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Unformatted text preview: all machines 460V lighting 120/240V outdoor lighting 460V Power Factor .95 for lighting load Things to decide: Number of substations with number of transformers? Where to install substations? Transformers should not be loaded more than 70% (40% overload) Switch yard Lines can only be run underground and in straight lines Create two variants of methods to design the system Economic Analysis-cost of equipment-cost of losses Choose one variant after analysis of various methods Once method is chosen Fault analysis Cover fault protection (50/51 over-current)...
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- Spring '10