The use of plug type bus groove has the following advantages:
1, the busbar slot is convenient: the so-called plug busbar slot, is that it uses the plug way to connect the power supply of the main line to the branch, so it is very convenient to connect.
The disadvantage of prefabricated branch cable is that it needs to be customized to the factory;
The branch connection adopts the open "C" type hoop. Can the tightening force be guaranteed for a long time?
In addition, the price of each branch head is not high, so the application of prefabricated branch cable is still not wide.
Any floor needs to cut off the power supply, busbar groove without power, as long as in the case of no load, take down the busbar groove plug box can be.
But to cut off the branch power supply of the prefabricated branch cable, it is very dangerous to operate under live conditions.
2. Strong overload capacity of the busbar groove: the overload capacity of the busbar groove depends on the high working temperature of the insulating material used in the busbar groove. The overbranching of the insulating material used in the busbar groove adopts the material with the working temperature of 105℃.
The constant working temperature of the insulating material used in the cable is generally 95℃ and 105℃, so the overload capacity of the bus groove is much greater than that of the cable.
3, the bus trough can prevent overload fire: on August 27, 2000, Russia's Moscow Ostankino TV tower - the world's second, Europe's first tall building burst into flames.
The reason is caused by cable overload;
Baosteel three converter production, is also caused by cable fire.
The insulation layer and skin of ordinary cable will burn, flame retardant cable will burn under the flame, only after the flame left will not burn, fire resistant cable will not burn, but the price is expensive, only fire and other power supply is not allowed to use fire resistant cable.
The busbar casing is made of steel and will not burn. Even if the insulation material of the copper bar burns, the fire will not flee to the outside of the busbar.
4, the bus groove heat dissipation performance is good: the insulation material of the cable (core insulation and skin insulation) is both insulation material and heat insulation material, so when the power cable is laid in the bridge, it is allowed to lay up to 2 layers, the reason for the day to consider heat dissipation.
The bus groove uses air to conduct heat dissipation, and through the close contact of the steel shell, the heat is emitted, so its heat dissipation performance and cable compared, cable heat dissipation performance can be seen.
5. Busbar groove maintenance is convenient: the busbar groove almost does not need to be maintained. Daily maintenance is usually to measure the temperature rise of the shell and the core bolt, the joint temperature rise of the wire box and so on.