Addendum 013.9_Substation Impedances.pdf

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Hurricane Florence Recovery MILCON Package 2
Solicitation number
N4008519R9252
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This notice summarizes a federal solicitation for design-build construction services related to eight military construction projects at Marine Corps Base Camp Lejeune in North Carolina. The solicitation will result in a firm-fixed price contract to replace headquarters facilities and support buildings damaged by Hurricane Florence in 2018, including facilities for combat logistics battalions, a tank battalion, regimental headquarters, an infantry battalion, Marine expeditionary units, a transportation support battalion, and an environmental management division. The projects involve new construction of administrative, operational, and classroom buildings totaling over 300,000 square feet. The period of performance is 1,826 calendar days. The solicitation is unrestricted and will utilize a two-phase evaluation including technical, past performance, safety, project management, and price factors. The contracting office anticipates award by July 2020.

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8 Substation Impedance and Fault Currents

Point of Delivery Impedance and Faults Sub. 1 Sub. 2 Sub. FC Sub. Geiger Sub. Johnson

Z1R Resistance (pu @ 100 MVA) 0.0448 0.086 0.0171 .0844 X/R Ratio = 13 Z1X Reactance (pu @ 100 MVA) 0.3439 0.6583 0.4336 .6462 N/A Z0R Resistance (pu @ 100 MVA) 0.0408 0.083 0.0125 .0817 N/A Z0X Reactance (pu @ 100 MVA) 0.3103 0.6306 0.3958 .6206 N/A Fault Curr. 3 Ph (Amps) 12,907 6,789 10,315 6,825 2,722 Fault Curr. Ph-Gnd (Amps) 13,340 6,885 10,624 6,916 N/A 3 Ph Shrt Crkt (MVA) 297 155.1 237.3 156 N/A Trnsfmr ONAN Rating (MVA) 30 15 24 15 (3) x 1.667 Trnsfmr Impedance (%) 9.39 9.54 9.5 9.39 5.47,5.39,5.43 High Side Voltage (kV) 230 230 230 230 22.86 Bus Voltage (kV) 13.09 13.00 13.09 13.09 13.09

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