Why do densely packed busbars short-circuit?
Release Time:
Mar 02,2023
Dense busbar enclosures are typically made of aluminum alloy for better heat dissipation and reduced overall weight; copper bars are made of high-purity oxygen-free copper, with extremely high conductivity and a purity of over 99.7%. Accessories include connectors for connecting each dense busbar; and receptacle boxes for power extraction.
Dense busbarThe enclosure is usually an aluminum alloy shell, which can better dissipate heat and reduce the overall weight; the copper busbar is made of high-purity oxygen-free copper, with extremely high conductivity, and the purity of the copper busbar is above 99.7%. Accessories include connectors for connecting each dense busbar; and plug boxes for power supply.
Dense busbars have the advantages of large current carrying capacity, good energy saving effect, good dynamic and thermal stability, small size, good heat dissipation, and low temperature rise, and are suitable for the transmission of high-power currents.
The copper busbars of the dense busbar are wrapped with insulating medium and then closely arranged together without gaps. Due to the interphase distance, the air-type dense busbar has a relatively large volume, while the dense-type dense busbar has a significantly smaller volume, with the advantage of small size.
The voltage drop index of the dense busbar transmission line mainly depends on the resistance, capacitive reactance, and inductive reactance of the transmission line. Due to the large interphase space and the magnetic material (steel) shell, the eddy current phenomenon of ordinary dense busbars is obvious, the capacitive reactance and inductive reactance are large, the voltage drop is obvious, and the power loss is large. The compact structure of the dense busbar greatly reduces the impedance of the dense busbar system, and the non-magnetic aluminum-magnesium alloy shell avoids the occurrence of hysteresis eddy current, making the voltage drop of the entire system very small and the energy consumption very low. Low heat generation and fast heat dissipation.
Why would a dense busbar short circuit?
1. If the busbar is made of low-priced, poor-quality insulating materials, and the insulating material has pinholes or uneven thickness, it will cause the dense busbar to fail during use.
2. If the busbar copper contains impurities and has bumps, burrs, or misaligned welding, the burrs will cause the insulation layer to burst after the dense busbar has been in operation for a period of time, leading to a short circuit in the dense busbar.
3. Fire-resistant busbars should have a water spraying function. If the fire-resistant busbar does not have a water spraying function, it will short-circuit when sprayed with fire-fighting water or in other situations where it encounters water.
4. When installing the dense busbar, if garbage enters the busbar enclosure, it will cause a short circuit when it is wet.
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