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30 dní na vrátenie tovaru
It presents a basic meaning for the distribution networks in united systems including city power systems and their classification. All components are inserted & their logic is illustrated. Renewable energy support is proposed while most important factors are studied. Power factor, voltage drop, power loss and load curves (with harmonics) are analyzed however, the coding systems were presented in details. Two major examples as a project style have been investigated with results. LAN, fire fighting and Telephone wiring are accounted.