1、 CBA 2005 10 10版次Rev.日期Date編 制Prepared By審 核Reviewed By批 準(zhǔn)Approved ByCBI業(yè)主/監(jiān)理Owner/Supervisor修 改 說 明Revision Description. CHINA NUCLEAR INDUSTRY HUAXING CONSTRUCTION CO. 福建液化天然氣站線工程Fujian LNG Terminal and Trunkline Project液化天然氣低溫儲罐土建工程LNG Cryogenic Tank Civil Works編碼CODEDD-MS-HUAX-004文件類別Doc. Type方案

2、Method Statement文件名稱Doc. Title福建LNG施工現(xiàn)場臨時用電方案Method Statement of Jobsite Temporary Power of FJLNG Project版次Rev頁碼PageABCDEFG版次Rev頁碼PageABCDEFG0111122133144155166177188199201021CHANGE RECORD PAGEREVISIONDESCRIPTION OF REVISIONCISSUE FOR REVIEW目 錄 Content1.工程概況General42.供配電方式Method of Power Supply43.配電

3、箱和開關(guān)箱 Distribution Box and Switch Box54.現(xiàn)場防雷保護(hù) Site Lightning Protection65.施工用電負(fù)荷計(jì)算Calculation of Power Load During Construction66.電纜、漏電保護(hù)器選擇Selecting of Cable, Switch76.1. 主電纜截面的選擇 Selection of main cable section76.2. 開關(guān)選擇Selection of Switch87.臨時用電平面圖Temporary Power Layout98.現(xiàn)場臨時用電系統(tǒng)圖Site Temporary

4、 Power System Layout99.現(xiàn)場安全技術(shù)檔案：Site Safety Documents910. 安全用電及防火措施 Safety and Fireproofing of using Power910.1. 安全用電措施 Safety Measures910.2. 電氣防火措施 Fireproofing of electricity1110.3. 雨季臨時用電措施 Rainy Temporary Electricity Measures121.工程概況General福建LNG低溫儲罐轉(zhuǎn)運(yùn)站工程位于福建省莆田市秀嶼區(qū)。業(yè)主為我方現(xiàn)場提供1000KVA, 2000KVA兩臺變壓器

5、，作為用電電源。主要的施工設(shè)備為五臺塔吊，三臺布料機(jī)以及二臺升降機(jī)等，施工的主要特點(diǎn)是用電負(fù)荷大，施工用電需要系數(shù)大。FJLNG Cryogenic Storage Tank project is located in Xiu Yu District, Putian City, Fujian. The client provides two transformers with capacity of 1000KVA and 2000KVA respectively as power supply. During two tanks construction, the main equipmen

6、t includes five tower cranes, three placing booms and two elevators. The construction needs large power supply, power coefficient is great. 2.供配電方式Method of Power Supply 由業(yè)主現(xiàn)場提供的1000KVA，2000KVA變壓器配電室低壓柜已設(shè)電度表，故在我方各個總配電柜不再設(shè)置。供電方式采用三相五線制TN-S系統(tǒng)。 為減少因停電對生產(chǎn)的影響面，故采用放射式的配電方式，即：從變壓器配電室低壓柜引出五個干線回路至施工現(xiàn)場五個總配電柜，

7、分別供塔吊，地泵，升降機(jī)，施工照明以及機(jī)具用電，在總配電箱及開關(guān)箱，以及距離超過100m的箱內(nèi)做重復(fù)接地，并與保護(hù)零線可靠聯(lián)接。工作零線和保護(hù)零線要嚴(yán)格區(qū)分，不得混用。所有機(jī)電設(shè)備的金屬外殼必須與保護(hù)零線做可靠聯(lián)接。對負(fù)荷比較大的塔吊、地泵、采用單獨(dú)回路配電，對距離較遠(yuǎn)且負(fù)荷較小的機(jī)具可采用樹干式配電方式。As ammeter is attached in the low-voltage cabinet of 1000KVA, 2000KVA transformer distribution room provided by owner, we will not install any amm

8、eter in main distribution cabinets. Power is to be provided in TN-S System with three phases five lines. In order to minish the impact of power off upon production, radial way of distribution is adopted, that is: to give out five main line circuits to site five main distribution panels from low-volt

9、age cabinets, which respectively supply power for tower crane, concrete pump, elevator, construction lighting, machines and tools power. The main distribution box, switch box and the distance over 100m between distribution box and switch box should be earthed repeatedly and well connected to PE line

