Transcription of Distribution Inside Large Buildings
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Distribution Inside Large Buildings
Department of Electrical Engineering Dr. Hussain Al-Mashat 1 Distribution Inside Large BuildingsIn Large Buildings the type of Distribution depends on the building type, dimension, the length of supply cables, and the loads. The Distribution system can be divided in to: The vertical supply system (rising mains). The horizontal supply ( Distribution at each floor level).In most cases a high voltage supply and transformer substation is required. Normally HV switchgear and substation transformers are installed at ground floor ( or basement ). However, often there are appliances with Large power demand installed on the top floors (converters and motors for lifts, air-conditioning equipment and electric kitchens).
Each circuit branch is served by a draw-out circuit breaker mostly by using one of these types : SF6 Circuit Breaker Vacuum Circuit breaker Minimum-Oil Circuit Breaker There are about 1150 feeders operating at 11 kV in the city Baghdad alone with a total length of 6845 km.
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