20xx建筑學(xué)專業(yè)外文翻譯一-在線瀏覽
2025-02-08 13:24本頁面
【正文】 n flows through approaches the low pressure electric installation place grounding the thunder electric current is 20KA, when impact earth resistance =1Ω, in the grounding the electric potential elevates is 20KV, but the general indoor low pressure installment bears the striking potential most to be high is 8KV. Its result causes the low pressure electric installation insulation to be weak place is possibly perated creates the short circuit, has the fire, to damage the equipment, this is very dangerous. Therefore, gives the enough value in the design, realizes omnidirectionally, the multilevel antiradar works to the antiradar building, causes the thunder and lightning the influence to reduce to the building is building for highpressured coil, highpressured, the low pressure side each on supposes the arrester, with protects by the highpressured coil in thunder and lightning and the operation (circuit breaker movement, throws cuts big electric motor and condenser bank and so on) the overvoltage. The electronic installation are many and the important construction, installs the overvoltage protection again in the low pressure power distribution branch, does for the reserve protection, mainly uses in further suppressing after the pretage protection limit on the surplus overvoltage and the power line the overvoltage which produces by the induction or the building for low pressure coil, installs the overvoltage protector in the power source total coil in place. four, about meet dodges to meet dodges the direct truncation the lightning rod which is struck by lightning, to evade the mine belt (line), the lightning protection work, as well as serves as the metal roofing which and the steel work meets dodges and so on. In many buildings, the roofing for on person roofing, is high to the artistic request, according to the conventional procedure, clearly spreads the lightning protection work with the garden steel to do meets dodges is artistic on the influence, this standard to two kind of antiradar buildings in two, three, eight, nine section of building pointed out that with in the reinforced concrete roofing, Liang, column39。s column four corner postsThe muscle pletes the reliable electrical connection. This procedure must have the concretes fragment which regularly to the thunder stroke the possibility creates or withdraw carries on the service. five, earth body bury in the soil or the concrete foundation does drifts with the conductor about earth body the . In the practical application, the big project uses in the foundation the steel bar to make the earth body generally, and uses the union earth body, the earth resistance value to request slightly ≤ 1Ω . But in some have the basement, in half basement construction, at the construction uses the waterproofing material to construct the ledger wall to make waterproof processing. At present, uses the waterproofing material has the very good insulating property, therefore, makes the earthed pole directly to this kind of building using the foundation steel bar, had the possibility not to be able to satisfy the project docking earth resistance request, must direct from the column muscle downlead place, one week made in the closed artificial earth body and the foundation
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