Raws li kev lag luam cov ntaub ntawv, lub hnub nyoog nruab nrab ntawm lub hwj chim transformers nyob rau hauv lub tebchaws United States tshaj 40 xyoo, nrog ib tug tseem ceeb feem ua hauj lwm tshaj lawv tsim lifespan. Cov qauv zoo sib xws tau pom hauv Western Europe thiab thaj chaw ntawm Asia. Qhov kev laus laus no ua rau muaj kev pheej hmoo loj ntawm kev poob qis, ua rau muaj hluav taws xob ntau thiab kev lag luam poob.
Luv-Kev ntsuas qhov ntsuas hluav taws xob hauv Circuit Court ua lub luag haujlwm tseem ceeb hauv kev ntsuam xyuas cov tshuab deformation ntawm transformer windings tshwm sim los ntawm -fault tam sim no, tsheb thauj mus los shocks, los yog ntev - lub sij hawm ua hauj lwm kev ntxhov siab. Ib qho kev hloov luv luv - Circuit Court impedance tus nqi siab tshaj 1-3% los ntawm qhov ntsuas lub npe yog suav tias yog ib qho kev ceeb toom tseem ceeb ntawm kev hloov pauv sab hauv winding.
Tam sim no cov neeg siv hluav taws xob thiab kab hluav taws xob tau yuam kom luv luv dua - Circuit Court impedance ntsuas raws li ib feem ntawm lawv cov tswv yim tswj cov cuab yeej cuab tam. Txoj cai thawb no tau nrawm rau kev txais yuav cov khoom siv nqa tau, siab - qhov tseeb luv- Circuit Court impedance testers hauv thaj chaw tu.
IEC 60076 yog tus qauv tseem ceeb thoob ntiaj teb kev tswj hwm lub zog transformer kev sim thiab kev ua tau zoo. Tus qauv txhais cov txheej txheem, kev txwv tsis pub dhau, thiab kev lees txais luv luv - kev ntsuas hluav taws xob impedance tau ua thaum lub Hoobkas kuaj thiab kuaj xyuas qhov chaw.
Raws li IEC 60076-1, qhov kam rau ua rau luv luv-circuit impedance sib txawv los ntawm tus nqi tshaj tawm yog ± 10% rau transformers nrog tus nqi impedance ntawm 10% lossis ntau dua, thiab ± 7.5% rau cov impedance me me ntawm tus thawj coj tapping. Ib qho kev sib txawv dhau ntawm cov kev txwv no yuav qhia tau tias muaj kev hloov pauv hloov pauv, kev puas tsuaj rau lub hauv paus, lossis kev tsim khoom tsis raug.
Cov kev hloov kho tsis ntev los no rau IEC 60076 series kuj tseem suav nrog cov lus qhia tshiab rau kev ntsuas luv luv -circuit impedance ntawm transformers nrog rau ntawm -load kais hloov pauv (OLTCs), yuav tsum tau ntsuas ntawm ntau lub kais dej kom paub meej txog kev kuaj mob.
