General Requirements for Grounding Systems
Cov khoom siv hauv av yog qhov tseem ceeb ntawm kev sib txuas uas muaj cov xaim hauv av, cov khoom siv hauv av, thiab cov neeg nyob hauv. Yog li ntawd, muaj qee yam yuav tsum tau ua rau grounding thiab grounding hlau. Cov kev cai dav dav yog: kev ntseeg siab, kev tiv thaiv corrosion, tsis tshua muaj hluav taws xob tsis kam, kav ntev, kev lag luam, muaj zog txaus, thiab yooj yim ntawm kev ntsuas thiab kev saib xyuas, thiab lwm yam tshwj xeeb:
1. Cov xaim hauv av yuav tsum yog ua los ntawm cov khoom siv tsis zoo, xws li tooj liab lossis txhuas stranded hlau, lossis lwm yam tsawg-resistivity, corrosion- cov ntaub ntawv tiv taus. Nws yuav tsum muaj lub zog txaus thiab yuav tsum muaj cov disconnectors ntawm kab.
2. Cov khoom siv hauv av electrode yuav tsum muaj qhov tsis muaj zog. Feem ntau, galvanized steel kav nrog phab ntsa thickness tsis tsawg dua 3.5 hli thiab ntev ntawm 2.5 hli (50 * 50 * 5mm) los yog lub kaum sab xis steel (50 * 50 * 5mm, 2.5m ntev) yog siv. Txawm hais tias lub tiaj tus hlau los yog lub kaum sab xis steel, qhov kawg yuav tsum tau flattened thiab sharpened. Aluminium daim hlau los yog rods yuav tsum tsis txhob siv, vim hais tias lawv yog ib qho nyuaj rau txuas mus rau conductors, thiab tseem ceeb tshaj, txhuas yooj yim tsim ib tug tiv thaiv aluminium oxide zaj duab xis thaum muab tso rau hauv av, ua rau cov resistivity.
3. Kev sib txuas ntawm cov khoom siv hauv av yuav tsum txhim khu kev qha, zoo dua yog siv crimping lossis lap joints kom ntseeg tau tias kev sib txuas muaj zog thiab txhim khu kev qha thaum txo kev sib cuag. Kub- melt welding kuj siv tau, tab sis nws yog ib qho tseem ceeb uas cov khoom siv vuam zoo ib yam; tin - txhuas vuam txwv tsis pub.
4. Rau qhov yooj yim ntawm kev ntsuas, yuav tsum tau muab tshem tawm bolted kev twb kev txuas taw tes nruab nrab ntawm lub grounding electrode thiab cov grounding main kab, kom ntseeg tau ib tug txhim khu kev qha kev twb kev txuas.
5. Txoj kab hauv av txuas nrog lub zog hluav taws xob thiab cov hluav taws xob hauv av yuav tsum ua raws li txoj kev luv tshaj plaws.
6. Raws li txoj cai, cov khoom siv hluav taws xob hauv av tuaj yeem siv rau kev nyab xeeb hauv av, hluav taws xob hauv av, thiab kev tiv thaiv hluav taws xob hauv av, xws li cov khoom siv hauv cov kav dej, cov kav dej hauv tsev (tsis suav nrog cov kav dej roj), lub tsev hlau thav ntawv, thiab cov pob zeb hauv av hauv av. Txawm li cas los xij, ua ntej siv, qhov kev tiv thaiv hauv av yuav tsum tau ntsuas kom ntseeg tau tias nws ua tau raws li qhov yuav tsum tau ua hauv av; txwv tsis pub, nws yuav siv tsis tau.