A Lightning Protection Skynet for Cable Cranes in Hydropower Stations
A technology of cable cranes and hydropower stations, which is applied in the directions of transportation and packaging, load hanging components, safety devices, etc., can solve the problems of inability to protect the cable crane from direct lightning strikes, achieve remarkable application effects, ensure equipment and personal safety, and ensure construction short cycle effect
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[0031] (1) Arrangement of lightning protection wires: Taking 4 cable cranes as an example, all 4 cable cranes are of translational type, the lifting installation condition is 25t, the pouring condition is 20t, the span of the cable crane is about 500m, and the elevations of the left and right bank platforms are 3375.00m, the altitude of the main car of the cable machine is 3386.55m, the altitude of the auxiliary car of the cable machine is 3384.872m, and the length of the tracks on both sides is about 156.00m. The lightning protection grounding overhead lightning protection wire is arranged above the 4 cable cranes, and the lightning protection covers the operating range of the 4 cable cranes.
[0032] Determine the minimum number n of lightning conductors. L=156.00m, according to the operating environment of the cable machine, the length margin δ=5m, H 0 =3375.00m, H=3384.872m, substituting into the formula, the smallest integer n can take is 6. At this time D=33.2m. The t...
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