描述
智能建筑線路安裝相關(guān)要求
智能建筑自動化設(shè)備安裝中,由于建筑功能、身處的自然環(huán)境等方面的不同,所對應(yīng)的線路安裝也會存在不同程度的差異,具體情況具有比較規(guī)范的線路安裝要求,下面我們詳細(xì)得對線路安裝技術(shù)要求進(jìn)行分析,即:
接地過程中,接地電阻需要根據(jù)電子設(shè)備的不同而不同設(shè)置。
智能建筑自動化電子設(shè)備的信號接地、屏蔽接地、功率接地、邏輯接地等若是同時接在一個電極,則所對應(yīng)的電極接地電阻不應(yīng)該大于4歐,但是,如果電子設(shè)備接地、防雷接地與工頻交流接地同處于一個電極時,其所對應(yīng)的電極接地電阻不應(yīng)該大于1歐,因此,需要根據(jù)不同情況,設(shè)置不同的接地電阻,確保不同條件下,智能建筑體系能夠穩(wěn)定運行。
針對抗干擾能力比較弱的設(shè)備,需要與防雷接地分開,避免安全事故的發(fā)生。
智能建筑自動化設(shè)備安裝中,若出現(xiàn)抗干擾能力比較弱的設(shè)備,則需要將其與防雷接地的距離控制在20m左右,另外,即使設(shè)備的抗干擾能力較強,在安裝的過程中,同樣的需要將設(shè)備與防雷接地的距離控制在5m以上,這樣做的目的為:防止雷擊事故的發(fā)生。除此之外,在安裝的過程中,如果出現(xiàn)電子設(shè)備與防雷接地同時進(jìn)行的狀況,則需要先進(jìn)行埋地鎧裝電纜,這樣做的目的為:防止兩者在發(fā)生雷擊時,對電子設(shè)備造成損害。
工業(yè)電視、閉路電視等均需要采用一點接地的安裝方式,并且對電纜屏蔽,需要進(jìn)行相應(yīng)的接地處理,從而有效的避免干擾電纜對自動化設(shè)備造成一定程度的損害,另外,1MHz為分界線,對1MHz以上以及以下的電纜需要采用不同的接地方式,1MHz以上的采用多點接地,1MHz以下的采用一點接地。
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