Hauv kev lag luam hluav taws xob faib hluav taws xob, lub hauv paus ntawm switchgear-tshwj xeeb tshaj yogenclosed hluav taws xob switchgear, high voltage hluav taws xob switchgear, thiabnruab nrab voltage switchgear-yog "kab kawg ntawm kev tiv thaiv" los ua kom muaj kev nyab xeeb ntawm cov khoom siv thiab kev nyab xeeb ntawm cov neeg ua haujlwm. Nws lub luag haujlwm tseem ceeb yog ua kom cov dej ntws tawm sai sai rau hauv av, tiv thaiv cov khoom siv los ntawm kev ua hluav taws xob lossis ua rau hluav taws kub. Txawm li cas los xij, thaum lub sijhawm teeb tsa tiag tiag, ntau tus neeg ua haujlwm tsim kho, vim muaj kev paub tsis meej lossis nrhiav kev yooj yim, tau ua txhaum ntau, thaum kawg tso cov hauv paus rau kev sib tsoo. Raws li cov chaw tsim khoom lag luam tshwj xeeb hauv cov khoom siv hluav taws xob, Zhejiang Lvma Electric Co., Ltd. (LVMA) tau tsim cov kev paub nplua nuj nyob hauv R & D, ntau lawm, thiab kev txhawb nqa ntawm cov khoom siv hluav taws xob, hluav taws xob hluav taws xob hluav taws xob, thiab nruab nrab voltage switchgear.
Misconception 1: Nias ntau lub hauv av xaim mus rau ib qho chaw hauv av, xav tias nws yog qhov luv thiab yog li ua rau muaj kev phom sij.
Misconception manifestation:
Qee cov neeg ua haujlwm tsim kho, txhawm rau txhawm rau txo qhov kev ua haujlwm ntawm cov xaim, nias 3 lossis ntau dua cov xaim hauv av mus rau tib qhov chaw hauv av.enclosed hluav taws xob switchgearlos yognruab nrab voltage switchgear, ntseeg tias "tsuas yog nws ua hluav taws xob, tsis muaj teeb meem" thiab txawm tias qhov kev ua haujlwm no yog kev lag luam. Txawm li cas los xij, lawv txuas cov kab hauv av ntawm ntau yamhigh voltage hluav taws xob switchgearlos yog nruab nrab voltage switchgear nyob rau hauv series mus rau tib lub davhlau ya nyob twg, omitting lub ywj siab grounding kauj ruam. Qhov kev ua haujlwm tsis tu ncua no kuj nquag pom nyob rau ntawm - qhov chaw tshuaj xyuas los ntawm Zhejiang Lvma Electric Co., Ltd. (LVMA) rau cov neeg siv khoom.
Core Risks:
Kev tiv thaiv ntau dhau: Qhov chaw nias thiab nruj torque ntawm lub ntsia liaj qhov rooj - hom davhlau ya nyob twg yog tsau. Thaum muaj ntau cov xov hlau sib txuas, qee cov xov hlau yuav raug txiav ib feem, ua rau muaj kev tiv thaiv kev tiv thaiv ntau ntxiv, thiab thaum muaj qhov txhaum tam sim no dhau los ntawm cov hluav taws xob hloov hluav taws xob lossis cov hluav taws xob hluav taws xob hluav taws xob siab, nws yog qhov tsim kom muaj qhov kub thiab txias, hlawv lub davhlau ya nyob twg thiab txheej rwb thaiv tsev ntawm cov hlau;
Grounding continuity tsis ua hauj lwm: Ib lub davhlau ya nyob twg xoob yuav ua rau txhua qhov txuas txuas hluav taws xob hloov hluav taws xob lossis nruab nrab voltage switchgear kom poob kev tiv thaiv hauv av ib txhij, ua rau "cov saw tsis ua haujlwm";
Cov kev pheej hmoo ntawm kev saib xyuas: Thaum lub sijhawm tu, tshem tawm ib lub xaim tuaj yeem ua rau lwm cov xov hlau poob, thiab nws tsis tuaj yeem paub qhov txawv sai sai uas cov hlau sib raug rau cov hluav taws xob hluav taws xob loj lossis nruab nrab voltage switchgear, ncua sij hawm rau kev ua txhaum cai.
