配電系統應滿足信息機房的(de)使用(yong)要求，保證供電可靠性(xing)和靈活性(xing)，保證人身安全，便于施工、維修和管理，且必須做到技術先進、經(jing)濟合理。照明系統符合國家(jia)有關規定。

1.設計原則

技(ji)術先(xian)進(jin)，可靠(kao)性(xing)高(gao):集成管理，靈活性(xing)好;系(xi)統安全(quan)，保密性(xing)強(qiang);擴(kuo)展容易，維護方便;經濟(ji)實(shi)用，合理超前(qian)。

2.供電電源

計算(suan)機(ji)機(ji)房供(gong)電(dian)(dian)采用380/220V電(dian)(dian)壓、50Hz頻率和三相五線制(即TN-S系統(tong))的(de)配線方式。因(yin)機(ji)房設(she)(she)(she)備(bei)分(fen)計算(suan)機(ji)設(she)(she)(she)備(bei)和計算(suan)機(ji)輔助(zhu)設(she)(she)(she)備(bei)，這(zhe)兩種(zhong)設(she)(she)(she)備(bei)對(dui)供(gong)電(dian)(dian)電(dian)(dian)源(yuan)有不(bu)同(tong)的(de)要求，所以采用兩種(zhong)不(bu)同(tong)的(de)電(dian)(dian)源(yuan)供(gong)電(dian)(dian)，即一種(zhong)為(wei)普通(tong)電(dian)(dian)源(yuan)，一種(zhong)為(wei)不(bu)間(jian)斷電(dian)(dian)源(yuan)。普通(tong)電(dian)(dian)源(yuan)給計算(suan)機(ji)輔助(zhu)設(she)(she)(she)備(bei)供(gong)電(dian)(dian)，如空調、照明(ming)、維修插座、輔助(zhu)插座等(deng);不(bu)間(jian)斷電(dian)(dian)源(yuan)給計算(suan)機(ji)設(she)(she)(she)備(bei)供(gong)電(dian)(dian)，如服務器(qi)、主機(ji)、終端(duan)、路由器(qi)、交換機(ji)、防火墻(qiang)等(deng)設(she)(she)(she)備(bei)。

兩種(zhong)電(dian)源(yuan)(yuan)引入不(bu)同的配電(dian)箱(xiang)(xiang)(xiang)，即安裝在主機房內(nei)的普通(tong)電(dian)源(yuan)(yuan)配電(dian)箱(xiang)(xiang)(xiang)和UPS電(dian)源(yuan)(yuan)配電(dian)箱(xiang)(xiang)(xiang)內(nei)，再由配電(dian)箱(xiang)(xiang)(xiang)分別送(song)給計算機設備(bei)和計算機輔助設備(bei)。

3.控制和保(bao)護設備

為了確(que)保設備(bei)能(neng)安全可靠地(di)運(yun)轉、電(dian)源準確(que)靈敏(min)通電(dian)和斷電(dian)，電(dian)源控制及保護(hu)設備(bei)應選用可靠靈敏(min)的(de)空(kong)氣開關(部分帶漏(lou)(lou)電(dian)保護(hu))。視設備(bei)情(qing)況(kuang)不同，具有過載保護(hu)、短路保護(hu)和漏(lou)(lou)電(dian)保護(hu)功能(neng)，以確(que)保電(dian)源控制和設備(bei)的(de)安全。

4.計算機專用地

計算(suan)機系(xi)統(tong)的(de)直(zhi)流地(di)(di)(di)又稱(cheng)邏輯地(di)(di)(di)。為(wei)了使計算(suan)機正常(chang)工作，直(zhi)流地(di)(di)(di)是(shi)零電(dian)位參考點，但不(bu)(bu)一定是(shi)大地(di)(di)(di)電(dian)位。如果把(ba)該(gai)接(jie)地(di)(di)(di)系(xi)統(tong)經低阻通路接(jie)至大地(di)(di)(di)，則稱(cheng)為(wei)接(jie)大地(di)(di)(di)。如該(gai)接(jie)地(di)(di)(di)系(xi)統(tong)不(bu)(bu)與大地(di)(di)(di)相接(jie)，而是(shi)與大地(di)(di)(di)絕(jue)緣，則稱(cheng)為(wei)直(zhi)流地(di)(di)(di)懸浮。通常(chang)經過(guo)適當(dang)的(de)處(chu)理后再(zai)接(jie)地(di)(di)(di)，即(ji)采用串聯(lian)接(jie)地(di)(di)(di)-多點接(jie)地(di)(di)(di)、并聯(lian)接(jie)地(di)(di)(di)-單(dan)點接(jie)地(di)(di)(di)及網絡接(jie)地(di)(di)(di)等幾種(zhong)情況(kuang)。

