The selection of busway is usually considered comprehensively from the following aspects:
Fire protection requirements, the thermal insulation material should be flame-retardant and heat-resistant, not release toxic gases at high temperatures, and prevent the chimney effect on the structure. Densely insulated bus ducts should be given priority. Each unit in a trough enclosure is required if the air insulated type is selected. Set up fire barriers; for particularly important places, in order to ensure the maintenance of emergency power supply in case of fire, refractory tanks should be selected.
As for the installation location, the protection level of the tank shell should be considered first, followed by the influence of the building structure on the shape of the trunking, the form of the mounting bracket and the span.
Indoor dedicated workplaces, such as large-capacity substations, can use IP30 busbars to improve heat dissipation.
For indoor humid places or with splash-proof requirements, in order to ensure that it can still work normally when splashed, a busway with a protection level of not lower than IP54 should be selected.
Outdoors or places with special requirements, such as anti-spray water, anti-wave, anti-corrosion, can use resin busbar for separate insulation.
For large-span places, the shell-reinforced busway should be used; the rated current should be comprehensively considered from the aspects of technical performance, heat dissipation effect, and price. At present, aluminum alloy casings with good heat dissipation performance and low energy consumption are mostly used in the market.
