Which brand of transformer is good?

It depends on what voltage level transformer you need to buy. 10KV transformer for general factory buildings. If it is a dry-type transformer, the joint venture brands ABB, Schneider and Siemens, especially ABB's Raytheon series, are absolutely reliable in quality, but the price will be slightly more expensive. In fact, the current transformer production technology is basically mature, and the quality of domestic brand transformers is basically good, but what needs to be guarded against is the problem of replacing copper with aluminum and stealing capacity. Because of the price war in the market, this has almost become a hidden rule in the industry (except for a few joint venture brands). If it is an oil-immersed transformer, the joint venture brands are ABB and Siemens, and Shenyang, which is the first in China, is fully sealed. The quality of other domestic brands is good. However, there are also cases where aluminum is used instead of copper to steal production capacity. Shopping is always a penny for a penny. There are expensive reasons and cheap reasons.