Kev ua tau zoo thiab tsim nyog:
Raws li qhov yuav tsum tau ua ntawm Tshooj 4.3 ntawm GB 50169-2016, txhua yam khoom siv hluav taws xob hauv av-txawm yog rauenclosed hluav taws xob switchgear, high voltage hluav taws xob switchgear, los yognruab nrab voltage switchgear-yuav tsum tau txuas nrog lub busbar hauv av nrog ib txoj hlua hauv av. Nws yog nruj me ntsis txwv tsis pub mus txuas ntau yam khoom siv uas yuav tsum tau grounding nyob rau hauv ib tug grounding hlau. Zhejiang Lvma Electric Co., Ltd. (LVMA) kuj qhia meej txog qhov yuav tsum tau muaj nyob rau hauv phau ntawv qhia kev teeb tsa ntawm nws cov khoom siv hluav taws xob los coj cov pab pawg tsim kho hauv cov haujlwm ua haujlwm. Nyob rau tib lub sijhawm, cov hauv qab no yuav tsum tau saib xyuas:
Txhua sab ntawm ib lub dav hlau hauv av yuav tsum tsis pub tshaj 2 xov hlau; lub tiaj tus ntxhua khaub ncaws yuav tsum tau ntxiv ntawm qhov sib txuas ntawm lub bolt;
Kev kho mob ntawm ntau yamenclosed hluav taws xob switchgearlos yoghigh voltage hluav taws xob switchgearyuav tsum tau txuas nrog nyias mus rau hauv av busbar, thiab nws yog nruj me ntsis txwv tsis pub mus txuas rau lawv nyob rau hauv series;
Thaum nias lub grounding xaim mus rau lub davhlau ya nyob twg ntawmnruab nrab voltage switchgear, xyuas kom meej qhov chaw sib cuag yog huv si, siv los tiv thaiv - loosening bolts rau zawm, thiab lub torque yuav tsum ua raws li cov kev cai tshwj xeeb.
Kev ntseeg yuam kev 2: Kev tiv thaiv av dhau qhov txwv, tsis quav ntsej txog av thiab tiv thaiv - ntsuas kev tiv thaiv
Misconception manifestation:
Thaum lub sij hawm tsim kho, qhov tsim nyog grounding electrode tsis raug xaiv raws li cov av resistivity rau high voltage hluav taws xob switchgear los yog nruab nrab voltage switchgear, los yog anti- kev kho tsis kam raug tshem tawm, thiab tsuas yog ib tug hlau pas nrig tsuas yog faus raws li cov av electrode, uas ua rau ib tug grounding kuj siab tshaj tus qauv txwv (feem ntau tsawg dua los yog sib npaug rau 4Ω). Qee qhov haujlwm uas suav nrog cov hluav taws xob hloov hluav taws xob tseem tsis tau ua qhov kev ntsuam xyuas hauv av thiab tau txais ncaj qha thiab xa. Nyob rau tom qab- kev muag khoom ntawm Zhejiang Lvma Electric Co., Ltd. (LVMA), ntau yam khoom siv tsis txaus siab muaj feem cuam tshuam rau qhov kev xav tsis zoo no.
Tej xwm txheej xwm txheej:
Ib qho 220kV substation's 10kV feeder kab qhov hluav taws xob txuas nroghigh voltage hluav taws xob switchgeartau ntsib ib zaug xwb -theem grounding txhaum. Vim lub grounding tsis kam ntawm high voltage hluav taws xob switchgear tshaj qhov txwv, qhov txhaum tam sim no tsis tuaj yeem tawm sai sai, ua rau B thiab C theem voltages nce, ua rau arc overvoltage, thiab cov rwb thaiv tsev ntawm cov busbars tawg, tsim mus rau hauv peb-theem luv luv Circuit Court. Qhov siab -kub arc ua rau muaj kev puas tsuaj loj rau lub txee ntawm lubenclosed hluav taws xob switchgearthiab cov khoom siv sab hauv, ua rau 10kV busbar tripping thiab fais fab tuag, cuam tshuam rau cov khoom siv hluav taws xob hauv cheeb tsam. Tom qab tau txais cov neeg siv khoom thov kev pab, Zhejiang Lvma Electric Co., Ltd. (LVMA) tau xa cov neeg ua haujlwm rau lub xaib rau kev tshawb nrhiav. Qhov kev ntsuam xyuas txhaum qhia tau hais tias cov av electrode ntawm qhov nonruab nrab voltage switchgeartsis tau txais kev tiv thaiv los tiv thaiv- ntsuas kev tiv thaiv raws li cov av, thiab ntsuas av tiv thaiv tau mus txog 12Ω, deb tshaj qhov yuav tsum tau ua. Pab pawg LVMA tau muab cov phiaj xwm hloov pauv thiab ua tiav kev ua haujlwm ruaj ntseg ntawm cov cuab yeej siv.
