Rwb thaiv tsev tsis kam yog qhov tseem ceeb ntawm qhov tseem ceeb siv los ntsuas qhov muaj peev xwm ntawm cov ntaub ntawv insulating kom tawm tsam cov dej hluav taws xob. Nws qhia tau qhov zoo ntawm rwb thaiv tsev hauv cov khoom siv hluav taws xob thiab tshuab, ua kom muaj kev nyab xeeb thiab txhim khu kev qha. Rwb thaiv tsev tiv thaiv yog qhov tseem ceeb ntawm hluav taws xob kev saib xyuas thiab kuaj mob, pab tiv thaiv kev tsis sib xyaw hluav taws xob thiab kev phom sij.
1. Lub ntsiab lus ntawm rwb thaiv tsev tsis kam
Rwb thaiv tsev tsis kam lees qhov kev tiv thaiv los ntawm insulating cov ntaub ntawv rau kev ntws ntawm ncaj qha tam sim no (DC) thaum muaj voltage yog thov. Nws yog feem ntau ntsuas hauv OHMS (ω) thiab xam siv Ohm txoj cai:
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Qhov twg:
Rr yog rwb thaiv tsev tsis kam,
VV yog cov ntawv thov DC voltage,
II yog qhov xau dej tam sim no los ntawm rwb thaiv tsev.
Cov rwb hauv rwb thaiv tsev tsis kam qhia qhia tau zoo dua insulation zoo thiab qis qis tam sim no.
2. Qhov tseem ceeb ntawm rwb thaiv tsev tsis kam
a. Kev ntsuas cov rwb thaiv tsev rwb thaiv tsev zoo
Rwb thaiv tsev tsis kam ncaj qha cuam tshuam cov xwm txheej ntawm cov ntaub ntawv insulating. Cov kev tawm tsam zoo qhia tau zoo rwb thaiv tsev, thaum lub sijhawm qis tsis kam qhia kev laus, kev paug, lossis kev puas tsuaj.
b. Tiv Thaiv Kev Tiv Thaiv Hluav Taws Xob
Tsawg rawv rwb thaiv tsev tsis kam tuaj yeem ua rau cov dej xau tam sim no, muaj peev xwm ua rau muaj cov voj voog luv luv, arcing, lossis hluav taws kub. Kev xeem tsis tu ncua pab txheeb xyuas thiab chaw teeb meem rwb thaiv tsev ua ntej lawv nce.
c. Ua kom muaj kev ruaj ntseg
Rwb thaiv tsev tiv thaiv yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb ntawm cov khoom siv hluav taws xob. Nws yuav pab txheeb xyuas lub rwb thaiv tsev kev ua dim lossis kev puas tsuaj, tiv thaiv cov khoom siv tsis ua haujlwm thaum lub sijhawm ua haujlwm.
d. Ua raws li cov qauv
Ntau tus qauv thoob ntiaj teb (piv txwv li, iee, IEC, IEEE) yuav tsum muaj cov rwb thaiv tsev tsis kam ua kom ua raws li kev nyab xeeb.
3. Qhov ntau yam cuam tshuam rau kev rwb thaiv tsev
a. Qho so
Qhov kub siab dua txo cov rwb thaiv tsev tsis kam vim sov ua kom muaj kev laus ntawm cov ntaub ntawv insulating thiab nce kev ua haujlwm.
b. Kev vaum
Yuag dej noo xaub voos tsis kam los ntawm kev nce qib ntawm insulating cov ntaub ntawv.
c. Tsis huv
Hmoov av, roj, lossis lwm yam paug ntawm cov rwb thaiv tsev tuaj yeem tsim txoj kev ua kom pom kev, txo cov rwb thaiv tsev tsis kam.
d. Kev ua laus
Lub sijhawm dhau los, insulating cov ntaub ntawv degrade, ua rau kev poob qis hauv rwb thaiv tsev ua haujlwm.
4. Ntsuas rwb thaiv tsev tsis kam
Rwb thaiv tsev tsis kam yog feem ntau ntsuas siv ib qhoRwb thaiv tsev tsis kam mus kuaj(tseem hu ua moeghmeter los yog "megger"). Cov txheej txheem ntsuas yuav:
De -} energizing cov khoom siv: Xyuas kom cov cuab yeej siv tau tag nrho thiab cais los ntawm lwm qhov circuits.
Txuas tus tester: Txuas tus tester qhov kev ua tau zoo thiab qhov tsis zoo rau tus neeg saib xyuas thiab av (lossis chassis) ntawm cov khoom siv.
Ua ntawv thov voltage: Thov siv DC kev ntsuam xyuas voltage (feem ntau 500v, 1000v, lossis 2500v) rau cov khoom siv.
Nyeem cov txiaj ntsig: Sau cov rwb thaiv tsev tsis kam nqi thiab muab piv nrog cov txiaj ntsig txheem.
5. Cov Qauv Cim Rau Rwb Thaiv Tsev Tsis kam
Cov rwb rwb thaiv tau tsis kam lees qhov sib txawv raws li cov khoom siv thiab cov ntawv thov. Qee cov ntaub ntawv uas nquag muaj xws li:
Tsawg - voltage khoom: Feem ntau yuav tsum tau rwb thaiv tsev tsis kam ntawm tsawg kawg1 MΩ.
High - voltage khoom: Yuav tsum muaj rwb thaiv tsev tsis kam ntawm10 MΩlossis siab dua.
Cables thiab xov hlau: Rwb thaiv tsev tsis kam yuav tsum ua tau raws li cov qauv (piv txwv li, iec 60227 lossis iEC 60502) raws li ntev thiab voltage ntsuam xyuas.
6. Cov ntawv thov ntawm rwb thaiv tsev tsis kam kuaj
Rwb thaiv tsev tiv thaiv tau dav siv hauv cov xwm txheej hauv qab no:
Khoom Siv Hluav Taws Xob Khoom Siv Hluav Taws Xob: Kev soj ntsuam ib txwm ntawm cov hloov pauv, lub cev muaj zog, cable, thiab lwm yam khoom siv los xyuas kom muaj kev nyab xeeb.
Txhaum Kev kuaj: Txheeb xyuas rwb thaiv tsev rwb thaiv tsev lossis kev tsis sib haum thaum lub sijhawm daws teeb meem.
Cov cuab yeej tshiab comvioning: Qhia cov rwb thaiv tsev rwb thaiv tsev ua ntej txhim kho cov khoom tshiab.
7. Txhim Kho Rwb Thaiv Tsev Tsis kam
Khaws cov khoom ntxuav: Nquag ntxuav cov khoom siv kom tiv thaiv kev sib kis.
Tswj Vaum: Siv Dehumidifiers lossis dej noo - Cov ntaub ntawv tiv taus hauv ntub dej ib puag ncig.
Niaj hnub tu: Hloov lossis kho cov hnub nyoog lossis cov rwb thaiv tsev puas sai.
Tag
Rwb thaiv tsev tsis kam yog tseem ceeb tseem ceeb rau kev ntsuas kev ua haujlwm ntawm cov ntaub ntawv insulating hauv cov khoom siv hluav taws xob. Kev ntsuam xyuas tsis tu ncua pab kom pom cov teeb meem xws li kev laus, paug, lossis kev puas tsuaj, tiv thaiv kev ua haujlwm hluav taws xob thiab ua kom tsis txhob muaj hluav taws xob. Rwb thaiv tsev tsis kam kuaj yog qhov tseem ceeb ntawm kev saib xyuas hluav taws xob thiab kev kuaj mob, ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov cuab yeej kev ntseeg tau thiab muaj sia ntev.
