Transformers yog lub caj qaum ntawm fais fab faib cov tshuab, thiab lawv txoj kev ntseeg tau yooj yim ntawm cov kev daws teeb meem zoo - tshwj xeeb tshaj yog nyob rau hauv lub tsheb loj-prone puag. Rau me rau nruab nrab hloov pauv, tsim tau zoo ua rau kev nyab xeeb ua haujlwm tab sis kuj mitigates qhov cuam tshuam loj ntawm xob laim thiab surges surges. Hauv cov blog no, peb tsoo cov qauv tsim tseem ceeb rau kev tsim kho cov tshuab grounding zoo.
1. Nkag siab lub luag haujlwm ntawm kev tiv thaiv xob laim
Xob laim cov lus Indikes Indtuce Transient voltages thiab cov dej ntws uas tuaj yeem rhuav tshem cov khoom rwb thaiv tsev hloov chaw thiab cov cuab yeej sib txuas. Ib txoj kev tsim tsim tau zoo:
Dissipates nthwv hluav taws xobmuaj kev nyab xeeb rau hauv lub ntiaj teb.
Sib npaug muaj peev xwmthoob plaws lub kaw lus kom tiv thaiv kev ua arcing.
Cov thaiv thaiv cov khoom tseem ceebLos ntawm Electromagnetic cuam tshuam (EMI).
2. Cov qauv tsim qauv rau transformer grounding tshuab
A. Txoj kev tsis tshua muaj siab
Lub hom phiaj tsis kam: Tsom rau hauv av tiv taus tsawg dua lossis sib npaug rau 5 ω (ib tus qauv ntawm IEE). Cov khoom seem qis ua kom muaj kev cuam tshuam nrawm nrawm ntawm cov neeg txhaum.
Cov Av Tiv Thaiv Kev Xeem: Kev kuaj av av los txiav txim siab tiv taus tawm tsam thiab offective electrode chaw (piv txwv li, cov kab ntsug ntsug, kab rov tav grob).
B. Kev Xaiv Hluav Taws Xob Xaiv Tsev
Ntaub ntawv: Siv cov corrosion-resistant electrodes (tooj liab-bonded lossis galvanized steel).
Qhov tob & spacing: Nruab cov tshuaj electrodes tsawg kawg yog 3 meters sib sib zog nqus thiab tau ntev 2 x lawv ntev kom tsis txhob muaj kev sib tw aav.
Kev Xyaum Tshuab: Rau cov kev hloov pauv, muab cov kab ntsug ntsug nrog cov kab rov tav kom tsim cov kab rov tav uas tsis muaj zog.
C. Kev Ua Haujlwm & Cov Zauv Hluav Taws Xob
BRDENCATION Txhua yam xim hlau (hloov chaw ntawm lub taub ultrasonic, qhov chaw nruab nrab, ploj mus) mus rau cov phiaj xwm av kom tshem tawm cov kev sib txawv.
Txuas ntxiv daim phiaj rau cov qauv nyob ze (piv txwv li, cov laj kab, tswj vaj huam sib luag) kom tiv thaiv kauj ruam-thiab-kov voltage txaus ntshai.
D. Surge Tiv Thaiv Kev Sib Tw
Muab ciaXob laim ntes(piv txwv li, cov roj av hlau-oxide) ntawm Transformer thawj cov lus qhia tseem ceeb thiab theem nrab.
Kev sivShielded cablesthiab surge-tiv thaiv cov cuab yeej (SPDS) rau theem nrab ntawm cov voj voog.
3. Xob laim tsim kev txhim kho tsim tshwj xeeb
Counterteroise grounding: Depool muab counterpaise tus cees saib ib ncig ntawm transformer los cuam tshuam thiab rov qab xob laim xob laim.
Ntiv Nplhaib Kev Lag Luam: Tsim ib lub voj voos kaw-voj voos nyob ib ncig ntawm lub transformer rau kev faib tawm tam sim no.
Voltain Soltression: Khib grounding nrog roj hlab ou roj lossis cov khoob khoob rau ntau qhov kev tiv thaiv ntau theem.
4. Ua raws li & kuaj
Tus qauv: Vim li cas rau ieee 80, iec 62305, thiab nec tsab xov xwm 250 rau kev tsim av.
Kev saib xyuas ib txwm: Kuaj hauv av tiv taus txhua xyoo thiab tom qab cov txheej xwm huab cua loj. Siv clamp-on cov tub kuaj sim rau cov tshev system nyob.
5. Kev Kawm Kev Cai: Hauv paus rau 500 KVA Cov Khoom Lag Luam Transformer
Ib qho project tsis ntev los no rau kev yuav khoom ntawm lub khw muag khoom:
Txhim kho qhov 12- rod ntsug electrodode array nyob rau hauv qis-resistivity av.
Ua raws txoj kev hloov pauv hloov mus rau cov tooj liab Caws nrog cov kws kho mob exothermic explay.
Kev sib xyaw Chav Kawm 1 Surge ntes ntawm 11 kV kab.
Qho kawg: Cov chaw xa tawm, hauv av tiv thaiv tau 3.2 ω, thiab xoom xob laim tsis muaj kev ua tiav hauv 2 xyoos.
Cov Lus Nug: Cov lus teb sai rau cov engineers
Q1. Kuv puas tuaj yeem siv ib qho av ntawm av rau 100 KVA transformer?
Tsis muaj. Ntau tus pas nrig ({{3+), sib txuas lus nyob rau hauv parallel, yog tsim nyog kom ua tiav cov impedance.
Q2. Av hom yuav cuam tshuam li cas hauv av?
Av nplaum lossis loam (tsis muaj kev tiv thaiv) yog qhov zoo tagnrho. Rau cov av muaj pob zeb, siv tshuaj lom neeg hluav taws xob lossis backfill nrog bentonite.
Q3. Dab tsi yog lub neej ntawm lub tsev hauv av?
20-30 xyoos nrog cov khoom siv corrosion-resistant cov ntaub ntawv thiab kev tshuaj xyuas ib txwm muaj.
Tag
Lub teeb hluav taws xob-resilient grounding system rau me rau nruab nrab hloov pauv rau kev tsim qauv, thiab ua raws li cov qauv hauv ntiaj teb. Los ntawm kev tiv thaiv qis dua, cov kev tiv thaiv kev nyab xeeb, thiab kev tiv thaiv kev ntxhov siab, koj tiv thaiv ob qho tib neeg thiab tib neeg lub neej-thaum tsis tshua muaj nuj nqis.
Xav tau kev pab kev pab?Hu rau peb pab neeg tsim kev tsim kho cov kev cai daws teeb meem rau koj lub transformer cov kev xav tau.