Unit substations provide many advantages compared to traditional approaches of stepping down utility distribution voltages. For example, the close-coupled design allows the transformer and electrical equipment to be located in close proximity to the load concentration, which minimizes the lengths of cabling and buses to reduce power losses and exposure to faults. This close-coupled design can also improve voltage regulation and service continuity.
Additionally, the unit substation design is more compact than traditional approaches by nature to help maximize footprint for revenue-generating equipment while reducing on-site labor and delivery costs. This straightforward design with simplified accessories also helps reduce maintenance costs.
Further, standardization of assembly configurations can be accomplished easily with all accessories and features meeting applicable NEMA and IEEE guidelines in order to quickly meet increasing power needs. And, by utilizing highly researched and thoroughly tested unit substation designs, you can achieve high short-circuit strength to reliably meet the demands of modern systems.