Tsawg- earthing tam sim no yog tus qauv kev coj ua hauv kev faib khoom ntawm qhov nruab nrab ntawm qhov hluav taws xob ntau: qhov nruab nrab tsis txuas nrog lub ntiaj teb lossis txuas nrog Petersen coil nkaus xwb. Ib qho -theem- rau- hauv av txhaum yog nrog los ntawm qhov txhaum me me; yog li cov kev tiv thaiv tsis tau tawm mus tam sim ntawd thiab lub kaw lus tseem ua haujlwm. Txoj kev no, kev txuas mus ntxiv yog qhov zoo dua, tab sis kev pheej hmoo tsis txaus ntseeg ntau zaus.
Qhov cuam tshuam ncaj qha tshaj plaws yog qhov voltage nce ntawm cov theem tsis raug. Theem voltage yog nqa mus rau kab - mus rau - kab theem. Yog tias rwb thaiv tsev twb tsis muaj zog nyob qhov twg, kev khiav hauj lwm ntawm 1.73 lub sij hawm ib txwm theem voltage rau lub sij hawm ntev yuav ua rau ib tug thib ob av txhaum los yog ib theem - mus rau -theem txhaum. Ntau yam khoom siv tsis ua haujlwm tsis yog tam sim ntawd; rwb thaiv tsev deteriorates maj mam nyob rau hauv overvoltage kom txog thaum tawg.
Yog hais tias ib qho kev sib tshuam arc tshwm sim ntawm qhov chaw txhaum, nws tseem phem dua. Lub arc tuag thiab yog re-tsim dua thiab ntau dua, tsim siab - zaus oscillations nrog rau arcing av overvoltages nrog peaks ntawm ob peb zaug ntawm nominal theem voltage. Xws li overvoltages propagate los ntawm lub system thiab muaj peev xwm nkag mus rau transformers, cable terminations, motor windings, thiab lwm yam khoom siv. Lub arc kuj tso cov kev sib haum xeeb ntawm lub tsheb npav, cuam tshuam VFDs, PLCs, cov khoom siv precision thiab lwm yam khoom hnyav.
Ib qho -theem-rau- hauv av txhaum kuj tseem tsim qhov tsis sib xws thiab qhov tseeb nce hauv xoom- qhov sib txuas voltage. Txawm tias tsis muaj ib qho kev mus ncig ua si, lub zog zoo twb tau degraded. Rau cov khoom siv rhiab heev, qhov tsis sib npaug thiab kev sib haum xeeb tuaj yeem ua rau kev ua haujlwm tsis raug, kaw, lossis cov ntaub ntawv yuam kev. Qee cov txheej txheem tsis tuaj yeem zam qhov xwm txheej ntawd.
Kuj tseem muaj kev nyab xeeb. Cov kauj ruam thiab kov cov peev xwm tuaj yeem nyob ze ntawm qhov txhaum, tshwj xeeb tshaj yog nyob ib puag ncig cov kab nyiaj siv ua haujlwm, cable trenches, thiab cov khoom ntim khoom. Yog tias qhov txhaum nyob hauv ib cheeb tsam uas tib neeg tuaj yeem ncav cuag, qhov phom sij tseem nyob ntev npaum li qhov system tseem muaj zog.
Qhov chaw txhaum yog lwm qhov teeb meem. Vim tias qhov txhaum tam sim no me me, kev tiv thaiv overcurrent tsis tshua muaj haujlwm. Zero- kev faib tawm tam sim no nyob ntawm kab capacitance, yog li kev xaiv feeder yog qhov yuam kev. Kev hloov pauv ntawm phau ntawv qhia yog ncaj qha, tab sis nws luv luv cuam tshuam kev noj qab haus huv feeders thiab cuam tshuam cov txheej txheem tas mus li. Kev kaw cia tsis tu ncua thiab xoom- kev txiav txim raws li kev coj ua kom qhov tseeb qhov chaw.
Ib txoj hauv kev zoo dua yog kev saib xyuas cov txheej txheem thiab qhov chaw ua txhaum sai dua, tsis yog kev tshawb nrhiav tom qab qhov hluav taws xob. Nyob rau theem tsheb npav, xoom- qhov sib npaug ntawm qhov hluav taws xob, qhov hluav taws xob tsis sib npaug, thiab cov ntsiab lus sib haum xeeb tuaj yeem qhia seb puas muaj qhov txhaum hauv av. Ntawm qib feeder, xoom- ntu ntu kev taw qhia tam sim no thiab cov yam ntxwv hloov pauv hloov pauv tuaj yeem txheeb xyuas cov kab tsis raug. Ua ke qhov no nrog Petersen coil them nyiaj lossis qis -kev hloov pauv hauv av ua rau muaj kev txhaum tam sim no thiab overvoltage nyob rau hauv cov kev txwv uas tau txais.
Cov ntsuas hluav taws xob zoo tuaj yeem siv los sau cov ntawv txuas ntxiv peb -theem voltage, xoom-sequence voltage, tam sim no harmonics thiab transient waveforms nyob rau hauv qhov tseem ceeb circuits. Thaum lub xoom- qhov sib npaug ntawm qhov hluav taws xob ntau tshaj qhov ua ntej- teeb tsa los yog hloov pauv loj heev, lub cuab yeej yuav cia li ua rau lub zog ntes thiab sau cov ntaub ntawv ua ntej thiab tom qab qhov tshwm sim. Cov neeg saib xyuas tuaj yeem sib piv cov qauv los txheeb xyuas qhov sib txawv hauv av, kev puas tsuaj ntawm rwb thaiv tsev lossis arcing. Cov cuab yeej no tuaj yeem siv rau hauv cov chaw ua haujlwm substations, ncoo-mounted transformer, chaw cia khoom thiab chaw taws teeb upload kom xa mus rau cov khoom noj tseem ceeb.
Yuav Ua Li Cas Thiaj Tsis Tsis Txaus Siab Theem -rau- Kev Ua Phem hauv av yog tias Lub Tsev Tseem Ceeb Tseem Ua Haujlwm rau Cov Txheej Txheem Tsis Txaus Tam Sim No Yog tias pom ntxov txaus, nws yuav cuam tshuam qhov yooj yim hloov ntawm lub rwb thaiv tsev lossis kev kho cable. Yog tias nws nce mus rau theem - mus rau - theem ua txhaum lossis cov khoom siv tsis ua haujlwm, tus nqi yuav siab dua. Txawm phem dua, kev saib xyuas online tsis hloov kev tiv thaiv; nws muab kev ceeb toom ntxov, thiab pov thawj. Saib xyuas xoom- qhov sib npaug ntawm qhov voltage, qhov tsis sib npaug ntawm qhov tsis sib xws thiab kev sib haum xeeb ntawm lub tsheb npav thiab ntawm cov khoom noj tseem ceeb yog tias koj lub network siv qhov tsis muaj qhov nruab nrab lossis Petersen coil. Feem ntau ib leeg - cov teeb meem hauv av theem tuaj yeem pom ua ntej lawv nce ntxiv.
