The difference between pre-installed and box-type substations

Box-type substations are divided into pre-installed or non-pre-installed (on-site installation) types. Pre-installed substations are pre-fabricated and assembled in the factory at the end of the medium-voltage distribution network, including transformers, high-voltage switchgear and control equipment, and low-voltage Switchgear and control equipment, internal wiring (cables, busbars, etc.), metering, compensation, lightning arrester and other auxiliary equipment are configured in a common shell or a group of shells, and a complete set of substations that have passed the type test according to the corresponding standards (Referred to as box-type substation or pre-installed substation. In addition to the pre-installed type, the box-type substation also includes some substations that are too large in size or poor on-site transportation conditions and cannot be transported as a whole and pre-installed. These box-type substations can be used Split design, transportation and then complete the composition on site. Or it can be modularized and complete assembly on site.