Specifications include, but are not limited to: 2.1.2One (1) power transformer to be used for step-down purposes within an electrical substation. 2.1.3Service Conditions:2.1.3.1Outdoor, continuous duty. 2.1.3.2Altitude: Transformer shall be suitable for operating at an altitudeof 4,300feet above sea level. For altitudes above 3,300 feet, apply Altitude Correction Factors in accordance with IEEE Std. C57.12.00, Paragraph 4.3. 2.1.3.3Ambient Conditions: 2.1.3.4Ambient temperature of cooling air shall not exceed 40°C; average temperature shall not exceed 30°C for any 24 hour period. Expected minimum temperature is -40°C. The top liquid temperature of the operating transformer shall not be lower than -20°C. Severe wind with blowing dust and snow is common at this location. 2.1.3.5Auxiliary AC power available: 120/240 Volt, single phase 2.1.3.6Auxiliary DC power available: 125Volt DC2.1.3.7Seismic Loading: Shall be in accordance with the latest IBC Code guidelines for Zone 1. 2.1.3.8Use: For interconnection between electric utility transmission system and distribution system.
