9. 6. 1 INVERTER SYSTEM The unit costs are derived as shown in Figure 9-23. 9. 6. 2 POWER DISTRIBUTION COSTS For preliminary ROM estimating purposes the five main feeder cables have been considered to consist of five 1, 000, 000 circular mil single conductor oil filled paper insulated cables per phase. Eac.i cable diameter is approximately 2. 192 inches and cable weight is 8, 630 pounds per 1000 feet. For the 5 main feeders a total cable length of 104 miles is required. Power distribution ROM system costs are summarized in Figure 9-24. Figure 9-24. Power Distribution ROM System Cost Figure 9-23 Inverter Unit Cost Derivation
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