Lub hauv paus ntsiab lus ntawm kev ua haujlwm yog tib yam li cov transformer, thiab cov qauv hauv paus kuj yog cov tub ntxhais hlau thiab cov thawj thiab theem nrab windings. Cov yam ntxwv yog tias lub peev xwm me me thiab qhov tsis tu ncua, thiab nws nyob ze rau lub xeev tsis muaj kev thauj khoom thaum lub sijhawm ua haujlwm ib txwm muaj.
Lub impedance ntawm voltage transformer nws tus kheej yog heev me me. Thaum lub thib ob sab yog luv luv, tam sim no yuav nce sharply thiab lub kauj yuav hlawv. Vim li no, thawj sab ntawm lub tshuab hluav taws xob hloov hluav taws xob txuas nrog lub fuse, thiab sab nraud yog kev ntseeg siab hauv av los tiv thaiv tus kheej thiab cov khoom siv sib tsoo los ntawm qhov tshwm sim thaum lub hauv paus thiab theem nrab rwb thaiv tsev puas lawm thiab cov theem nrab muaj peev xwm ua tau zoo. hauv av.
Voltage transformers rau kev ntsuas feem ntau yog ua los ntawm ib-theem ob-coil qauv, thiab thawj qhov hluav taws xob yog qhov ntsuas hluav taws xob (xws li kab hluav taws xob ntawm lub zog hluav taws xob), uas tuaj yeem siv hauv ib-theem, lossis ob lub peev xwm. txuas nrog VV zoo rau peb-theem. siv. Cov hluav taws xob hloov hluav taws xob siv nyob rau hauv lub chaw kuaj mob feem ntau yog siv ntau yam ntawm thawj sab kom tau raws li qhov xav tau ntawm kev ntsuas qhov sib txawv. Lub voltage transformer rau kev tiv thaiv grounding kuj muaj peb kauj, uas yog hu ua peb-coil voltage transformer
Peb-theem peb kauj yog txuas nrog rau hauv daim duab peb sab qhib, thiab ob qho kawg ntawm cov duab peb sab qhib yog txuas nrog lub zog hluav taws xob ntawm cov av tiv thaiv relay.
Thaum lub sijhawm ua haujlwm ib txwm muaj, peb-theem voltages ntawm lub zog hluav taws xob yog qhov sib luag, thiab qhov sib npaug ntawm peb-theem hluav taws xob hluav taws xob hluav taws xob ntawm lub kauj thib peb yog xoom. Thaum cov av ib-theem tshwm sim, qhov nruab nrab ntawm qhov chaw yuav raug tshem tawm, thiab xoom-sequence voltage yuav tshwm sim ntawm cov terminals ntawm qhib daim duab peb sab los ua tus relay act, yog li tiv thaiv lub hwj chim system.
Thaum xoom-sequence voltage tshwm nyob rau hauv lub kauj, xoom-sequence magnetic flux yuav tshwm sim nyob rau hauv cov hlau core. Txog rau qhov kawg no, peb-theem voltage transformer txais ib sab yoke core (thaum 10KV thiab qis dua) lossis peb-theem voltage transformers. Rau hom kev hloov pauv no, qhov tseeb ntawm qhov thib peb kauj tsis yog siab, tab sis nws yuav tsum muaj qee yam kev ua haujlwm dhau los (uas yog, thaum thawj qhov hluav taws xob nce, qhov sib nqus flux ntom ntom hauv cov tub ntxhais hlau kuj nce los ntawm qhov sib txuam ntau yam tsis muaj kev puas tsuaj).
Kev ua haujlwm ntawm lub tshuab hluav taws xob hluav taws xob: hloov cov hluav taws xob siab mus rau hauv tus qauv theem nrab voltage ntawm 100V lossis qis dua hauv kev faib ua feem rau kev siv kev tiv thaiv, ntsuas thiab ntsuas cov cuab yeej. Tib lub sijhawm, kev siv cov hluav taws xob hloov hluav taws xob tuaj yeem cais cov hluav taws xob siab los ntawm cov neeg ua haujlwm hluav taws xob. Txawm hais tias qhov voltage transformer kuj yog ib qho cuab yeej ua haujlwm raws li lub hauv paus ntsiab lus ntawm electromagnetic induction, nws cov qauv electromagnetic kev sib raug zoo yog qhov txawv ntawm qhov tam sim no transformer. Qhov thib ob Circuit Court ntawm lub voltage transformer yog ib tug high-impedance Circuit Court, thiab qhov loj ntawm lub thib ob tam sim no yog txiav txim los ntawm impedance ntawm Circuit Court.
Thaum cov khoom nruab nrab load impedance txo qis, qhov thib ob tam sim no nce, yog li cov thawj tam sim no cia li nce los ntawm ib feem kom txaus siab rau qhov sib npaug ntawm electromagnetic kev sib raug zoo ntawm thawj thiab theem nrab. Nws tuaj yeem hais tias qhov hluav taws xob hloov hluav taws xob yog qhov tshwj xeeb transformer nrog cov qauv siv tsawg thiab siv daim ntawv. Cias muab, nws yog "nrhiav keeb".
Post lub sij hawm: May-04-2022