Vim li cas thiaj yuav tsum Voltage Transformers Thiab Tam Sim No Transformers Yuav Tsum Tau Ua?

Hauv cov tshuab hluav taws xob, thawj sab ntawm lub tshuab hluav taws xob txuas mus rau siab - cov kab hluav taws xob, thaum lub tshuab hluav taws xob txuas mus rau cov ntsuas ntsuas thiab cov khoom siv tiv thaiv relay, xav tau kev sib cuag los ntawm cov tswv lag luam.

Tiv thaiv High-Voltage Breakdown: Yog hais tias lub rwb thaiv tsev ntawm lub hauv paus thiab theem nrab windings ntawm lub transformer tawg vim kev laus, noo noo, los yog overvoltage, high voltage (xws li, 10kV, 35kV) los ntawm thawj sab yuav ncaj qha mus rau hauv lub thib ob Circuit Court. Hauv qhov xwm txheej no, tag nrho cov khoom siv thib ob thiab cov xaim hluav taws xob yuav nqa cov hluav taws xob txaus ntshai, cuam tshuam ncaj qha rau cov neeg ua haujlwm lub neej.

Kev ua haujlwm ntawm kev tiv thaiv hauv av: Tom qab muaj kev ntseeg siab hauv ib qho kawg ntawm ob sab, thaum muaj qhov siab -voltage surge, ib qho txhaum loj tam sim no yuav nrawm nrawm rau hauv av los ntawm qhov taw tes hauv av, yuam kom clamping qhov hluav taws xob nyob rau sab thib ob rau hauv av muaj peev xwm (piv txwv li, pes tsawg lub peev xwm), yog li xyuas kom cov neeg ua haujlwm sawv hauv av yuav tsis raug hluav taws xob.

Distributed capacitance muaj nyob nruab nrab ntawm lub hauv paus thiab theem nrab windings ntawm ib qho cuab yeej transformer, thiab nruab nrab ntawm lub thib ob winding thiab av. Thaum lub sijhawm ua haujlwm ib txwm muaj, qhov sib faib hluav taws xob ntawm cov peev txheej no yuav ua rau qhov tsis sib haum xeeb thib ob winding los ua kom muaj qhov muaj peev xwm ntab tau txheeb ze rau hauv av, piv txwv li, muaj qee qhov voltage. Txawm hais tias qhov voltage no feem ntau tsis siab, nws tseem tuaj yeem ua rau raug mob rau cov khoom siv hluav taws xob tsis muaj zog lossis cov neeg ua haujlwm hauv qee qhov xwm txheej. Grounding lub thib ob sab tshem tawm qhov ntab muaj peev xwm.

Hauv qee lub tshuab (xws li qis- cov tshuab hauv av tam sim no), qhov nruab nrab ntawm qhov nruab nrab ntawm lub hauv paus ntawm qhov hluav taws xob hloov hluav taws xob muab txoj hauv kev rau lub kaw lus xoom- ntu ntu tam sim no. Qhov no tso cai rau lub rwb thaiv tsev saib xyuas kom raug kuaj xyuas xoom- qhov hluav taws xob sib txuas thiab teeb tsa lub tswb ceeb toom thaum muaj ib qho teeb meem hauv av theem tshwm sim, ceeb toom rau cov tswv lag luam kom daws qhov xwm txheej tam sim.

Txawm hais tias qhov thib ob sab yuav tsum tau grounded, nyob rau hauv ib qho kev sib txuas hauv nruab nrab Circuit Court (xws li, tag nrho Circuit Court los ntawm transformer mus rau chav tswj), tsuas muaj ib tug grounding point.

Yog tias muaj ob lossis ntau lub ntsiab lus hauv av, vim hais tias lub substation grounding grid tsis zoo tag nrho, muaj peev xwm sib txawv yuav raug tsim los ntawm cov ntsiab lus hauv av sib txawv thaum tam sim no loj (xws li luv luv -circuit tam sim no) raug txhaj rau hauv daim phiaj. Qhov no tsim ib qho ntxiv circulating tam sim no nyob rau hauv lub thib ob Circuit Court, ua rau cov ntaub ntawv ntsuas tsis raug thiab txawm ua rau relay tiv thaiv cov cuab yeej ua haujlwm tsis zoo lossis tsis ua haujlwm, ua rau muaj qhov tshwm sim loj.