Power transformers are critical electrical equipment for power transmission, accounting for 30% to 40% of grid losses. In China, transformer losses alone consume over 3% of the country's total electricity generation. Currently, some high-energy-consuming distribution transformers in operation no longer align with industry development trends, and the government has been consistently promoting energy-saving and loss-reduction measures for transformers.

        Currently, China's power distribution transformer market is fragmented, hindered by factors such as low entry barriers, uneven quality among enterprises, insufficient technological innovation, high costs, and inadequate subsidies, leading to slow adoption of energy-saving transformers.

        During the promotion of energy-saving transformer products, the higher sales price of energy-saving transformers compared to traditional ones remains a key factor affecting their widespread adoption and promotion.

        In 2020, the State Administration for Market Regulation and the Standardization Administration of China jointly issued the GB20052-2020 standard "Energy Efficiency Limits and Grades for Three-Phase Power Transformers," which came into effect on June 1, 2021. This national mandatory standard specifies the no-load and load loss energy consumption limits for power transformers with energy efficiency grades one, two, and three. The implementation of this standard signals the phase-out of certain high-energy-consuming transformers. The era of power transformers like S7, S9, and S11, which were categorized only by model without energy efficiency grades, has now come to an end. The GB20052-2020 standard sets higher energy efficiency requirements for power transformers. Currently, oil-immersed transformers, amorphous alloy transformers, and dry-type power transformers such as S20, S22, SH21, SH25, SCB14, and SCB18, corresponding to energy efficiency grades one and two, have ushered in a new era of energy-saving transformers. In recent years, new types of energy-saving transformers have been gradually promoted.