Vim li cas thiaj ua rau lub zog tshwm sim thaum hloov hluav taws xob kaw cov kev sim?

Txim taws los yog arcing thaum lub sijhawm hloov pauv impluse kaw cov kev xeem ntawv yog feem ntau cuam tshuam nrog cov kev ua haujlwm ntawm lub cev thiab kev ua haujlwm hauv qab no. Cov laj thawj yog tshuaj ntsuam hauv qab no nyob rau hauv cov xwm txheej sib txawv:

 

1. Cov txheej txheem hloov pauv thaum kaw tam sim no: Surge tam sim no & Electromagnetic Zog

Tam sim no nyob rau hauv: Thaum lub sij hawm impulse kaw, lub tshuab hloov hluav taws xob yog qhov ua kom muaj zog, ua rau muaj qhov tam sim no los ntawm xoom kom muaj nuj nqis. Lub ncov inrush tam sim no tuaj yeem ncav cuag 6-8 zaug qhov ntsuas uas muaj nyob tam sim no. Xws li cov zaus ntau zaus, siab-amplitude tam sim no hloov pauv tej zaum yuav ntxias cov txim taws ntawm:

Hloov mus rau qhov khoob: Neeg kho tshuab cov khoom siv (piv txwv, cov kab ke sib txuas) tuaj yeem tsim kev sib cuag luv luv vim muaj kev sib chwv, lossis kev sib chwv ntau zaus ua rau cov hlau vapor ionization thaum kaw.

Kev Tso Cai Siv Lub Chaw Sib Txuas: Siab tam sim no los ntawm oxidized lossis tsis zoo txuas cov terminals tuaj yeem ceev ceev nce kev sib chwv, ua rau lub txim taws.

Piv txwv li: Cov neeg ua haujlwm uas muaj hnub nyoog muaj hnub nyoog tsis txaus yuav ua rau muaj kev sib chwv tau zoo li asynchronous kaw, nrog cov nplaim taws thiab popping suab.

 

2. Insulation tsis xws luag lossis ib nrab tawm

Sab hauv rwb thaiv tsev tsis muaj zog: Rwb thaiv tsev flaws (xws li, cov roj hnub nyoog, npuas, cov paug) tsim cov hluav taws xob hauv zos siab hauv qab, ua rau muaj kev cuam tshuam hluav taws xob hauv zej zog. Tej zaum yuav raug pom ntawm bushings lossis tank sib koom tes, nrog cov suab hsissing, ozone tsw, lossis cim infrared / ultrasonic paib. Cov xwm txheej hnyav yuav nce mus rau rwb thaiv tsev tawg.

Nto Mus Txog: Bushings lossis cov dej noo tuaj yeem tsim cov kev xau tam sim no los ntawm cov chaw nyob ntawm thaj chaw, ua rau cov kiav txhab loj. Kev Ua Haujlwm Saib Xyuas: Huv Si lossis Hloov Cov Khoom Siv Rwb thaiv tsev.

 

3. Hauv Intruction & Txee Ntsig Hluav Taws Xob Yuam Kev (EMF)

Thib Ob Lub Circuit Court cuam tshuam: Tsis txhob txwm ua tsis tau cov ntaub ntawv sib txuas lus theem nrab (piv txwv li, meters) thaum kuaj cov hluav taws xob siab tshaj plaws vim yog kev hloov pauv thawj zaug. Kev sib txig yuav tshwm sim ntawm cov khoob lossis cov neeg sib cav sib ceg.

Cov Qauv: {= {= l⋅dtdi (siab dua 𝑑𝑖𝑑𝑡dtdi nce voltage).

Piv txwv li: Qhib-Circuiting Tam Sim No Transformer (CT) Cov chav kawm theem nrab uas muaj peev xwm ua kom cov Kilovolt-qib EMF, ua rau muaj kev ua txhaum thiab khoom siv.

 

4. Cov av tsis zoo lossis ntab

Faulty grounding: Xoob nruab nrab-taw tes lossis tank av ua tus nqi them nqi, ua rau hauv av tso tawm (ua rau hauv av tsis muaj txiaj ntsig, piv txwv li, nws cov tshuab). Txheeb xyuas cov hauv paus tsis kam (tsawg dua los yog sib npaug rau 4 ω).

Tshuaj ntsuam xyuas: Faib pom kev nyab xeeb ntawm windings windings windings windings hauv av hauv qab hluav taws xob yuav tsim hluav taws xob hloov chaw. Impedance mismatches tuaj yeem ua rau muaj kev rho tawm hauv ib cheeb tsam.

 

5. Txawv ib txwm tshwm sim zoo tshaj plaws vs. kev ua txhaum

Ib txwm hloov chaw: Millisecond-teev cov arcs me (piv txwv li, thaum kaw kaw) yam tsis muaj kev tawm tsam lossis tsis sib xws; Tsis muaj kev nqis tes ua.

Txhaum cov ntsuas: Kaw tam sim ntawd yuav tsum yog tias cov txim taws nrog:

Nruam cov suab nrov / hlawv cov ntxhiab

Kev Tiv Thaiv Kev Txhim Kho (piv txwv li, plawg, Buchholz)

Abnormal dissolved gas analysis (DGA), e.g., elevated 𝐶2𝐻2C2​H2​ (>1 μL/L).

 

Lus pom zoo

Hloov Kho: Ua kom cov neeg sib chwv, cov kev sib tw kom zoo, thiab kho cov kev khiav haujlwm sai rau cov kab ke sib xyaws / Disconnectors.

Rwb thaiv tsev kuaj: Ua kev kuaj mob ua ntej / kev tawm tsam (winding tiv thaiv, rwb thaiv tsev tsis kam, tanΔ, ib nrab tso tawm).

Pov Thawj Ua Si: Ntsuas nruab nrab-taw tes thiab tank av kuj tsis kam tshem tawm cov peev xwm ncaws pob.

Kev tswj hwm ib puag ncig: Ua kom muaj kev ntsuas kom qhuav (av noo<80%) and avoid contamination.