Standard and current situation of transformer

The specifications of medium and small-sized power transformers in China are divided into pre-specification, mid-specification and short-term specification. According to the function level, the former standard is the high loss standard, the middle standard is the high loss standard and the latter is the low loss standard. The corresponding 35kV and below (including 35kV) small and medium-sized power transformers can be divided into 4 categories: high loss, high loss, low loss and low loss. The classification standard series states that high loss 64SJ, SJ1, SJ2, SJ3, SJ4, SJ5, SJL, SJL1 replace all the high loss 73S, S1, S2, S5, SL, SL1, SL3 lower loss 86S7, SL7 sieving low loss S8, SL8, new and old S9 must be used in the future energy-saving transformers. Now s9 energy-saving products have become the main stream of the market, S11 energy-saving products are also expanding, S11 core distribution transformer has the characteristics of saving raw materials, saving energy, improving power supply quality, low noise and high mechanization.