為(wei)了實現接(jie)(jie)(jie)地(di)(di)(di)(di)電(dian)阻R≤l歐姆，人(ren)為(wei)地(di)(di)(di)(di)埋入(ru)地(di)(di)(di)(di)中(zhong)的金屬(shu)(shu)件(如鋼管(guan)、角鋼、扁鋼、圓鋼等)稱(cheng)為(wei)人(ren)工(gong)接(jie)(jie)(jie)地(di)(di)(di)(di)體(ti)(ti);兼(jian)作接(jie)(jie)(jie)地(di)(di)(di)(di)體(ti)(ti)用的直(zhi)接(jie)(jie)(jie)與大地(di)(di)(di)(di)接(jie)(jie)(jie)觸的各金屬(shu)(shu)構件、金屬(shu)(shu)井管(guan)、鋼筋(jin)混凝土等建筑物的基礎，以(yi)及(ji)金屬(shu)(shu)管(guan)道和設備等稱(cheng)為(wei)自然接(jie)(jie)(jie)地(di)(di)(di)(di)體(ti)(ti)。與接(jie)(jie)(jie)地(di)(di)(di)(di)體(ti)(ti)連接(jie)(jie)(jie)并引至機房內的金屬(shu)(shu)電(dian)線稱(cheng)為(wei)接(jie)(jie)(jie)地(di)(di)(di)(di)線，接(jie)(jie)(jie)地(di)(di)(di)(di)體(ti)(ti)和接(jie)(jie)(jie)地(di)(di)(di)(di)線的總和稱(cheng)為(wei)接(jie)(jie)(jie)地(di)(di)(di)(di)裝置。

5.電(dian)纜敷設與配管配線

隨系(xi)統(tong)圖配各(ge)低(di)壓配電箱一臺，上(shang)設電流(liu)表(biao)、電壓表(biao)、指示(shi)燈。配電柜(ju)根據實際用(yong)電情況和(he)可擴(kuo)充容(rong)量進行設計。暫(zan)估用(yong)電量為(wei)30kw。接地采(cai)用(yong)TN-s方式，采(cai)用(yong)三相五線(xian)制，零線(xian)和(he)地線(xian)嚴格分開。UPS供電方式為(wei)3×16mm +2×10mm 阻(zu)燃性(xing)電纜引入(ru)機柜(ju)。

考慮(lv)到(dao)機(ji)(ji)(ji)房(fang)電(dian)(dian)纜受環境溫(wen)度影響及散熱條件(jian)不好，電(dian)(dian)纜載(zai)(zai)流量取環境溫(wen)度為+40℃時(shi)的(de)載(zai)(zai)流量。全部(bu)電(dian)(dian)纜選用阻(zu)燃(ran)(ran)型電(dian)(dian)力電(dian)(dian)纜或(huo)阻(zu)燃(ran)(ran)交聯電(dian)(dian)力電(dian)(dian)纜，以滿足機(ji)(ji)(ji)房(fang)防(fang)火的(de)要求。所(suo)有機(ji)(ji)(ji)柜設(she)備及墻地面插座均(jun)通(tong)過(guo)(guo)200mm×50mm鋪地橋架完(wan)成，進(jin)入墻體部(bu)分通(tong)過(guo)(guo)JDG20管或(huo)包塑軟管完(wan)成。為防(fang)止機(ji)(ji)(ji)房(fang)地面漏水，導致電(dian)(dian)線(xian)電(dian)(dian)纜被浸(jin)泡(pao)，地板下所(suo)有金屬線(xian)槽均(jun)通(tong)過(guo)(guo)線(xian)槽托架高于(yu)地面5cm。

吊頂內燈具、插座電(dian)(dian)源線(xian)(xian)(xian)(xian)(xian)(xian)選用阻(zu)火燃聚氯乙烯絕緣銅(tong)芯線(xian)(xian)(xian)(xian)(xian)(xian)，電(dian)(dian)線(xian)(xian)(xian)(xian)(xian)(xian)管(guan)內敷(fu)設，電(dian)(dian)纜(lan)末端穿金(jin)(jin)(jin)(jin)屬(shu)軟管(guan)以(yi)防(fang)(fang)止鼠咬。所(suo)有(you)接(jie)線(xian)(xian)(xian)(xian)(xian)(xian)頭均采(cai)用焊錫或壓(ya)線(xian)(xian)(xian)(xian)(xian)(xian)帽。所(suo)有(you)金(jin)(jin)(jin)(jin)屬(shu)管(guan)、金(jin)(jin)(jin)(jin)屬(shu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)和金(jin)(jin)(jin)(jin)屬(shu)軟管(guan)均可靠接(jie)地。金(jin)(jin)(jin)(jin)屬(shu)管(guan)與(yu)金(jin)(jin)(jin)(jin)屬(shu)管(guan)之間、金(jin)(jin)(jin)(jin)屬(shu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)與(yu)金(jin)(jin)(jin)(jin)屬(shu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)之間以(yi)及金(jin)(jin)(jin)(jin)屬(shu)管(guan)與(yu)金(jin)(jin)(jin)(jin)屬(shu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)之間均通過跨接(jie)地線(xian)(xian)(xian)(xian)(xian)(xian)連接(jie)。在金(jin)(jin)(jin)(jin)屬(shu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)通過不(bu)同防(fang)(fang)火區時，采(cai)用防(fang)(fang)火堵(du)料封閉，以(yi)減少火災蔓延(yan)。

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