Core Risks:
Overvoltage breakdown: Thaum lub grounding tsis kam tshaj qhov kev txwv, cov xau tam sim no ntawm cov hluav taws xob hloov hluav taws xob los yog qhov nruab nrab voltage switchgear tsis tuaj yeem tawm tam sim ntawd, ua rau cov khoom siv casing muaj peev xwm nce siab, ua rau cov rwb thaiv tsev tawg ntawm theem;
Kev tiv thaiv cov cuab yeej ua haujlwm tsis ua haujlwm: Qhov txhaum tam sim no tsis ncav cuag qhov pib ntawm kev tiv thaiv kev tiv thaiv hluav taws xob hluav taws xob hloov hluav taws xob los ua, tiv thaiv kev txiav sai sai - tawm ntawm lub hwj chim, nthuav qhov cuam tshuam ntawm kev sib tsoo;
Kev pheej hmoo ntawm cov neeg ua haujlwm hluav taws xob poob siab: Thaum cov khoom siv ntawm cov khoom siv hluav taws xob kaw qhov hluav taws xob hloov hluav taws xob, cov av hauv av tsis tuaj yeem txo qhov hluav taws xob hauv av, thiab tus neeg nyob hauv kev sib cuag yuav raug hluav taws xob poob siab.
Kev ua tau zoo thiab tsim nyog:
Raws li "kev tiv thaiv-tsis kam" rau cov khoom siv hauv av hauv Tshooj 4.4 ntawm GB 50169-2016:
Ua ntej kev tsim kho, cov av resistivity yuav tsum tau sim, thiab hom av electrode (ntu los yog kab rov tav) yuav tsum tau xaiv raws li qhov kev ntsuam xyuas rau high voltage hluav taws xob switchgear thiab nruab nrab voltage switchgear; Zhejiang Lvma Electric Co., Ltd. (LVMA) xav kom cov neeg siv khoom koom tes nrog cov kws tshaj lij kev sim cov chaw kom tau txais cov ntaub ntawv av tseeb ua ntej kev teeb tsa;
Kev tiv thaiv hauv av yuav tsum ua raws li cov cai hauv qab no: rau kev dav davenclosed hluav taws xob switchgear, Tsawg dua los yog sib npaug rau 4Ω; nyob rau hauv explosive txaus ntshai ib puag ncig rauhigh voltage hluav taws xob switchgear, Tsawg dua los yog sib npaug rau 1Ω; nyob rau hauv cov cheeb tsam nrog siab av resistivity raunruab nrab voltage switchgear, tiv thaiv - ntsuas kev tiv thaiv (xws li kev hloov av, ntxiv cov tshuaj tiv thaiv- cov neeg ua haujlwm tiv thaiv, nce tus naj npawb ntawm cov electrodes hauv av) yuav tsum tau noj;
Cov av electrode yuav tsum nyob deb ntawm cov kav dej hauv av, cov kab hluav taws xob, thiab lwm yam. Qhov faus qhov tob ntawm ntsug grounding electrodes rau cov hluav taws xob hloov hluav taws xob yuav tsum tsis pub tsawg dua 0.6m, thiab qhov sib nrug ntawm kab rov tav grounding electrodes rau high voltage hluav taws xob switchgear yuav tsum tsis pub tsawg tshaj 5m;
Thaum lub sij hawm txais qhov project, lub grounding kuj ntawm nruab nrab voltage switchgear thiab kaw hluav taws xob switchgear yuav tsum tau ntsuas, thiab yog hais tias nws yog tsis tsim nyog, nws yuav tsum tau kho kom haum raws li cov qauv ua ntej muab tso rau hauv kev siv. LVMA's tom qab- pab pawg muag khoom tuaj yeem muab cov kws tshaj lij kev sim thiab cov lus qhia kho kom raug.
Kev xav tsis zoo 3: Kev xaiv tsis raug ntawm cov xaim hauv av, nrog cov ntoo khaub lig tsis txaus - ntu ntu lossis cov khoom siv tsis sib xws
Misconception manifestation:
Siv cov xov hlau zoo tib yam es tsis txhob siv cov xaim hauv av rau cov khoom siv hluav taws xob los yog cov hluav taws xob hluav taws xob siab, lossis muaj cov xaim hauv av nrog tus ntoo khaub lig- thaj tsam tsawg dua li qhov yuav tsum tau ua (xws li tooj liab tub ntxhais hlau nrog tus ntoo khaub lig- thaj tsam tsawg dua 25mm²), qee qhov haujlwm uas muaj feem cuam tshuam nrog nruab nrab ntawm cov khoom siv hluav taws xob siv hluav taws xob thiab cov khoom siv hluav taws xob kom txuag tau cov nqi hluav taws xob. Zhejiang Lvma Electric Co., Ltd. (LVMA) ceeb toom cov neeg siv khoom tias qhov zoo ntawm cov xaim hauv av ncaj qha cuam tshuam rau kev nyab xeeb ntawm tag nrho cov hluav taws xob faib hluav taws xob, thiab nws yog txwv tsis pub txiav cov fab.
