How many kinds of transformers are there? How many years will it be scrapped? What is the longest fortune telling?

Transformers can be classified in many ways, according to the convenience of your disassembly and recycling. It can be divided into electronic transformer and power transformer. Electronic transformer refers to the transformer in electronic circuit, which is small in size and wide in test range. Power transformer is a transformer in power system. According to the capacity, it is divided into super-large, large, medium and small. Generally, large transformers are expensive, large in size, long in service life (about 30 years), not easily scrapped, and high in recycling cost. With the improvement of production level, the quality of small and medium-sized transformers has also been greatly improved, and many small and medium-sized transformers with maintenance-free life of about 30 years have appeared. With people's increasing attention to energy saving and consumption reduction, the old transformers running in the power system may quit the power grid ahead of schedule due to high loss and poor reliability. Their prospects for recovery are still great.