The development history of box-type substation



Box-type substations are suitable for residential quarters, urban public substations, bustling cities, construction power supplies, etc. Users can choose box-type substations according to different use conditions and load levels. Since its inception, box-type substations have developed extremely rapidly, accounting for 70% of distribution transformers in developed countries in Europe and 90% in the United States. With the rapid development of urban modernization in China, the continuous renewal and transformation of urban distribution network will surely be widely used.

For box-type substations, since the late 1970s, China has imported and imitated box-type substations from France, Germany and other countries, using high and low voltage switch cabinets and transformers in structure. , The image is likened to building a house for high and low voltage switchgear and transformer. Since the 1990s, China has introduced the American box-type substation, which simplified the structure of the load switch, ring network switch and fuse into the transformer tank and immersed it in oil. The arrester also adopts oil-immersed zinc oxide arrester. The transformer cancels the oil pillow, and the fuel tank and radiator are exposed to the air. This kind of box change is called American box change, which is likened to a box hanging next to the transformer.