Performance Requirements The widely adopted new S9 type distribution transformer typically uses 30Z140 high-permeability cold-rolled silicon steel sheets as the magnetic core material. Its saturation magnetic flux density is higher than that of amorphous alloys, and the magnetic flux density selected in the product design is usually between 1.65 and 1.75T. This is a major reason why amorphous alloy core distribution transformers have lower no-load losses than the new S9 type distribution transformers. Table 1 compares the no-load loss values of three-phase amorphous alloy core distribution transformers and new S9 type distribution transformers.
Comparison of No-Load Loss Values between Amorphous Alloy and New S9 Type Distribution Transformers
Usage Effects
Compared with the new S9 type distribution transformer, the annual energy savings of three-phase amorphous alloy core distribution transformers are considerable.
Taking an 800kVA transformer as an example, P0 is 1.05kW. Since the load loss values of the two types of distribution transformers are the same, Pk = 0. Therefore, the annual energy saving of one product can be calculated as: Ws = 8760(1.05 + 0.62 × 0) = 9198kWh. Calculations for this specification show that the energy-saving effect of the three-phase amorphous alloy core distribution transformer series is exceptional. Because the oil tank is designed with a fully sealed structure, the oil inside the transformer does not come into contact with the outside air, preventing oil oxidation, extending the product's service life, and saving users maintenance costs.