Yuav ua li cas ntsuas qhov polarity ntawm CT siv lub multimeter
Tam sim no transformer, CT: tam sim no transformer Electromagnetic tam sim no transformer (tom ntej no hu ua tam sim no transformer) yog dav siv nyob rau hauv lub hwj chim systems. Nws txoj haujlwm ua haujlwm zoo ib yam li lub tshuab hloov pauv.
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, qhov tam sim no nyob rau hauv thawj kauj yog nyob ntawm qhov load tam sim no ntawm 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 lub luv luv-circuit xeev.
Qhov piv ntawm thawj thiab theem nrab ntsuas tam sim no ntawm 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 lub hauv paus kauj tau raug tus qauv thiab qhov ntsuas tam sim no I2n ntawm lub kauj thib ob yog sib koom ua ke rau 5 (1 lossis 0.5) A, qhov ntsuas kev sib nrig sib inductance ntawm qhov tam sim no transformer kuj tau. txheem. kn kuj tuaj yeem hais kwv yees li qhov sib piv ntawm thawj thiab theem nrab coils ntawm lub transformer, uas yog, kn≈kN=N1/N2, qhov twg N1 thiab N2 yog tus naj npawb ntawm cov lem ntawm thawj thiab theem nrab coils. .
Lub hom phiaj ntawm lub transformer tam sim no yog ntsuas cov tam sim no loj.
Nyob rau hauv cov lus layman, yog tias koj xav ntsuas 400A tam sim no, koj yuav ua li cas yog tias koj tsis muaj 400A watt-teev meter? Yog li koj yuav tsum tau siv lub tam sim no transformer los hloov cov tam sim no loj rau hauv ib qho me me tam sim no los ntawm transformer thiab nkag mus rau hauv lub watt-teev meter. Transformers muaj qhov sib txawv ntawm qhov sib txawv. Piv txwv li, 200/5 yog 40 npaug ntawm watt-teev meter. Hais tias yog, koj lub watt-teev meter muaj ib kilowatt teev, tab sis koj tau siv 40 kilowatt teev. Muaj ntau theem ntawm transformers. Muaj 15/5...30/5,50/5,,75/5,,,,,,,,,,
Txoj hauv kev zoo tshaj los txiav txim siab qhov polarity ntawm transformer ntawm qhov chaw yog siv lub roj teeb qhuav lossis analog multimeter MF47. Ntxiv cov xov hlau yog qhov ncaj nraim thiab pom yooj yim tshaj plaws. Qhov tseeb tuaj yeem ncav cuag ntau dua 90%. Txoj kev no yooj yim heev. Thawj sab muaj P1 thiab P2, thiab cov txheej txheem thib ob feem ntau yog S1S2, K1K2, thiab lwm yam. Txuas cov electrode zoo rau P1. Qhov zoo electrode ntawm ob sab yog txuas nrog S1. Qhov tsis zoo electrode txuas nrog rau lwm ntu. Qhov thib ob sab yog txuas ncaj qha, thiab tom qab ntawd lub roj teeb ncaj qha luv luv. Thaum DC tam sim no siv rau thawj sab ntawm lub tshuab hloov pauv, koj yuav pom tias tus pointer ntawm multimeter swings clockwise, uas zoo heev, thiab counterclockwise, uas txhais tau hais tias tsis zoo polarity. Qhov no qhia tau hais tias lub internal winding yog tsis ncaj ncees lawm. Lub sijhawm no, koj yuav tsum tau ua tib zoo saib xyuas, vim tias lub viav vias ntawm tus taw tes tsis loj, nws raug nquahu kom siv 2 1# roj teeb rau tib txoj kev, vim tias muaj ntau lub roj teeb txaus ntshai heev, thiab qhov kev sim yuav tsum yuav tsum tau nres rau ib nrab ib teev los yog lub roj teeb yuav tsum tau hloov tom qab li ntawm 10 lub sij hawm, vim hais tias lub roj teeb heats ntau heev thaum lub sij hawm xeem. Ib zaug ntxiv, nws raug pom zoo kom tsis txhob tub nkeeg siv nws. Qhov hloov pauv tam sim no hloov mus rau 12V 6V, uas txhais tau tias koj txuag lub roj teeb, tab sis qhov yuam kev nce thiab kev nyab xeeb txo.
