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In electric power distribution, a bus duct (also called busway) typically uses sheet metal, welded metal [1] or cast resin to contain and isolate copper or aluminium busbars for the purpose of conducting a substantial current of electricity. It is an alternative means of conducting electricity to power cables or cable bus.
Currently, the isolated-phase bus world record current is 52,000 A, for bus manufactured by Alstom Power (since 2015 General Electric Power) and installed at the Civaux Nuclear Power Plant, in 1997. Other types of bus are: Metal-enclosed segregated phase bus; Low and high impedance bus duct; Bare flat or tubular bus bars; Non-segregated Phase ...
Earthing (safety grounding) busbars are typically bare and bolted directly onto any metal chassis of their enclosure. They may be enclosed in a metal housing, in the form of a bus duct or busway, segregated-phase bus, or isolated-phase bus. Busbars may be connected to each other and to electrical apparatus by bolting, clamping or welding.
Busbars may be aluminum tubing 3–6 inches (76–152 mm) thick, or else wires (strain bus). [33] Outdoor, above-ground substation structures include wood pole, lattice metal tower, and tubular metal structures, although other variants are available.
Enclosure comparison with normal wiring & with busbar system. Electrical busbar systems [1] (sometimes simply referred to as busbar systems) are a modular approach to electrical wiring, where instead of a standard cable wiring to every single electrical device, the electrical devices are mounted onto an adapter which is directly fitted to a current carrying busbar.
Bus duct, a sheet metal duct containing either copper or aluminium busbars (in electrical distribution system) Topics referred to by the same term This disambiguation page lists articles associated with the title Busway .
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A form of bus duct known as "plug-in bus" is used to distribute power down the length of a building; it is constructed to allow tap-off switches or motor controllers to be installed at designated places along the bus. The big advantage of this scheme is the ability to remove or add a branch circuit without removing voltage from the whole duct.
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