Prefabricated substation, also known as box-type substation, is a compact complete set of power distribution equipment that integrates high-voltage switchgear, distribution transformer, low-voltage switchgear, electric energy metering equipment and reactive power compensation. Prefabricated substation, also known as box-type substation, is a compact complete set of power distribution equipment that integrates high-voltage switchgear, distribution transformer, low-voltage switchgear, electric energy metering equipment and reactive power compensation. High-voltage substations are pivotal in the safe, efficient, and secure transmission of electricity over long distances. These substations are essential system components of a power grid whose core functionalities integrate the required multi-level transformation, control, and dispatching. While substations are used for several distinct system functions, most utilize electric power transformers to adjust voltage to match varied voltage requirements along the supply chain. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and the consumer, electric power may flow through several. In simple words, an electrical substation is a facility where voltage is either stepped up or stepped down to make sure we can transmit electricity across long distances with safe distribution to the end consumer.