Hauv cov tshuab hluav taws xob niaj hnub no, cov hluav taws xob hloov hluav taws xob, ua ib qho tseem ceeb hauv kev hloov pauv, ua lub luag haujlwm tseem ceeb. Lawv tsis tsuas yog pab kom meej qhov ntsuas qhov ntsuas hluav taws xob tab sis kuj tseem muab kev txhawb zog rau kev nyab xeeb thiab ruaj khov ntawm lub zog hluav taws xob.Cia peb saib nws txoj haujlwm ua haujlwm, kev faib tawm thiab cov tswv yim ua haujlwm hauv switchgear.
I. Txoj Cai Ua Haujlwm thiab Kev faib tawm ntawm Voltage Transformers
1. Txoj Cai Ua Haujlwm
A voltage transformer(Potential Transformer, abbreviated li PT) yog lub ntsuas hluav taws xob siv los ntsuas qhov hluav taws xob siab, thiab nws txoj haujlwm ua haujlwm yog raws li electromagnetic induction. Thaum muaj qee qhov hluav taws xob raug siv rau thawj winding ntawm qhov hluav taws xob hloov hluav taws xob, qhov sib txuas hluav taws xob yuav raug cuam tshuam rau hauv qhov thib ob winding. Los ntawm kev hloov pauv kev sib raug zoo, qhov tseeb voltage tus nqi tuaj yeem tau txais.
2. Kev faib tawm
Raws li cov qauv rwb thaiv tsev, qhov hluav taws xob hloov hluav taws xob tuaj yeem muab faib ua roj-immersed voltage transformers thiab qhuav-hom voltage transformers. Roj-immersed voltage transformers muaj kev rwb thaiv tsev zoo thiab kev ua haujlwm kub, thiab tsim nyog rau kev siv hluav taws xob siab; qhuav-hom voltage transformers muaj qhov zoo ntawm me me, lub teeb yuag, thiab yooj yim installation, thiab yog haum rau nruab nrab- thiab tsawg-voltage daim ntaub ntawv.
Raws li transformation ratio hom, voltage transformers yuav muab faib mus rau hauv tus qauv voltage transformers thiab ntsuas voltage transformers. Standard voltage transformers mas yog siv rau kev kuaj thiab nyob rau ntawm qhov chaw calibration; ntsuas voltage transformers yog dav siv nyob rau hauv lub sij hawm saib xyuas ntawm lub hwj chim systems.
II. Muaj nuj nqi ntawm Muaj Peev Xwm Transformers hauv Switchgear
1. Kev ntsuas qhov tseeb
(1) Lub luag haujlwm tseem ceeb ntawm kev hloov pauv hluav taws xob hauv lub tshuab hluav taws xob yog qhov ntsuas qhov ntsuas qhov tseeb. Nrog voltage transformer, kev khiav hauj lwm thiab kev saib xyuas cov neeg ua haujlwm tuaj yeem taug qab cov kab hluav taws xob hluav taws xob hauv lub sijhawm thiab tau txais cov ntaub ntawv txhim khu kev qha rau lub zog xa hluav taws xob thiab kev ua haujlwm.
Voltage fluctuation monitoring: Voltage fluctuation yog ib qho teeb meem tshwm sim hauv cov tshuab hluav taws xob. Kev hloov pauv ntau dhau yuav ua rau kev ua haujlwm tsis zoo ntawm cov khoom siv hluav taws xob. Muaj peev xwm hloov pauv tau saib xyuas qhov sib txawv ntawm qhov sib txawv tsis tu ncua thiab muab lub hauv paus rau kev tswj hwm lub zog kom ruaj khov rau qhov system voltage.
(2) Kev tiv thaiv cov khoom siv: Lub tshuab hluav taws xob muaj peev xwm saib xyuas kev khiav hauj lwm qhov hluav taws xob los tiv thaiv cov khoom puas tsuaj los ntawm qhov txawv txav, xws li kev tiv thaiv overvoltage thiab kev tiv thaiv undervoltage.
