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Insulated aluminum tube bus, in essence, is the use of copper tube conductor, external insulation of a bus product.Corresponding to this are insulated aluminum tube busbars.It is called "tubular cable" in foreign countries.Insulated copper tube bus has a large current, at present up to 12000A, high mechanical strength, good insulation, wide range of application and other characteristics, so more and more customers recognized and accepted.At present, the production and application mainly focus on 0.4kv-35kV voltage grade products.There are few application examples above 35KV

Insulated aluminum tube bus features

(1) carrying capacity is big, the skin effect, low power loss, insulated copper busbar is hollow conductor, large surface area, uniform conductor surface electric current density distribution, low skin effect coefficient, relative to the multiple rectangular conductor, under the same traffic load, high voltage insulation tube type bus ac resistance small, therefore, small power loss bus.
(2) Good heat dissipation condition and low temperature rise
The hV insulated tubular bus is hollow conductor, and the inner diameter air duct of the bus can form hot air convection in the application of naturally insulated copper tubular bus in the new project, so the heat dissipation condition is better.
(3) Large section coefficient and high mechanical strength
Because the conductor adopts the tubular shape, its section coefficient is large, the mechanical strength is high, may adopt the long span arrangement, simultaneously reduces the busbar supports the number.In 50 k A short-circuit current situation, Φ 100 x 5 mm copper bus bar suspended span up to 9 meters, using the bus bracket support, busbar span can be up to 13 meters.
(4) Strong electrical insulation
Hv insulated tubular bus adopts sealed shielded insulation mode, and the ground potential of the housing is zero.The shielded insulated tubular bus has uniform electric field distribution, strong electrical insulation and good weather resistance.
(5) Strong earthquake resistance and simple installation
The hV insulated tubular bus can be fixed directly on the steel structure frame or concrete support, and the wall cover and post insulator can be removed, which has strong anti-seismic capability.Bus structure is simple, clear layout, easy installation, maintenance - free operation.
(6) The insulating material has heat resistance, aging resistance and high insulating performance
The main insulating material of Insulated aluminum tube bus adopts polytetrafluorethylene, which can work in -250℃~+340℃, has excellent electrical performance and chemical stability, small dielectric loss, flame retardant, anti-aging and service life ≥30 years.
(7) Free from environmental interference, high reliability and small maintenance workload