Dab tsi yog dielectric lub zog ntawm transformer roj?

TusDielectric lub zog (kev tawg yog voltage)ntawm transformer roj yog antsuas kev ntsuas tseem ceebntawm nws lub peev xwm los ua kom hluav taws xob kev ntxhov siab yam tsis muaj. Ntawm no yog cov ncauj lus kom ntxaws:

Cov txiaj ntsig raug:

Yam tsawg kawg nkaus yuav tsum tau:Feem ntau cov qauv thoob ntiaj teb (zoo li IEC 60156, ASTM D877) xav tau atsawg kawg 30 kv(ntsuas nrog 2.5mm sib txawv ntawm cov hluav taws xob kheej hluav taws xob).

Cov roj tshiab / qub:Tshiab, tshiab,tsis tuaj yeemtransformer roj feem ntau muaj lub zog dielectricZoo saum 60 kV(feem ntau 60-75 kv lossis siab dua). Roj nyob rau hauvkev pabfeem ntau yuav tsum tswjsaum toj 50 kv(Cov kev txwv tshwj xeeb yog nyob ntawm tus hloov pauv ntawm chav kawm voltage thiab cov khoom siv hluav taws xob).

TSEEM CEEB TSEEB TSIM NYEEM (Vim li cas nws txawv ntau):

Cov ntsiab lus noo:Nov yog tusFeem ntau qhov tseem ceeb. Even tiny amounts of dissolved or free water drastically reduce dielectric strength. Dry oil might reach >80 KV, thaum lub sij hawm nyeem roj tuaj yeem poob qis dua 20 kv.

Particulate party:Fibers, av, carbon hais (los ntawm arcing), thiab hlau hais ua txoj kev rau kev tso tawm, puas tsuaj qis dua hluav taws xob.

Acidity & Oxidation Khoom:Raws li cov roj hnub nyoog thiab oxidizes, nws tsim cov kua qaub thiab sludge. Cov kab mob no txo ​​lub zog Dielrictric thiab kev ua kom txias.

Kub:Rhuav tshem voltage feem ntauNce me ntsis nrog kub(Feem ntau 1-2 KV /℃sawv) vim muaj kev txhim kho cov dej solubility hauv cov roj ua kom sov (txo cov dej ntws tawm dawb). Txawm li cas los xij, kev kub siab dhau heev nrawm nrawm nrawm nrawm nrawm.

Txoj Kev Kuaj / Sib Txawv:Qhov kev xeem txheem siv a2.5mm sib txawvnruab nrab ntawm cov qauv kheej hluav taws xob hluav taws xob. Cov txiaj ntsig tau yog qhov siab heev ntawm qhov teeb tsa tshwj xeeb no. Txawv txawv txawv txav tawm cov lus txawv.

Siab:Siab dua nce dielectric zog.

Voltage WaveTsform & Duration:AC kev ntsuam xyuas (zoo li tus qauv 50 / 60Hz) yog tus qauv, tab sis impulse lub zog yog tseem ceeb rau xob laim / surge tiv thaiv.

Vim li cas nws tseem ceeb:

Thawj Infulation:Roj yog lub ntsiab insulating nruab nrab nruab nrab ntawm siab - voltage windings thiab tank, thiab ntawm windings lawv tus kheej.

Arc quenching:Nws pab tua cov arcs uas yuav tsim nyob rau hauv transformer thaum hloov lossis ua txhaum.

Cua txias:Thaum feem ntau rau qhov txias, ua rau lub zog diellectic qhia tias kev sib kis tsis tuaj yeem sib kis uas tseem tuaj yeem cuam tshuam thaum tshav kub hloov.

Qhov taw qhia ntawm kev mob:Dielectric lub zog yog qhov tseem ceeb, niaj hnub sim los saib xyuas qhov kev noj qab haus huv tag nrho thiab cov roj paug ntawm cov roj. Ib qho kev tso tawm sai sai ntawm cov cim ua haujlwm loj lossis kev tsis sib haum xeeb.

Txheej Txheem & Kuaj:

IEC 60156:Cov txheej txheem thoob ntiaj teb rau kev sim ua kom lub zog ua haujlwm ntawm cov kua dej insulating.

ASTM D877:Laus dua, yooj yim dua peb cov qauv (tseem siv, tshwj xeeb tshaj yog rau cov tshev tseem ceeb).

ASTM D1816:Ntau tus qauv niaj hnub no, siv me me (1 hli lossis 2 hli lossis 2mm) VDE sib txawv, uas zoo dua pom cov kuab tsis muaj paug zoo li cov khoom thiab dej. Qhov no feem ntau muab cov nqi qis dua D877 rau tib cov roj tab sis yog cov sawv cev ntau dua ntawm cov hloov pauv.

Cov Specifications Raug:

Cov Roj Tshiab: Often specified >60 kV (D1816, 1mm gap) or >70 KV (ASTM D877).

Hauv -}} Cov Roj Pab:Cov chaw hlauv teeb tsa qhov pib raws li Transformer voltage kawm:

Kev faib khoom xa tawm (piv txwv li,<69kV): Often >25-30 KV (ASTM D877).

Higher Voltage (e.g., 138kV+): Often >45-50 kV (ASTM D1816, 1 hli lossis 2 hli sib txawv).

Hauv cov ntsiab lus:Thaum30 KV (los ntawm cov qauv ntsuas)yog ib qhoYam tsawg kawg nkaus uas tau txaisqhov chaw pib, tustiagdielectric lub zog ntawm transformer roj yog cov sib txawv heev thiab nyob ntawm qhov tseem ceeb ntawm nwsKev nyiam huv thiab Dryness. Fresh oil starts much higher (>60 KV), thiab tswj kom muaj zog siab los ntawm kev saib xyuas kom tsim nyog (kom qhuav, pom kev cia siab thiab muaj sia. Nws tsis yog cov khoom ruaj ruaj ntawm cov roj nws tus kheej, tab sis ib qho khoom ntawm cov rojNyob rau hauv nws tam sim no mob.