(3) Txhim kho lub zog ntsuas qhov tseeb: Thaum siv ua ke nrog tam sim no transformers, muaj peev xwm transformers txhim kho qhov tseeb ntawm hluav taws xob ntsuas hluav taws xob thiab muab cov ntaub ntawv rau kev lag luam ntawm cov phiaj xwm hluav taws xob.
2. Kev ruaj ntseg
Voltage transformers kuj muaj cov hauv qab no kev ruaj ntseg kev ua haujlwm hauv cov khoom faib khoom:
(1) Kev rho tawm hluav taws xob siab: Cov hluav taws xob hloov hluav taws xob cais cov hluav taws xob siab los ntawm cov hluav taws xob tsawg, ua kom muaj kev nyab xeeb ntawm tus kheej ntawm kev ua haujlwm thiab kev saib xyuas cov neeg ua haujlwm thaum ntsuas qhov hluav taws xob.
(2) Tiv thaiv luv luv Circuit Court: Thaum lub caij luv luv tshwm sim, cov hluav taws xob hloov hluav taws xob tuaj yeem txo qhov luv luv tam sim no thiab txo qhov kev puas tsuaj ntawm cov xwm txheej.
Hauv cov khoom siv hluav taws xob, cov hluav taws xob hloov hluav taws xob tuaj yeem saib xyuas qhov hluav taws xob hauv lub sijhawm tiag tiag, teeb tsa lub tswb kom sai thaum pom qhov txawv txav, thiab txo qhov kev pheej hmoo ntawm kev ua tsis tiav.
III. Kev xaiv thiab kev siv ntawm Voltage Transformers
1.Kev xaiv
Thaum xaiv voltage transformers, cov hauv qab no yuav tsum tau xav txog:
(1) Voltage theem: Xaiv qhov sib thooj voltage transformer raws li qib voltage ntawm lub switchgear.
(2) Kev hloov pauv hloov pauv: Xaiv qhov kev hloov pauv tsim nyog raws li kev ntsuas qhov tseeb.
(3) Cov chav kawm raug: Xaiv cov chav kawm raug tsim nyog raws li kev ntsuas qhov tseeb.
(4) Rwb thaiv tsev qauv: Xaiv cov qauv rwb thaiv tsev tsim nyog raws li ib puag ncig ntawm qhov chaw.
2.Daim ntawv thov
Cov kev siv ntawm voltage transformers nyob rau hauv switchgear mas muaj xws li:
(1) Kev saib xyuas hluav taws xob: Saib xyuas daim phiaj hluav taws xob hauv lub sijhawm tiag tiag thiab muab cov ntaub ntawv hluav taws xob rau kev ua haujlwm thiab tu cov neeg ua haujlwm.
(2) Cov cuab yeej tiv thaiv: Koom tes nrog cov khoom siv tiv thaiv relay kom paub txog kev tiv thaiv kev ua haujlwm xws li overvoltage thiab undervoltage.
(3) Kev ntsuas hluav taws xob hluav taws xob: Koom tes nrog cov hloov pauv tam sim no kom paub txog hluav taws xob ntsuas hluav taws xob.
IV. Xaus
Voltage transformers ua lub luag haujlwm tseem ceeb hauv switchgear. Lawv tsis tsuas yog ua kom muaj kev ntsuas qhov tseeb ntawm qhov hluav taws xob, tab sis kuj tseem muab kev txhawb nqa muaj zog rau kev ua haujlwm nyab xeeb thiab ruaj khov ntawm lub zog hluav taws xob. Nrog rau txoj kev loj hlob ntawm lub zog hluav taws xob, daim ntawv thov ntawm qhov hluav taws xob transformers yuav dhau los ua ntau dua. Yog li ntawd, kev nkag siab tob txog kev ua haujlwm, kev xaiv, thiab kev siv cov hluav taws xob hloov hluav taws xob yog qhov tseem ceeb rau kev txhim kho qib kev ua haujlwm ntawm lub zog hluav taws xob.