The 36 kV outdoor compact unit substation is the North American–conventional form factor for distributed medium-voltage service: a single factory-built, weather-tight assembly that combines incoming 34.5 kV switchgear, a liquid-filled distribution transformer (1,000 – 10,000 kVA) and a low-voltage section, all delivered on a skid or pad ready for set-down on a prepared foundation. It replaces the older approach of bolting a pad-mounted transformer to a separate medium-voltage switchgear and low-voltage cabinet on site.
Engineered to IEEE C37.121 (unit substations), ANSI C57.12.34 (three-phase pad-mounted-equipment enclosure integrity) and IEC 62271-202 (high-voltage / low-voltage prefabricated substation), it is configured as a step-up unit for solar PV, wind, and battery-storage collector duty, or as a step-down service entrance for industrial and commercial loads. Dead-front loadbreak elbows give crews the same operator-safe switching they expect from pad-mounted apparatus; microprocessor protection, SCADA, and an FR3 natural-ester insulation option are available on request. Cold-climate, wind / seismic and corrosive-environment packages are specified per site.
