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2018

Laminated insulation soft busbar (flexible busbar)

The insulated soft busbar,also known as laminated insulated soft busbar and flexible busbar,is made of multi-layer corona proof flat thin copper sheet conductors superimposed,and the outer layer is extruded to cover the insulation layer.
1、Structural composition
1.Conductor
The conductor of insulated flexible busbar adopts T2 soft copper strip,which can be divided into bare copper and tinned copper.Copper strip specifications are 15.5×0.8，20×1，24×1，32×1，40×1，50×1，63×1，80×1，100×1.The number of laminations is 2 to 12.
2.Insulating layer
At present,the insulation layer of insulated soft busbar has two materials:special polyvinyl chloride(PVC)and thermoplastic elastomer(TPE).TPE has the characteristics of low smoke and halogen-free.
2、Production standard
There is no special standard for insulated flexible busbar in the world.The United States borrows UL758 electronic wire standard for production certification,and Xi'an Longyuan first began to manufacture it with reference to gb/t5023 insulated cable standard and UL758 electronic wire standard.
3、Product characteristics of insulated soft busbar:
1.Easy to process and shape
Because the copper conductor can slide freely in the insulating layer,the insulating soft busbar has infinite bending and torsion characteristics.The wide thickness ratio of copper strip varies greatly,which makes the soft busbar easy to bend in the thickness direction,but has high rigidity in the width direction,so that the insulated soft busbar can bend out any spatial configuration by hand or with simple tools,which is convenient for installation and wiring.
2.High current carrying capacity
Due to the skin effect,when passing through AC,the current inside the conductor is actually very small,and the current is concentrated in a thin layer near the outer surface of the conductor.The multilayer flat conductor structure of insulated soft busbar makes the same conductor cross-sectional area can carry more passing current.Thus,the amount of conductor material is reduced,which not only reduces the weight,but also saves the layout space.
The following is a comparison of the required sections of insulated flexible busbar and ordinary circular cable under three current carrying capacities:
Current carrying capacity insulated soft busbar cross-sectional area circular cable cross-sectional area
250A 40mm2 95 mm2
630A 160 mm2 300 mm2
1000A 300 mm2 555 mm2
3.Convenient installation
After the insulating soft busbar is bent and punched,the spatial shape of the structure can not only avoid the interference area,but also easily return to the original shape after bending during installation.The contact surface can be directly connected with the terminal and slightly fixed,eliminating the complex connection and fixation of traditional cables and busbar.
4、Application of insulated soft busbar
Due to the excellent characteristics of insulated soft busbar,it has become the first choice for electrical wiring.It will gradually replace the application of cable in electrical wiring,and the hard busbar of non main structure will also be gradually replaced by soft busbar.