As a complete set of distribution equipment, the box type transformer is composed of a transformer, high voltage control equipment, and low voltage control equipment organically combined. The basic principle is to assemble the pressure starting system, armored wire, fully automatic substation system, DC system, and corresponding technical equipment in a reasonable order according to regulations, and install all components into a specific waterproof, dustproof, and rodent proof fully sealed steel box structure, thus forming a specific transformer. Box type transformers have been widely used in power engineering construction.

Box type transformers have many advantages such as small footprint, convenient operation, high application benefits, flexible combination methods, and high operational safety. They are widely used in various fields and have become an indispensable and important power equipment in today's power engineering construction.

Box type transformer is not just a transformer, it is equivalent to a small substation, belonging to the distribution station, directly providing power to users. Including high voltage room, transformer room, low voltage room; The high voltage room is the power supply side, usually with 35 kV or 10 kV incoming lines, including high voltage busbars, circuit breakers or fuses, voltage transformers, lightning arresters, etc. The transformer room is filled with transformers, which are the main equipment of the box transformer. The low voltage room has low voltage busbars, low voltage circuit breakers, metering devices, lightning arresters, etc., which lead out lines from the low voltage busbars to supply power to users.

The protection of box type transformers is specifically designed to protect transformers. It is a high-tech power automation product that integrates protection, monitoring, control, communication, and other functions. It is an ideal electrical unit for constructing intelligent box type transformers. This product has a built-in protection library consisting of more than 20 standard protection programs, which has a complete and powerful acquisition function for analog and switch values of primary equipment voltage and current (current measurement is achieved through protection CT).