10、. The N line should be strictly differentiated from PE line, cannot be used confusedly. The metal shells of all mechanic equipments should be well connected to PE line. The way of distribution in tower crane and pump with comparatively large load should be separate circuit. Nonetheless, the way of d

11、istribution in machines and tools with long distance and lower load could be in trunk distribution. 施工現(xiàn)場：根據(jù)現(xiàn)場實(shí)際情況變壓器至現(xiàn)場總配電柜線路采用VV22電纜直埋的方式敷設(shè)，到塔吊、地泵的線路采用YCW電纜架空方式敷設(shè)至分配電柜，塔吊、地泵（布料機(jī)）設(shè)置獨(dú)立防水開關(guān)箱，去移動式設(shè)備電源線采用耐磨電纜。Jobsite: According to site circumstance, transformer to site main distribution cabinet is adopt

12、ed with VV22 cable buried underground to crane, pump and placing boom. Circuit is adopted with YCWcable set up to secondary distribution cabinet. One water-proof switch box shall be used for each tower crane, concrete pump (placing boom). Meanwhile portable equipment is adopted with wear-resisting c

13、able.現(xiàn)場開關(guān)箱的設(shè)置：沿罐體四周根據(jù)施工需要設(shè)立防水開關(guān)箱，供振動棒、施工照明等設(shè)備使用；由配電箱引至二級配電箱的電纜可通過繩子固定在模板操作平臺上，二級配電箱和開關(guān)箱將隨著罐體模板的提升而升高（提升過程中總電源應(yīng)切斷），滿足施工生產(chǎn)用電的需要。Setting up of site switch box: Water-proof switch boxes around tank shall be installed as required for the construction equipment such as vibrator, lighting etc. Cable from m

14、ain distribution box to secondary distribution box could be gone along with rope and fixed on the formwork platform. The secondary distribution box and switch box shall be moved up with the formwork lifting (the power shall be cut off during lifting) to satisfy demand for construction.3.配電箱和開關(guān)箱 Dist

15、ribution Box and Switch Box配電箱、開關(guān)箱采用符合標(biāo)準(zhǔn)要求的金屬箱，固定式配電箱、開關(guān)箱的下底與地面的距離大于1.3m，小于1.5m，移動式配電箱、開關(guān)箱的下底與地面的距離大于0. 6m，小于1.5m；配電箱與開關(guān)箱的距離不得超過30m，開關(guān)箱與其控制的設(shè)備水平距離不得超過5m。配電箱與開關(guān)箱必須安裝在干燥，通風(fēng)的場所?，F(xiàn)場配電箱，統(tǒng)一作為防水防塵型。整個臨時配電系統(tǒng)采用兩級漏電保護(hù)。Metal box according with the specification shall be adopted for site distribution box and swi

16、tch box. Distance of the bottom of fixed distribution box and switch box away from ground shall be from 1.3m to 1.5 m; distance of the bottom of moveable distribution box and switch box away from ground shall be from 0.6m to 1.5 m; distance of distribution box away from switch box should be less tha

17、n 30 m; horizontal distance of switch box away from controlled equipment should be less than 5m. Distribution box and switch box should be arranged in dry and ventilated place. Site distribution box shall be water-proof and dust-proof. 2 levels leakage breaker shall be used in the site temporary pow

18、er supply system.現(xiàn)場照明：Site Lighting夜間施工區(qū)照明采用防水碘鎢燈；罐體施工現(xiàn)場：在每臺塔吊上裝三盞3500W鏑燈用于現(xiàn)場夜間照明。由于鋼筋加工廠6#塔吊高度為20米，故采用1000W高壓鈉燈，可以保證照度。The waterproof iodine tungsten lamps shall be used for lighting in the construction area during night shift. Three 3500W dysprosium lamps are installed on each tower crane for site

19、 lighting during night. Owing to 20m high of 6# crane tower at rebar process workshop, we use 1000W high-voltage natrium lamps to ensure the lighting.4.現(xiàn)場防雷保護(hù) Site Lightning Protection在做塔吊基礎(chǔ)時，利用基礎(chǔ)部分主筋相互焊接并與塔吊基礎(chǔ)節(jié)和接地引出線焊接連通形成可靠的良好的電氣連接，采用腳手架鋼管作為接地極與接地引出線焊接，保證接地電阻小于4歐姆，若達(dá)不到要求，則需要增加接地極數(shù)量。When installing

