Key Points for Selecting Fire-Resistant Busbar Trunking
Release Time:
Aug 02,2021
With the advent of modern engineering facilities and equipment, electricity consumption in all walks of life has increased rapidly, especially with the emergence of numerous high-rise buildings and large factories. Traditional cables, as power transmission conductors, can no longer meet the requirements of high-current transmission systems. Fire-resistant busbars, as a new type of power distribution line, have emerged, fully demonstrating their superiority in high-current transmission. At the same time, due to the adoption of new technologies and processes, the contact resistance and temperature rise of the connection branch points at both ends of the fire-resistant busbar have been greatly reduced. Fire-resistant busbars use insulating materials, improving safety and reliability, and making the entire system more perfect. Let's learn more about fire-resistant busbars
With the advent of modern engineering facilities and equipment, the electricity consumption of various industries has rapidly increased, especially with the emergence of numerous high-rise buildings and large factories. Traditional cables as power transmission conductors can no longer meet the requirements of high-current transmission systems.Fire-resistant busbarTrunking, as a new type of power distribution line, has emerged, fully demonstrating its superiority in high-current transmission. At the same time, due to the adoption of new technologies and processes, it has greatly reducedFire-resistant busbarthe contact resistance and temperature rise of the connection branch points at both ends of the trunking.Fire-resistant busbarThe trunking uses insulating materials, improving safety and reliability, making the entire system more perfect. Let's take a look atFire-resistant busbarthe key points in selecting trunking.
1. Choose qualified products from reputable companies:
Fire-resistant busbarThere are many manufacturers of trunking, with production methods often being manual. When purchasing, it is necessary to thoroughly investigate the manufacturer's production scale, technical strength, worker quality, and production environment, especially the production environment. Because if insulation processing is carried out in an unclean space, there will be some conductive particles in the insulation layer. It doesn't matter in the initial stage of operation, but over time it will cause insulation damage.
2. Pay attention to the conductor material of the busbar:
Currently, there are mainly three types: copper strips, aluminum strips, and copper-aluminum composites, with significant Price differences. In addition to purity, the mechanical properties after material bending should also be noted. It can be used for electrical equipment and meets the requirements of interface bonding strength. Different manufacturing processes result in different interface bonding strengths. Using mechanical pressure to bond copper and aluminum together can only activate interface atoms to form atomic bonds. After heat treatment diffusion, point bonding becomes surface bonding, but the diffusion depth is small. The interface bonding strength is not high. Processing under specific process conditions to fuse copper and aluminum can form a uniform interface bonding with a certain thickness of the composite layer, thereby achieving higher interface bonding strength.
3. Choose an economicalFire-resistant busbartrunking cross-section:
Generally, the busbar cross-section should be selected according to the long-term working current. And in the case of passing through a short-circuit cable, check the short-term thermal stability and dynamic stability of the busbar trunking. Due to the influence of factors such as the resistance of the conductor and the metering effect of alternating current when multiple wires are close together,Fire-resistant busbarthe trunking will generate heat when current passes through. The allowable heating temperature for copper and aluminum bare busbars during long-term operation is70℃, but when the contact surface is reliably tin-plated, the allowable temperature is increased to 85℃, and continuous heating is allowed. Due to temperature limitations, different materials and cross-sections of busbars give corresponding long-term allowable current values. When selecting the busbar cross-section,Fire-resistant busbarthe actual long-term working current of the trunking should be less than the long-term allowable current value of the selected cross-section busbar.
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