This three-phase ventilated dry-type distribution transformer pairs DOE-compliant efficiency with the oil-free, fire-safe installation that occupied buildings and indoor electrical rooms require. Ratings span 15 to 2500 kVA at 60 Hz, in both low-voltage 600 V class configurations (for example 480 V delta to 208Y/120) and medium-voltage units with primaries to the 35 kV class.
A 220 °C insulation system with standard 150 °C rise (115 °C or 80 °C optional) gives margin for continuous loading, and K-factor windings handle the harmonic content of data-center and other non-linear loads. Copper or aluminum windings, NEMA 1 / 2 indoor or 3R outdoor enclosures, and cast-resin or VPI construction are specified per project. Designed and built to UL 1561 / 1562, NEMA and CSA C9, with UL (cULus) / CSA certification available on request.
