Hauv lub hwj chim loj, hloov chaw, faib cov kab thiab cov hluav taws xob, qhov loj me, ntawm qhov tam sim no loj heev, los ntawm ob peb amps rau ntau txhiab tus amps. Txhawm rau pab txhawb kev ntsuas, kev tiv thaiv thiab tswj, nws yog ib qho tsim nyog los hloov mus rau txoj kab tam sim no, thiab cov hluav taws xob feem ntau, xws li ntsuas ncaj qha yog qhov txaus ntshai heev. Tus hloov pauv tam sim no lub luag haujlwm ntawm kev hloov pauv tam sim no thiab kev rho tawm hluav taws xob.

Rau tus pointer hom Ammeter, cov thib ob tam sim no ntawm tus hloov pauv tam sim no feem ntau AMPERE {{}}}}, thiab lwm yam). Rau cov neeg siv cov digital me me, ntsuas cov cim ntsuas yog cov zeb feem ntau (0-5v, 4-20mA, thiab lwm yam). Qhov thib ob tam sim no ntawm cov meture tam sim no hloov pauv yog cov zeb, uas feem ntau ua raws li tus choj nyob ntawm tus choj loj thiab ntsuas.

Micro hloov pauv tseem hu ua "Ntsuas Tam Sim No Transformer". ("Ntsuas cov hloov pauv tam sim no" muaj lub ntsiab lus ntawm multi- Txoj kev hloov tshiab tam sim no hloov pauv hauv chav kuaj xyuas tam sim no, uas feem ntau siv los nthuav cov ntsuas ntsuas.)

Cov hloov pauv tam sim no thiab cov hloov pauv tau zoo ib yam li ua haujlwm raws li lub hauv paus ntsiab lus ntawm electromagnetic induction, transformers hloov hluav taws xob thiab hloov pauv hloov tam sim no. Cov winding (naj npawb ntawm lem yog n1) qhov twg cov tam sim no yog ntsuas los ntawm tus hloov pauv tam sim no yog hu ua lub windinging (lossis thawj winding lossis thawj winding); Cov winding txuas nrog kev ntsuas ntsuas (tus naj npawb ntawm lem N2) yog hu ua kev txhaj tshuaj thib ob (lossis theem nrab sab cua).

Qhov kev sib piv tam sim no nruab nrab ntawm thawj winding tam sim no I1 thiab theem nrab transming ua haujlwm ntawm cov rated tam sim no yog hu ua Rated tam sim no ntawm tus hloov pauv tam sim no thiab yog sawv cev los ntawm kn. Kn=i1n / i2n

Txoj haujlwm ntawm tus hloov pauv tam sim no yog hloov dua tshiab nrog tus nqi qis dua los ntawm qee qhov sib piv, uas yog siv rau kev tiv thaiv, ntsuas thiab lwm lub hom phiaj. Piv txwv li, tus hloov pauv tam sim no nrog ib tus piv ntawm 400/5 tuaj yeem hloov qhov tseeb 400a tam sim no mus rau 5A tam sim no.