20、 crane foundation, choosing some main rebars welded each other connects with the anchor foot and earthing eduction to make good electrical connection. Scaffold tube to be used for electrode shall be welded with earthing eduction to ensure earthing resistance less than 10; otherwise the number of ele

21、ctrode should be increased.5.施工用電負(fù)荷計(jì)算Calculation of Power Load During Construction主要設(shè)備用電量統(tǒng)計(jì)表Statistics of Power Load of Main Equipment序號S.N.設(shè)備名稱Equipments Name單機(jī)容量（功率）Unit Capacity (Power) 數(shù)量Quantity小計(jì)sub-total (kW)1號罐 Tank 11砼振動器Concrete Vibrator310302地泵Concrete Pump11033303塔吊Tower Crane12022404塔吊T

22、ower Crane16011605升降機(jī)Elevator111116照明Lighting507壓力泵Force Pump7.517.58其它負(fù)荷Other Load202號罐 Tank 21砼振動器Concrete Vibrator310302地泵Concrete Pump11033303塔吊Tower Crane12022404升降機(jī)Elevator111115照明Lighting506壓力泵Force Pump7.517.57其它負(fù)荷Other Load206.電纜、漏電保護(hù)器選擇Selecting of Cable, Switch根據(jù)現(xiàn)場實(shí)際情況，對電氣設(shè)備進(jìn)行分組，利用Excel電子

23、表格計(jì)算。（見附頁1）Divide the electric equipment into groups according to jobsite actual conditions. Result calculated by Excel (refer to appendix). 6.1主電纜截面的選擇 Selection of main cable section A. 按發(fā)熱條件選擇截面 selecting cable as per heating condition查表格3-13，初選VV223*185+2*95電纜，其允許載流量為273A .Looking to Table 3-13,

24、 primary selection of cable is VV223*150+2*70, allowed current-carrying capacity of which is 273A.B. 考慮電壓損失選擇截面selecting cable as per voltage loss查表格3-14，VV系列185mm2的R0=0.0991/km，X0=0.07/km, 把電壓和距離換算為千單位。Looking to Table 3-14, R0=0.0991/km，X0=0.07/km of VV series 185 mm2. Convert Voltage and Distance

25、 into kilo unit.則干線的3#塔吊處的電壓損失為：So the voltage loss of main cable of Tower Crane is: U= R0/10/Ue21nPaLa+ X0/10/Ue21n QaLa=0.0991 /(10*0.382)*200*0.3+0.07/(10*0.382)*80*0.3=4.11+0.86=4.97 5通過計(jì)算主干線選擇VV223*185+2*95電纜（余略）By calculation, select VV223*185+2*95 cable as main cable.(Rest omitted)6.2開關(guān)選擇Sele

26、ction of SwitchA. 開關(guān)的額定電壓線路的額定電壓；Rated voltage of switchRated voltage of circuitB. 開關(guān)的額定電流線路的計(jì)算電流；Rated current of switchcalculated current of circuitC. 開關(guān)脫扣器的額定電流線路的計(jì)算電流；Rated current of tripper of switchcalculated current of circuit 根據(jù)市場調(diào)研，擬采用德力西電器元件，廠家提供資料，主開關(guān)CDM，630A相應(yīng)參數(shù)如下：We plan to use electri

27、c elements provided by DELIXI with information according to market investigation. Main switch is CDM，630A with relevant parameters as followings: Ue=690V400V，符合條件A；Conformity with conditional expression A; Ie=630A273A，符合條件B；Conformity with conditional expression B; Ie=630A273A；符合條件C；Conformity with

28、conditional expression C;故開關(guān)符合要求。其他分配電箱主開關(guān)及漏電保護(hù)器選擇（略）So switch is qualified. Selection of main switches and leakage breakers of other DISTRIBUTION BOX are omitted.7.臨時用電平面圖Temporary Power LayoutRefer to DD-DWG-EL-001. DD-DWG-EL-0028.現(xiàn)場臨時用電系統(tǒng)圖Site Temporary Power System LayoutRefer to DD-DWG-EL-003.

