Yuav ua li cas ntsuas ct polarity nrog multimeter
Tam sim no transformer, CT yog: tam sim no transformer Electromagnetic tam sim no transformer (tom qab no hu ua tam sim no transformer) yog dav siv nyob rau hauv lub hwj chim system, thiab nws txoj kev ua hauj lwm zoo ib yam li cov transformer.
Cov yam ntxwv ntawm lub transformer tam sim no yog: (1) Cov kauj ruam tseem ceeb txuas nrog hauv cov kab hauv Circuit Court, thiab cov kev hloov pauv tsawg heev. Yog li ntawd, tam sim no nyob rau hauv thawj kauj yog nyob ntawm tag nrho cov load tam sim no ntawm lub Circuit Court nyob rau hauv kev sim. Nws tsis muaj dab tsi ua nrog rau qhov thib ob tam sim no; (2) Tam sim no coil impedance ntawm lub ntsuas thiab relay txuas nrog lub kauj thib ob ntawm lub tam sim no transformer yog me me, yog li nyob rau hauv ib txwm muaj xwm txheej, tam sim no transformer ua hauj lwm nyob rau hauv ib lub xeev ze rau ib tug luv luv Circuit Court.
Qhov piv ntawm thawj thiab theem nrab ntsuas tam sim no ntawm lub tam sim no transformer yog hu ua qhov sib nrig sib inductance piv ntawm tam sim no transformer: kn=I1n/I2n
Vim tias qhov ntsuas tam sim no I1n ntawm thawj kauj tau raug qauv, qhov ntsuas tam sim no I2n ntawm lub kauj thib ob yog sib npaug 5 (1 lossis 0.5) ampere, yog li qhov ntsuas kev sib nrig sib inductance ntawm lub tam sim no transformer kuj tau. txheem. kn kuj tseem tuaj yeem hais kwv yees li qhov sib piv ntawm thawj thiab theem nrab coils ntawm transformer, uas yog, kn≈kN=N1/N2 qhov twg N1 thiab N2 yog cov lem ntawm lub hauv paus thiab theem nrab coils.
Lub luag hauj lwm ntawm tam sim no transformer yog ntsuas cov tam sim no loj.
Nyob rau hauv layman cov ntsiab lus, yog tias koj xav ntsuas 400A tam sim no, koj yuav tsum ua li cas yog tias koj tsis muaj 400A watt-teev meter, yog li koj yuav tsum tau siv lub tshuab hloov tam sim no los hloov cov tam sim no loj los ntawm transformer rau hauv me me tam sim no. thiab nkag mus rau lub watt-teev meter. Lub transformer muaj ib tug transformation ratio. Piv txwv li, 200/5 yog 40 npaug ntawm watt-teev meter. Uas yog hais, koj watt-teev meter muaj ib kilowatt-teev hluav taws xob. Qhov tseeb, koj tau siv 40 kilowatt-teev hluav taws xob. Muaj ntau ntau qib ntawm transformers. Muaj 15/5's..30/5,50/5,75/5,,,,,,,,,
Rau lub tshav pob, txoj hauv kev zoo tshaj plaws los txiav txim siab qhov polarity ntawm transformer yog siv lub roj teeb qhuav lossis lub pointer multimeter MF47, ntxiv rau cov hlau, qhov ncaj tshaj plaws thiab yooj yim pom, qhov tseeb tuaj yeem ncav cuag ntau dua 90 feem pua, txoj kev yog yooj yim heev Transformer Sab thawj muaj P1 P2 tus qauv hom, sab ob feem ntau yog S1S2 K1K2, thiab lwm yam. Txuas tus ncej zoo mus rau theem nrab ntawm P1, txuas tus ncej zoo rau S1, txuas tus ncej tsis zoo mus rau lwm qhov, txuas sab thib ob ncaj qha, thiab tom qab ntawd siv lub roj teeb ncaj qha rau cov khoom siv luv luv. Siv DC tam sim no mus rau thawj sab ntawm lub transformer. Lub sijhawm no, koj yuav pom tias yog lub pointer ntawm multimeter swings clockwise, nws yog qhov zoo, thiab counterclockwise yog qhov tsis zoo, qhia tau hais tias lub sab hauv winding yog tsis ncaj ncees lawm. Lub sijhawm no, nws yuav tsum tau saib xyuas kom meej, vim tias lub viav vias ntawm tus taw tes loj, tib txoj kev, nws raug nquahu kom siv 2 1# roj teeb, vim tias ntau lub roj teeb muaj kev phom sij heev, thiab qhov kev sim yuav tsum yuav tsum tau nres ib nrab ib teev los yog hloov lub roj teeb tom qab kwv yees li 10 qhov kev xeem, vim hais tias lub roj teeb kub heev thaum lub sij hawm xeem, thiab nws yog pom zoo kom tsis txhob tub nkeeg mus siv dua lub 12V 6V uas lub alternating tam sim no hloov mus rau hauv xav tias koj txuag. lub roj teeb, tab sis qhov yuam kev nce thiab kev nyab xeeb txo.
