Single-Ended and Double-Ended Unit Substations — Close-Coupled MV to LV

Used and surplus close-coupled unit substation for sale — primary MV switch, step-down transformer, and secondary LV switchgear in one line-up, the single-source MV-to-utilization block for datacenter and industrial power.

Used and surplus close-coupled unit substations available for sale through Pantheon. A unit substation close-couples a primary medium-voltage section, a step-down transformer, and a secondary low-voltage switchgear or switchboard section into one factory-coordinated line-up, delivering medium-voltage service to utilization voltage in a compact footprint. A single-ended line-up carries one primary, one transformer, and one secondary bus; a double-ended line-up puts two of each on a main-tie-main bus, so either transformer can carry the whole load when a source is lost. Common at datacenter, hospital, and industrial sites, it is built to IEEE C57.12 / C37.20 with air-insulated construction and coordinated protection. New-build lead times for this class can run a year or more; used and surplus unit substations can shorten that when the ratings and configuration match. Confirm delivery timing for the specific assembly at quote. Exact rating, hours, and configuration confirmed at quote.