NEWS

With the sharp increase in social electricity, traditional cables can no longer meet the requirements in high-current transportation systems, and dense bus ducts in Hefei have emerged as new distribution lines. Compared with traditional cables, it fully demonstrates its superiority in high-current transportation, and at the same time uses high-quality insulating materials, enhancing overall safety and reliability. However, an increasing number of people have a shallow understanding of the safety upper limit temperature rise of the water tanks in dense bus ducts, which leads to safety risks and investment waste in projects.

Fire accidents caused by cables and wires, high and low voltage equipment, transformers, bus ducts, electrical components, etc. are widespread. Many of them caught fire due to long-term temperature rise, overheating and reaching the upper limit. The safe operation of the power supply system and energy conservation and emission reduction, as well as the upper limit temperature rise of high-density Hefei bus ducts, are indispensable technical parameters in the product evaluation of public bus ducts and all need to be taken seriously. So, what factors are related to the heating of dense bus ducts?

1. The copper content of the copper bar is low, the cross-sectional area of the conductor is insufficient, the resistivity is large, and the current-carrying density is insufficient. We often mention the copper content, cross-sectional area and resistivity of copper bars, which are indeed related to the flow capacity of bus ducts. The copper content is low and the resistivity is high. Only the size specification of the conductor can ensure the current-carrying capacity and temperature rise; otherwise, the temperature rise will be too high.

2. The core insulating materials and some products' insulating materials use resin injection or other insulating materials with poor heat dissipation. The air-type busbar structure, the heat generation and temperature resistance of some product structures and insulating materials are not good. Some products can only achieve a sealing force of 60% to 70%, which will bring serious safety risks and huge power losses to the power supply.

3. Due to poor construction, the joints are not tight and have a high resistivity, which causes the temperature of the bus duct joints to rise, and the insulating partition of the joints to heat up, which may lead to a short circuit.

Why does the compact bus duct experience a temperature rise? Through the introduction of the above content, I wonder if everyone has a clearer understanding than before? Then, when using it, one must be very careful.