Cov hlau poob ntawm transformer yog txiav txim siab los ntawm qhov sib nqus flux ceev hauv cov tub ntxhais hlau, thiab cov tooj liab poob yog txiav txim siab los ntawm qhov tam sim no nyob rau hauv winding.
Nyob rau hauv cov ntaub ntawv ntawm tsis muaj load thiab luv luv Circuit Court ntawm lub transformer, lub zog tso zis yog xoom. Lub zog tawm tswv yim dhau los ua qhov poob ntawm lub transformer, uas yog, qhov sib npaug ntawm tooj liab poob thiab hlau poob Yog tias tsis muaj kev thauj khoom, lub zog hluav taws xob tau ntsuas, qhov sib nqus flux ntom ntom ntawm cov tub ntxhais hlau ncav cuag tus nqi ntawm kev ua haujlwm ib txwm muaj, thiab hlau poob kuj yog tus nqi ntawm kev ua haujlwm ib txwm muaj Lub sijhawm no, qhov tam sim no nyob rau hauv qhov thib ob winding yog xoom, thiab tsis muaj tooj liab poob. Tam sim no nyob rau hauv thawj winding tsuas yog qhov excitation tam sim no, uas yog deb tshaj qhov nqi ntawm kev ua haujlwm ib txwm muaj. Cov tooj liab poob los ntawm nws tuaj yeem tsis quav ntsej piv nrog cov hlau poob rau lub sijhawm no, yog li qhov tsis muaj qhov poob tuaj yeem kwv yees li qhov poob ntawm cov hlau. Thaum lub sij hawm luv luv Circuit Court test, lub input fais fab tuag yog luv luv Circuit Court poob Lub sij hawm no, lub hauv paus thiab theem nrab winding tam sim no raug ntsuas, thiab tooj liab poob kuj mus txog tus nqi raws li ib txwm ua hauj lwm, thaum lub voltage yog npaum li cas qis dua qhov ntsuas voltage, thiab qhov sib nqus flux ntom ntom hauv cov tub ntxhais hlau kuj tseem qis dua tus nqi hauv kev ua haujlwm ib txwm muaj. Thaum lub sij hawm no, cov hlau poob yog negligible piv nrog cov tooj liab poob. Yog li ntawd, qhov luv luv Circuit Court poob tuaj yeem suav tias yog tooj liab poob.