Comparison of busbar trunking performance
Release Time:
Nov 15,2022
Busbars have excellent heat dissipation performance. The insulating material of the cable (core insulation and sheath insulation) is both an insulating material and a heat-insulating material. Therefore, when laying power cables in cable trays, due to heat dissipation considerations, two layers can be laid at most. The busbar uses air conduction for heat dissipation, and the heat is dissipated through close contact with the steel shell, so its heat dissipation performance is comparable to that of cables. Busbars require almost no maintenance. Routine maintenance usually involves measuring the temperature rise of the shell core bolts and the cable inlet box joints, etc. If 4.8-grade core bolts are used, they need to be tightened regularly; if 8.8-grade high-strength bolts are used, then...
Busbar trunkingIt has good heat dissipation performance. The insulation material of the cable (core insulation and sheath insulation) is both an insulation material and a heat insulation material. Therefore, when laying power lines in the cable tray, due to heat dissipation considerations, two layers can be laid more often.Busbar trunkingIt uses air conduction for heat dissipation, and through close contact with the steel shell, the heat is dissipated. Therefore, its heat dissipation performance is consistent with that of the cable.
Busbar trunkingAlmost no maintenance is required. Daily maintenance usually involves measuring the temperature rise of the shell core bolts and the connector temperature rise of the cable inlet box. If the core bolt is usedGrade 4.8, it needs to be tightened regularly. If it is a grade 8.8 high-strength bolt, it does not need to be hardened regularly. Cables are easily worn, aged, and have a short service life, so they need regular inspection, maintenance, and even replacement.
Currently, the larger cross-sectional area of the cable can only be1000MM, with a rated current of 1600A. However, this large-size cable is rarely used in actual engineering due to its large size and weight. In engineering, the distribution generally uses cables with specifications of 400MM and below, requiring multiple cables to supply power simultaneously.Busbar trunkingThe larger rated current can reach6300A, and its powerful carrying capacity is unmatched by cables.Busbar trunkingStrong overload capacity.
Depending on the working temperature of the insulation material used, the insulation material used in the busbar is supported by overload at a working temperature of105℃ material overload support. Radiation cross-linked flame-retardant winding tape and radiation cross-linked polyolefin heat shrink tubing with a working temperature above 140℃ have been developed. The insulation material used for cables is generally 95℃ and 105℃, soBusbar trunkingthe overload capacity is far greater than that of the cable.Busbar trunkingConvenient connection. The so-called plug-inBusbar trunkingis to distribute the main power to the branch lines in a plug-in way. Every few meters, there is a plug-in box, so the connection is very convenient. But it requires on-site connection of cables, and the reliability is poor. Even prefabricated branch cables have obvious shortcomings, mainly because they need to be customized to the factory.
The branch connection method uses an open“C” type ring. In addition to the high Price of each branch cable head, the application of prefabricated branch cables is not yet widespread. Any floor requires power to be cut off,Busbar trunkingNo power outage is required, as long as the load is unloaded, theBusbar trunkingsocket box can be removed. However, cutting off the branch power supply of the prefabricated branch cable is very dangerous.
The insulation layer and skin of ordinary cables will burn, and flame-retardant cables will also burn under flames. Only after the flame leaves will it not burn. Fire-resistant cables do not burn, but they are expensive.Busbar trunkingThe shell is metallic and will not burn, even if the copper insulation material burns, the flame will notBusbar trunkingspread outwards.
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