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This image is a manufacturer's nameplate for an ABB Class ONAN 60-Hertz three-phase distribution transformer. The unit was manufactured in Jefferson City, Missouri in July 2011 and carries serial number 11JC573270001.

The transformer is rated at 1000/1120 KVA with a continuous rise temperature of 55.65 degrees Celsius. High voltage specifications are 4160 GRDY/2400 volts at 60 KV billing, with low voltage of 480Y/277 volts at 30 KV billing. The transformer has an impedance of 5.80 percent and is filled with mineral oil containing no detectable PCB levels. The unit includes tap changer ratings with five voltage settings ranging from 4370 volts (132.12 amps) at tap 1 to 3950 volts (146.17 amps) at tap 5. Approximate weights are provided for core and oils (2615 lbs), oil only (2468 lbs), case (2383 lbs), and total weight (7466 lbs). The transformer features a stainless steel base and cabinet with a neutral disconnect and phasor diagram indicating three-phase distribution configuration. Operating instructions reference instruction book 46-860-1 available at www.abbdt.ucom, and the nameplate includes a caution that the tank must be solidly grounded before operation.