer, high-grade trending silicon steel sheet is selected as the core raw material, and high-conductivity wire rod is used as the electromagnetic coil raw material, which can reduce the no-load loss by more than 30%, the load loss by more than 20%, and the total loss of the commodity by 25%, which can maximize the economic benefits of the environmental protection and energy-saving transformer in the operation of the power grid.

Main parameters of S20 oil-immersed transformer: