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        Energy saving, light weight, high strength, corrosion principle of material mechanics Convex concave corrugated structure, improve the mechanical strength, decrease the thickness of the steel plate used, reduce weight to surpass the cooling performance, to achieve energy saving design the structure of the upper and lower cold and hot air exchange, combined with the overall radiating surface increases, a greater extent make on bridge in the heat generated by the cable conductor is fully distributed, reduces the power loss in the line resistance and, improve the utilization rate of power to achieve the effect of energy saving. Energy saving tray compared with ordinary tray, power saving rate of 2.05%, compared with the ordinary ladder, power saving rate is 0.95%.