Yuav ua li cas siv ib tug multimeter los ntsuas ct polarity
Tam sim no transformer, CT uas yog: tam sim no transformer fais fab system yog dav siv nyob rau hauv electromagnetic tam sim no transformer (tom qab no hu ua tam sim no transformer), nws txoj cai ua hauj lwm thiab transformer zoo ib yam.
Tam sim no transformer yog yus muaj los ntawm: (1) thawj kauj yog kev cob cog rua nyob rau hauv series nyob rau hauv lub Circuit Court, thiab cov lem yog tsawg heev, yog li ntawd, tam sim no nyob rau hauv thawj kauj nyob rau hauv lub load tam sim no ntawm lub Circuit Court nyob rau hauv kev sim. Thiab tsis muaj dab tsi cuam tshuam nrog cov tam sim no theem nrab; (2) cov kauj ruam thib ob ntawm tam sim no transformer txuas nrog qhov ntsuas thiab relay tam sim no coil impedance tsawg heev, yog li nyob rau hauv ib txwm muaj, tam sim no transformer nyob rau hauv lub luv luv-circuit lag luam.
Tam sim no transformer ib lossis ob qhov ntsuas tam sim no, hu ua tam sim no transformer ntsuas kev sib nrig sib inductance piv: kn=I1n/I2n
Vim tias thawj kauj ruam ntsuas tam sim no I1n tau raug tus qauv, qhov thib ob coil ntsuas tam sim no I2n koom ua ke 5 (1 lossis 0.5) A, yog li tam sim no transformer ntsuas kev sib nrig sib inductance piv kuj tau ua qauv. kn kuj tuaj yeem kwv yees li ib qho kev hloov pauv, tus naj npawb ntawm qhov hloov pauv ntawm cov coil thib ob, uas yog, kn ≈ kN=N1 / N2 nyob rau hauv uas cov lej ntawm N1, N2 rau ib lossis ob lub coils.
Lub luag haujlwm ntawm qhov tam sim no transformer yog siv los ntsuas qhov loj tam sim no.
Hauv cov lus layman, yog tias koj xav ntsuas qhov tam sim no ntawm 400A, ces yog tias tsis muaj 400A 'meter' koj yuav tsum ua, yog li koj yuav tsum siv tam sim no transformer, tam sim no yuav loj los ntawm transformer mus rau hauv ib tug me me tam sim no nyob rau hauv lub input meter. , transformer yog ib tug piv, xws li 200/5 yog lub 'meter' 40 npaug, uas yog hais tias, koj 'meter' nyob rau sab saum toj ntawm lub hwj chim, koj tau siv tiag tiag 40 degrees ntawm hluav taws xob, thiab tam sim no transformer yuav siv tau los ntsuas. tam sim no ntawm 400A, tab sis nws tsis yog yuav tsum tau siv lub tam sim no transformer los ntsuas qhov tam sim no ntawm 400A. Muaj ntau theem ntawm transformers, xws li 15/5, 30/5, 30/5, 30/5, 30/5, 30/5, 30/5, 30/5, 30/5, 30/5 thiab 30/ 5. .30/5,,50/5,,75/5,, thiab lwm yam. , , , ,
Txoj hauv kev zoo tshaj plaws los txiav txim siab qhov polarity ntawm transformer rau qhov chaw yog siv lub xov tooj ntawm tes qhuav roj teeb kuj tseem muaj lub pointer multimeter MF47 tuaj yeem muab ntxiv rau cov hlau, qhov ncaj tshaj plaws thiab yooj yim pom qhov pom tseeb, qhov tseeb tuaj yeem ncav cuag ntau dua 90%. , txoj kev yog yooj yim heev Cov thawj sab ntawm lub transformer muaj ib tug P1 P2 tus qauv theem nrab ntau tshaj S1S2 K1K2, thiab lwm yam. yuav txuas mus rau lub P1 thib ob sab ntawm lub zoo electrode txuas mus rau lub zoo electrode ntawm lub S1 tsis zoo electrode txuas nrog rau lwm tus. seem ntawm ob sab txuas ncaj qha, thiab tom qab ntawd siv lub roj teeb los txuas, thiab tom qab ntawd siv lub roj teeb los txiav txim qhov polarity ntawm transformer, thiab tom qab ntawd siv lub roj teeb los txiav txim qhov polarity ntawm transformer. Sab ncaj qha txuas, thiab tom qab ntawd siv lub roj teeb ncaj qha luv luv mus rau thawj sab ntawm lub transformer DC tam sim no, ces koj yuav pom lub multimeter pointer viav vias yog tias nws yog clockwise zoo polarity, counterclockwise uas yog, qhov tsis zoo polarity, qhia tias sab hauv. winding yuam kev, yuav tsum tau soj ntsuam kom meej, vim hais tias lub pointer viav vias tsis loj, tib txoj kev yog pom zoo kom siv ob 1 # roj teeb yog tsim nyog, vim hais tias lub roj teeb yog heev txaus ntshai, thiab sim 10 zaug! Kwv yees li 10 zaus nres ib nrab teev lossis hloov lub roj teeb, vim qhov kev sim thaum lub roj teeb cua sov muaj zog heev, thiab rov pom zoo kom tsis txhob tub nkeeg siv AC lub zog rau hauv 12V 6V uas koj txuag lub roj teeb, tab sis qhov yuam kev nce ntxiv kev ruaj ntseg raug txo.