29、DD-DWG-EL-004. DD-DWG-EL-005 . DD-DWG-EL-006. DD-DWG-EL-007. . DD-DWG-EL-0089.現(xiàn)場安全技術(shù)檔案：Site Safety Documents現(xiàn)場臨時用電施工組織設(shè)計(jì)；Site Temporary Power Construction and Organization Arrangement現(xiàn)場臨時用電接地電阻記錄；Ground Electrical Resistance Record of Site Temporary Power 現(xiàn)場臨時用電定期檢查記錄；Periodic Inspection Record of S

30、ite Temporary Power 現(xiàn)場臨時用電巡視維修記錄；Inspection and Repair Record of Site Temporary Power 10安全用電及防火措施 Safety and Fireproofing of using Power10.1安全用電措施 Safety Measures技術(shù)措施 Technical Measures 施工現(xiàn)場供電采用TN-S接零保護(hù)系統(tǒng)，保護(hù)零線應(yīng)與工作零線分開單獨(dú)使用，杜絕混用。PE線在總配電箱處做一組重復(fù)接地，接地電阻不大于10。PE線不能加設(shè)開關(guān)及熔斷器，所有電氣設(shè)備的金屬外殼必須與PE線做可靠電氣連接，不能一部分接零

31、，一部分接地。Power supply carries out connecting Zero Line protection system, protection Zero Line and working Zero Line should be used respectively. PE Line should be earthed repeatedly at main DISTRIBUTION BOX，ground electric resistance is less than 10.Switch and fuse should not be connected with PE lin

32、e and all metal shells of electric equipments should also be connected with PE line dependably rather than one part be connected to zero line and another be connected to ground.1) 施工現(xiàn)場的配電箱和開關(guān)箱應(yīng)配置兩級漏電保護(hù)，并選用電流動作型，漏電動作電流不大于30mA，額定漏電動作時間應(yīng)不大于0.1S。潮濕及手持工具末級漏電動作電流應(yīng)不大于15mA。DISTRIBUTION BOX and Switch box on

33、 construction site shall have 2 Level leakage breaker with maximum current less than 30mA and time for cutting current less than 0.1s. The maximum current of leakage breaker to cut circuit shall be less than 15mA in moist places and of hand control tools.2) 配電箱實(shí)行一機(jī)一閘，并應(yīng)有過載、短路、及斷路保護(hù)功能。One machine mat

34、ches one switch in DISTRIBUTION BOX with the function of overload breaker, short breaker and circuit breaker.3) 配電箱內(nèi)設(shè)備必須完好無損，安裝牢固，導(dǎo)線接頭包扎嚴(yán)密，絕緣良好，電源線進(jìn)箱處做固定。箱內(nèi)分路應(yīng)標(biāo)注明確。箱門內(nèi)側(cè)應(yīng)標(biāo)有單線系統(tǒng)，箱門應(yīng)配鎖，并由專人負(fù)責(zé)。配電箱周圍不能有雜物。Equipment in DISTRIBUTION BOX are not allowed to damage, the installation should be fixed; the condu

35、cting wire connection should be tight; insulating condition is good; power supple wire in DISTRIBUTION BOX should be fixed; the branch circuit in DISTRIBUTION BOX should be marked clearly; inside DISTRIBUTION BOX there should be One Level system; the door of DISTRIBUTION BOX should be locked, and pr

36、ofessional worker should be responsible for it. There is not any rubbish around DISTRIBUTION BOX.4) 潮濕場所應(yīng)采用安全電壓36V或24V照明。碘鎢燈用鐵架的應(yīng)做好保護(hù)接零，所有220V燈具都應(yīng)使用單極漏電保護(hù)開關(guān)。Where moist places are should be security voltage 36V or 24V lighting. Iodine tungsten lamp should protect in connecting Zero Line, all the lig

37、hting fixtures 220V should use One Level with leakage breaker.5) 電動建筑機(jī)械和手持電動工具使用需符合JCJ46-88第八章的有關(guān)要求。Electric construction machine and manual electrical machine should meet related requirement in Chapter Eight of JCJ46-88.6) 對分類用電人員進(jìn)行安全基本知識培訓(xùn)，并做好安全技術(shù)交底。Conduct security basic knowledge training for el

38、ectricians, and finish the security technical induction.7) 電氣設(shè)備，配電系統(tǒng)要定期檢查，做好記錄。線路檢修時，實(shí)行工作票制，由專業(yè)電工檢修設(shè)專人統(tǒng)一組織，統(tǒng)一指揮。Electrical equipment and distribution system should be tested periodically, with making records. When circuit is examined, professional electrician should examine and repair by unified org

