Txawm hais tias lub tshuab hluav taws xob kub kub tuaj yeem txuas ntxiv cov khoom lag luam tom qab raug cov dej noo nyob ntawm qhov ntsuas tus nqi ntawm nws cov rwb thaiv tsev tiv thaiv: Yog tias qhov rwb thaiv tsev tsis kam ntawm txhua qhov cua sov tshaj 1 MΩ, ceev faj, luv luv - lub sijhawm ua haujlwm tau tso cai, yog tias kev saib xyuas muaj zog. Yog tias qhov tsis kam poob ntawm 100 kΩ thiab 1 MΩ, qhov nruab nrab - mus rau - muaj kev pheej hmoo siab, thiab kev kaw tam sim rau kev kho yog pom zoo. Yog tias qhov tsis kam poob qis dua 100 kΩ, kev tsim khoom raug txwv nruj; tsis ua raws li txoj cai no tuaj yeem ua rau luv luv - kev mus ncig hauv Circuit Court, hlawv cov cua sov, lossis tseem ua rau muaj teeb meem kev nyab xeeb xws li hluav taws xob poob lossis hluav taws.
1. Cov lus pom zoo tsim khoom raws li cov txheej txheem rwb thaiv tsev
|
Rwb thaiv tsev Resistance nqi |
Ntau lawm Feasibility |
Risk Level |
Pom zoo ua |
|
> 1 MΩ |
Luv - lub sij hawm tsim khoom tau tso cai |
Tsawg Risk |
Intensify kub tswj xyuas; teem caij kom qhuav kom huv si thaum lub sij hawm npaj kaw tom ntej. |
|
100 kΩ – 1 MΩ |
Kev tsim tawm raug ncua |
Nruab nrab-rau-High Risk |
Tam sim ntawd txiav fais fab; ntxuav thiab qhuav qhov system ntawm qhov kub thiab txias; rov pib ua haujlwm tsuas yog tom qab rov- kev kuaj pom tseeb tias ua raws li cov qauv kev nyab xeeb. |
|
< 100 kΩ (or approaching zero) |
Ntau lawm txwv tsis pub |
Muaj kev pheej hmoo siab heev |
Cov khoom puas yuav tsum tau hloov; yuam kev pib yog txwv tsis pub. |
Kev Lag Luam Kev Nyab Xeeb Hauv paus: Raws li cov cai hluav taws xob kev nyab xeeb, txhua qhov kev tiv thaiv hluav taws xob nyeem hauv qab 1 MΩ yog suav tias yog qhov txawv txav. Muab qhov feem ntau hnyav ua haujlwm ib puag ncig ntawm kub khiav tshuab, txawm tias cov qauv nruj dua yuav tsum tau siv.
2. Vim li cas "Kev Ua Haujlwm Thaum Muaj Kev Nyuaj Siab" tsis tuaj yeem lees txais?
Risk of Leakage thiab Arcing: Energizing lub kaw lus nyob rau hauv ib qho chaw ntub dej yuav yooj yim tsim hluav taws xob arcs ntawm kev sib txuas cov ntsiab lus, muaj peev xwm igniting yas residues los yog hydraulic roj.
Vicious Cycle of Carbonization: Cov hluav taws xob hauv cheeb tsam tuaj yeem carbonize cov ntaub ntawv nyob ib puag ncig, tsim cov kev coj ua uas txuas ntxiv degrade lub rwb thaiv tsev ncaj ncees.
Kev cuam tshuam ntau lawm ntawm Sudden Tripping: Ib qho luv luv luv luv thaum lub sijhawm ua haujlwm tuaj yeem nqa tag nrho cov kab ntau lawm kom nres, feem ntau xav tau 4 mus rau 8 teev (lossis ntau dua) los kho.
Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb: Cov neeg ua haujlwm ntsib teeb meem loj ntawm hluav taws xob poob siab thaum nkag mus rau cov pwm muaj zog- qhov phom sij tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej.
3. Yam yuavtsum tau kawm uantej rau kev nyab xeeb
Yog tias qhov ntsuas ntsuas qhov ntsuas tsis zoo tshaj 1 MΩ thiab tsis muaj qhov pom ntawm cov dej noo tam sim no, thiab yog tias kev ua haujlwm ib ntus pom tau tias tsim nyog, cov xwm txheej hauv qab no yuav tsum tau ua:
Siv 500V DC megohmmeter los xyuas kom meej tias txhua qhov cua sov channel ua tau raws li cov qauv xav tau;
Ntxuav lub connector terminals kom tshem tawm cov roj residue los yog ya raws;
Tsim ib tus neeg tshwj xeeb los sawv saib thawj 30 feeb tom qab pib ua haujlwm, saib xyuas cov suab nrov txawv txav, haus luam yeeb, lossis kub tsis xwm yeem;
Teem kom tiav cov txheej txheem kom qhuav los yog hloov cov khoom kom tiav hauv 24 teev.
Lus Cim: Cov dej noo ingress tsis yog "qhov teeb meem me," tab sis yog qhov ua ntej rau cov khoom siv tsis ua haujlwm. Txawm hais tias chav tsev tseem ua haujlwm ib ntus, kev kho yuav tsum ua kom tiav hauv 72 teev kom tsis txhob muaj kev puas tsuaj mus tas li.
