2024-01-13
The bus duct is a bus system composed of a metal plate as a protective shell, conductive bars, insulating materials and related accessories. If the bus duct passes through the floor, waterproof steps must be made first, no water pipes are allowed around the bus duct, no fire sprinklers are allowed, etc. All of these are necessary measures to prevent ordinary bus ducts from being waterproof. The bus duct has strong heat dissipation capacity and uses double-connected copper bars to effectively increase the joint contact area and greatly reduce the temperature rise of the joint.
Bus duct is suitable for power supply and distribution systems with AC three-phase four-wire and three-phase five-wire systems, frequency 50~60Hz, rated voltage up to 690V, and rated operating current 250~5000A. It is used as power supply and distribution in industries, mining, enterprises and high-rise buildings. Auxiliary equipment for equipment, especially suitable for the renovation of workshops and old enterprises. According to the shape, it is divided into straight-through busbar, L-shaped horizontal bend, L-shaped vertical bend, Z-shaped horizontal bend, Z-shaped vertical bend, T-shaped horizontal tee, T-shaped vertical tee, busbar with plug-in interface, and starting busbar .
The bus duct serves as the main line. If a short circuit occurs for some reason, the entire line will lose power. If the bus duct is short-circuited, it is basically caused by quality problems. This requires manufacturers to strictly control quality and produce qualified products to effectively avoid the occurrence of faults. If a short circuit fault occurs in the bus duct system, it can be repaired and put into use, which is more cost-effective, economical and practical than cables. Bus ducts are expensive, require a large installation area, have a long installation cycle, and are labor-intensive, so the one-time investment is large. The bus duct is small in size and consumes little energy; it uses high-conductivity copper bars, which results in low losses and high transmission efficiency.
The bus duct can be made into a plug-in bus duct with plug-in junction boxes at regular intervals, or a feed-type bus duct without a junction box in the middle. In the power supply system of high-rise buildings, power and lighting lines are often set up separately. The bus duct, as the main power supply line, is installed vertically along the wall in one or more passes in the electrical shaft. According to the insulation method, bus ducts can be divided into three types: air plug-in bus duct, densely insulated plug-in bus duct and high-strength plug-in bus duct. Because the short-circuit strength of the bus duct is closely related to the structure of the bus duct, the dense bus duct structure will be more compact.