39、anization.1.1.1. 組織措施 Organization Measures1) 建立安全檢查制度。包括內(nèi)容：接地電阻、電氣設(shè)備絕緣、漏電保護(hù)器動作靈敏度等，用電設(shè)備是否安全可行并做好檢測記錄。Establish security inspection rules, including: whether ground electric resistance, electrical equipment insulating and leakage breaker are flexible or acute, etc; whether electrical equipments are

40、safe and make the record of inspection.2) 建立臨時用電施工組織設(shè)計(jì)的編制，審批驗(yàn)收制度。Establish preparation, approval and acceptance system of temporary power construction organization design.3) 建立技術(shù)交底，履行交底人與交被交底人的簽字手續(xù)，寫明交底日期。Establish technical induction; carry out the sign record between two parties.4) 建立維修制度，做好維修工作日志

41、，內(nèi)容應(yīng)詳細(xì)，記載時間、內(nèi)容及處結(jié)果，并有維修人員及驗(yàn)收人員簽字。Establish repairing rules; finish the daily record. The contents should be detailed, such as record time, contents and results, meanwhile repair and acceptance worker should sign.5) 建立拆除制度不用的閘箱設(shè)備隨時拆除。Establish the system of dismantling, ie, dismantle immediately idle

42、 brake box.6) 建立安全用電責(zé)任制，落實(shí)到人。Establish security power responsibility system.7) 持證上崗，禁止非電工無證上崗。Only can electricians with permit go to work.8) 進(jìn)行專業(yè)培訓(xùn)，提高電氣工作人員的專業(yè)素質(zhì)。Carry on professional training, improve technical competence.10.2電氣防火措施 Fireproofing of electricity1.1.2. 技術(shù)措施 Technical Measures1) 合理配制各

43、種電氣設(shè)備的保護(hù)裝置，對用電設(shè)備過載、短路、進(jìn)行可靠的保護(hù)。Install rationally protection devices of all kinds of electrical equipments.2) 電氣設(shè)備集中場所應(yīng)配置滅火器材，電氣設(shè)備周圍嚴(yán)禁煙火。Electrical equipments in concentrated places should install fire-extinguishing equipments, firework is forbidden strictly around electrical equipments. 3) 配電箱、電氣設(shè)備周

44、圍不準(zhǔn)堆放易燃、易爆物品，不準(zhǔn)使用火源。Explosive and combustible materials are not allowed around DISTRIBUTION BOX and electrical equipments, fire source is forbidden 4) 電氣焊時，周圍嚴(yán)禁有易燃易爆物品、乙炔瓶、氧氣瓶和焊點(diǎn)三者距離要符合規(guī)范要求。In the process of electrogas welding, explosive and combustible materials are not allowed around DISTRIBUTION

45、BOX and electrical equipments. Meanwhile the distance among acetylene cylinder, oxygen cylinder and welding point should be in accordance with specifications request. 5) 定期檢測電氣設(shè)備的絕緣程度。Periodically check up the insulated degrees of electrical equipments. 6) 嚴(yán)禁不經(jīng)批準(zhǔn)使用電爐。Forbidden to use electric stove

46、without permit. 1.1.3. 組織措施 Organization Measures 1) 建立易燃易爆場所管理制度。Establish the management regulations of explosive and combustible place. 2) 建立電氣防火教育制度提高各類用電人員電氣防火的自學(xué)性。Establish the electrical fire protection education system and improve the self-education consciousness of the electrical worker. 3)

47、 建立電氣防火責(zé)任制，加強(qiáng)電氣防火重點(diǎn)場所煙火管制。Establish electrical fire protection responsibility rules, and enhance electrical fire protection firework management in important places. 4) 建立電氣防火檢查制度發(fā)現(xiàn)問題及時處理。 Establish electrical fire protection inspection rules. Find and solve problems promptly.5) 強(qiáng)化電氣防火領(lǐng)導(dǎo)體制，建立電氣防火隊(duì)伍。R

48、einforce electrical fire protection leader system, and establish fire protection groups.10.3雨季臨時用電措施 Rainy Temporary Electricity MeasuresA. 雨季時要對用電設(shè)備增加巡視次數(shù)。Make an inspection tour more frequently in rainy days.B. 下雨時要將配電箱箱門關(guān)好，防止進(jìn)水。Close the door of DISTRIBUTION BOX to keep away from water in rainy days.C. 雨后要對所有用電設(shè)備進(jìn)行絕緣搖測合格后方可使用。Dont use all the electricity equipments until approving insulated remote sensing test after raining.