Specifications include, but are not limited to: one 40 MVA 161-13kV Transformer.; A. Number of units: One; B. Three phase X; C. MVA Ratings 161 and 13 kV windings: MVA (self-cooled) 40.0/44.8 at 55/65 degrees C by resistance.; MVA (1st stage cooling) 53.3/59.7 at 55/65 degrees C by resistance.; MVA (2nd stage cooling) 66.6/74.6 at 55/65 degrees C by resistance.; D. Supplemental cooling: Fans-ONAN/ONAF/ONAF; E. The hottest spot temperature rise for the 55 degrees C average temperature rise ratings shall not exceed 65 degrees C. The hottest spot temperature rise for the 65 degrees C average temperature rise ratings shall not exceed 80 degrees C; F. 1. Voltage rating 161.7 –13.8/7.97 kV, 60 Hertz. ; G. Design Impedance: Based on high voltage BIL and low voltage rating at self cooled (ONAN) rating per IEEE C57.12.10 Table 3 latest revision Z= 10.5 %; H. All electrical characteristics and mechanical features not herein specified shall be in accordance with applicable ANSI and NEMA standards.; A. Elevation above sea level is less than 3,300 feet (standard).; B. Winding connections: 1. High voltage winding rated 161.7 kV and connected Delta; 2. Low voltage winding rated 13.8/7.97 kV and connected Wye; C. Auxiliary supply voltages: 1. 120/240 volts 3 wire 1 phase 60 Hertz AC will be supplied for all motors and heaters.; 2. 125 volts DC will be used for alarms and control circuits.
