【正文】 情報大廈是普遍和所有類型的建設(shè)，應(yīng)建立全面的連接地面系統(tǒng)，連接地面的電阻并沒有大于 1 。 六、關(guān)于接地體 接地體 — 埋入土壤中或混凝土基礎(chǔ)中作散流用的導(dǎo)體。 建筑物為低壓進線時，在電源總進線處裝設(shè)過電壓保護器。其結(jié)果就使低壓電氣裝置絕緣較弱處可能被擊穿而造成短路，發(fā)生火災(zāi)、損壞設(shè)備，這是非常危險的。一類防雷建筑 30m 以上，二類防雷建筑 45m 以上，三類防雷建筑60m 以上，要做好防側(cè)擊雷保護，沿建筑物外墻做一周水平避雷帶，帶與帶間垂直距離≤ 6m，外墻上所有金屬欄桿，門窗均與避雷帶可靠連接，避雷帶再與引下線可靠連接。 一、二類防雷建筑低壓進線全線采用直埋地引入，將線路架空引入戶內(nèi)時不少于 15m 的一段應(yīng)換電纜 (金屬鎧裝電纜直埋地，護套電纜穿鋼管 )進戶，并在架空與電纜換接處做好避雷保護。首先，是做好等電位聯(lián)結(jié)。 二、防雷電感應(yīng)和雷電波侵入 防直擊雷的措施，一般設(shè)計人員都很明確。 Td1． 3規(guī)范中對有些建筑物僅指出大于預(yù)計雷擊次數(shù) XX 次 /每年，而歸屬二類或三類防雷建筑物。s metal pipeline and the metal peak and the bottom end and the antimine device reliable connection, the goal lies in the equipotential, because and the both sides connection causes it to form the parallel with the downlead, causes the thunder electric current news fast to enter. three, antiradar electric currents after downlead and when grounding has the high electric potential pletes against long jab thunder, the thunder electric wave invasion and the thunder and lightning to the hardware or electrical line counterattack measure induces, is not a plete antiradar design. Because, in the building mostly uses together the grounding at present, when thunder long jab in this building antimine device, the supposition 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 畢業(yè)論文 4 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, Lian