Tej xwm txheej xwm txheej:
Thaum tus kws kho hluav taws xob tau tshuaj xyuas lub 35kV transformer txuas nrog nruab nrab voltage switchgear, nws siv ib tug tooj liab tub ntxhais hlau nrog ib tug ntoo khaub lig-sectional cheeb tsam ntawm 10mm² raws li lub grounding hlau rau nruab nrab voltage switchgear, thiab lub grounding kawg tsis nruj, tsuas yog "tso rau" rau hauv av electrode. Thaum lub sij hawm soj ntsuam, lub dispatch yuam kev xa lub zog, thiab qhov txhaum tam sim no dhau los ntawm grounding hlau ntawm high voltage hluav taws xob switchgear. Vim yog qhov me me ntawm tus ntoo khaub lig- ntu ntu thiab kev sib cuag tsis zoo, qhov kub siab - kub arc raug tsim, hlawv cov xaim hauv av thiab hlawv hluav taws xob txhais caj npab. Tom qab qhov xwm txheej, tus neeg siv khoom hu rau Zhejiang Lvma Electric Co., Ltd. (LVMA) rau kev txhawb nqa. Nws tau pom tias lub peev xwm thauj khoom ntawm cov xaim hauv av no rau cov khoom siv hluav taws xob kaw tau qis dua qhov luv luv - qhov yuav tsum tau muaj tam sim no, tsis tuaj yeem tiv taus qhov cuam tshuam. Pab pawg LVMA tau hloov cov xaim hauv av nrog cov tub ntxhais tooj liab ua raws li 35mm² thiab ua qauv kev sib txuas, tshem tawm cov teeb meem kev nyab xeeb.
Core Risks:
Hlau burnout: Thaum luv luv -circuit tam sim no dhau los ntawm ib tug nyias cross-sectional grounding wire ntawm high voltage hluav taws xob switchgear los yog nruab nrab voltage switchgear, nws yuav overheat thiab yaj, ua rau cov av tiv thaiv tsis ua hauj lwm;
Kev sib cuag tsis zoo: Aluminium conductors siv rau cov khoom siv hluav taws xob kaw yog qhov ua rau oxidation, thiab qhov kev tiv thaiv ntawm qhov kev sib txuas tau nce, uas yog feem ntau rau kev sib txuas hauv lub sijhawm ntev;
Corrosion tsis ua hauj lwm: Uncoated grounding xov hlau ntawm nruab nrab voltage switchgear corrode nyob rau hauv ib puag ncig ntub, txo qhov kev cia siab ntawm grounding.
Yog thiab standardized installation:
Raws li "Kev Xaiv Cov Khoom Siv Hauv Tsev" thiab kev lag luam cov qauv siv:
Cov khoom siv ntawm cov xaim hauv av rau cov khoom siv hluav taws xob kaw, cov hluav taws xob hluav taws xob hluav taws xob siab, thiab nruab nrab voltage switchgear yuav tsum nyiam siv tooj liab conductors; nyob rau hauv tej qhov chaw muaj kev phom sij rau cov hluav taws xob hluav taws xob hluav taws xob siab, cov xov tooj tooj liab yuav tsum tau siv; Aluminium conductors raug txwv. Zhejiang Lvma Hluav Taws Xob Co., Ltd. (LVMA) muab kev sib koom ua ke hauv av xaim rau nws cov khoom siv hluav taws xob kom ua raws li cov lus qhia tshwj xeeb;
Tus ntoo khaub lig- ntu ntu ntawm cov xaim hauv av yuav tsum sib npaug ntawm cov khoom siv hluav taws xob thiab luv luv- tam sim no: rau 10kV thiab qis dua qhov nruab nrab voltage switchgear, cov tub ntxhais tooj liab hla- ntu ntu ntawm cov xaim hauv av yuav tsum tsis pub tsawg dua 25mm², thiab rau 35kV high voltage hluav taws xob switchgear yuav tsum tsis pub tsawg tshaj 3 mm²;
Kev sib txuas ntawm cov xaim hauv av rau cov khoom siv hluav taws xob kaw yuav tsum nruj nrog bolts lossis welded; thaum txuas tooj liab thiab txhuas rau nruab nrab voltage switchgear, ib qho kev hloov pauv yuav tsum tau nruab, thiab tag nrho cov ntsiab lus txuas yuav tsum tau kho corrosion (galvanized lossis coated nrog anti- xim xim);
Cov xaim hauv av ntawm cov hluav taws xob hluav taws xob hluav taws xob siab yuav tsum tsis txhob muaj qhov chaw tawg thiab tawg thiab yuav tsum tsis txhob muab tso rau hauv cov cables thiab yuav tsum muaj qhov nrug deb ntawm tsis pub tsawg tshaj 0.5m; thaum hla cov phab ntsa, yuav tsum tau ntxiv cov yeeb nkab tiv thaiv.