Lub luag haujlwm tseem ceeb ntawm RCD (cov khoom siv tiv thaiv qhov seem tam sim no) hauv cov pawg them nyiaj yog txhawm rau tiv thaiv hluav taws xob poob siab, cov khoom siv hluav taws xob xau, thiab hluav taws xob hluav taws xob, nrog rau kev tiv thaiv kev nyab xeeb ntawm lub tsheb hluav taws xob.
RCD, raws li ib hom kev tiv thaiv to, yog siv dav hauv cov tshuab hluav taws xob tsawg. Nws lub luag haujlwm tseem ceeb yog txiav tawm cov khoom siv hluav taws xob los ntawm kev kuaj xyuas cov seem tam sim no hauv Circuit Court, yog li zam kom tsis txhob muaj kev phom sij los ntawm kev xau. Hauv thaj teb ntawmhluav taws xob tsheb them, RCD yog dav siv los ua ib qho yooj yim hluav taws xob tiv thaiv ntaus ntawv, tshwj xeeb tshaj yog nyob rau hauvhluav taws xob tsheb them pawg, qhov twg nws lub luag haujlwm tseem ceeb tshwj xeeb.
Lub hauv paus tseem ceeb ntawm RCD yog xoom kab ke tam sim no transformer, uas yog tiag tiag lub nplhaib-shaped hlau core ua los ntawm Permalloy. Ob theem thiab N xaim hla dhau ntawm cov tub ntxhais hlau, thiab lub ntsuas ntsuas tau raug mob nyob ib puag ncig ntawm cov tub ntxhais hlau. Thaum tam sim no ntawm theem kab thiab N-kab sib npaug ntawm qhov loj thiab qhov sib txawv hauv kev coj, cov kab hlau nplaum tsim tawm hauv cov tub ntxhais hlau tshem tawm ib leeg, thiab tsis muaj cov hlau nplaum sib nqus hauv cov tub ntxhais hlau. Ntawm chav kawm, tsis muaj induced tam sim no nyob rau hauv lub kauj. Lub kauj yuav tsuas yog induce tam sim no thaum theem kab tam sim no tsis sib npaug hauv qhov loj rau N-kab tam sim no. Yog hais tias qhov induced tam sim no tshaj qhov pib ntawm tus nqi ntawm lub accumulator los yog electromagnetic coil, lub xau mus yuav ua tau coj.
Lub xoom kab ke tam sim no transformer hauv RCD yuav tsum dhau los ntawm peb theem kab thiab ib N-kab. Kev sib raug zoo ntawm phasor ntawm peb theem kab tam sim no thiab N-kab tam sim no yog:
Uas yog hais tias, lub phasor ntawm peb theem kab yog sib npaug zos nyob rau hauv loj thiab opposite nyob rau hauv kev coj mus rau lub tam sim no ntawm N-kab.
Yog li thaum cov kab yog qhov qub, cov nqi tso tawm ntawm xoom ntu tam sim no transformer, uas tseem yog qhov seem tam sim no:
Thaum muaj qhov xau tshwm sim, vim yog ib qho ntawm peb theem kab muaj kev xau, phasor sum ntawm peb theem kab tsis sib npaug rau qhov tam sim no ntawm N-kab, ua rau cov seem seem:
RCD paub txog thiab txiav txim siab tias cov dej xau tau tshwm sim, thiab yuav ua rau lub voj voog tawg.
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