Notes on electrical switchgear Part -II

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Bus Bar size depends upon these factors Bus bar current – (Rated Voltage, maximum current rating of the bus bar, Fault current in kA and duration of fault) Temperature – Operating temp, max. temp during the fault, temp rise due to fault, ambient temp and max. allowable temp rise. Enclosure Detail – Installation area (indoor/ outdoor, natural ventilation), Panel size, Panel plinth level. Bus bar – Material of bus bar, arrangement (vertical or horizontal) Current density of bus bar material Material constant (K) Material strength (kg/cm2) Bus bar Support Insulator Details – Distance between insulators on Same Phase(l), Insulator Height […]