Lub zog ntawm kev sib tham hauv xov tooj yog suav tias yog cov ntshav ntawm lub xov tooj ntawm tes, thaum lub roj teeb tau suav tias yog nws cov ntshav reservoir, tiv thaiv kev ua haujlwm du ntawm lub network. Txawm li cas los xij, kev kho roj teeb ib txwm yog qhov nyuaj. Nrog cov tuam txhab lag luam tsis tu ncua txo tus nqi tom qab kev yuav khoom hauv nruab nrab, cov roj teeb zoo tau poob qis. Txhua xyoo, ntau dua 70% ntawm kev siv hluav taws xob hauv xov tooj tsis ua haujlwm yog vim muaj teeb meem roj teeb, ua rau lub roj teeb kho mob taub hau rau cov neeg ua haujlwm tu. Kab lus no muaj kev tshuaj xyuas ntawm cov laj thawj tseem ceeb ntawm lub roj teeb tsis ua haujlwm, uas tuaj yeem ua qhov siv tau zoo rau lwm tus.
1. On-Site Power Equipment Overview
Cov khoom siv hluav taws xob ntawm qhov chaw muaj ob lub 40kVA UPS los ntawm lub npe nrov thoob ntiaj teb. Cov roj teeb tau teeb tsa hauv xyoo 2016. Hauv qab no yog cov ncauj lus kom ntxaws:
Cov ntaub ntawv UPS |
Cov ntaub ntawv roj teeb |
Hom & Qauv: International Hom UPS UL33 |
Hom & Qauv: 12V 100Ah |
Configuration: 40 kVA, 2 units nyob rau hauv ib tug parallel system, txhua tus nrog ib tug load ntawm kwv yees li 5 kW |
Tus naj npawb ntawm cov roj teeb: 30 hlwb rau ib pawg, 2 pawg, tag nrho 60 hlwb |
Hnub Kawg Ua Haujlwm: 2006 (10 xyoo kev pabcuam) |
Hnub Kawg Ua Ntawv Thov: 2016 (5 xyoos kev pabcuam) |
Thaum Lub Rau Hli 6, UPS cov chaw tsim khoom tau ua haujlwm niaj hnub, hloov AC thiab DC capacitors (5 xyoos kev pabcuam) thiab cov kiv cua. Thaum lub sijhawm kuaj cov roj teeb tawm (20 feeb), nws tau pom tias lub roj teeb qhov kev ua haujlwm tsis zoo. Cov paug tawm tam sim no yog 16A, thiab tom qab 10 feeb ntawm kev tso tawm, qhov hluav taws xob ntawm ntau lub hlwb poob mus rau 11.6V, tab sis tsis pom cov roj teeb bulging.
Nws tau pom tias ob pawg UPS roj teeb muaj teeb meem thaum lub sijhawm tshuaj xyuas. Siv lub multimeter, lawv ntsuas lub roj teeb them ripple voltage (tseem siv lub AC teeb), uas yog siab li 7V (ntau tshaj tus qauv tu). Raws li qhov tshwm sim, lawv thawj zaug xav tias DC lim capacitors hloov los ntawm UPS cov kws tsim khoom ua haujlwm ua haujlwm tsis raug, ua rau muaj qhov hluav taws xob ntau dhau ntawm UPS lub tsheb npav DC, ua rau lub roj teeb bulging.
2. On-Site Failure Situation
Thaum Lub Xya Hli 22, pab pawg los ntawm Lub Tsev Haujlwm Tshawb Fawb tau tshawb xyuas kev nyab xeeb ntawm ib ceg haujlwm. Lawv pom tias cov roj teeb ntawm UPS cov tshuab nyob rau hauv 5th pem teb ntawm ib lub tsev tau tawg loj heev. Yog tias muaj hluav taws xob tawm ntawm daim phiaj, nws tau ntshai tias cov roj teeb yuav tsis tso tawm kom zoo, uas yuav ua rau muaj kev sib tsoo. Raws li qhov tshwm sim, lawv tau pom zoo tam sim ntawd kom cov ceg ntoo tu cov neeg ua haujlwm hu rau cov chaw tsim khoom cov kws tsim khoom los npaj kev sib koom ua ke ntawm qhov chaw tshawb nrhiav thiab kev daws teeb meem nrog rau tag nrho peb tog tom qab tav su.
Bulging ntawm 12V roj teeb
Thaum tav su ntawm Lub Xya Hli 23, peb tog tuaj txog ntawm qhov chaw. Thaum kuaj xyuas, ob qho tib si UPS tau pom tias ua haujlwm ib txwm muaj, nrog rau qhov hluav taws xob ntab ntawm kwv yees li 404V rau cov roj teeb (nyob rau hauv kab nrog cov teeb tsa tsis muaj). Cov kws tsim khoom siv hluav taws xob siv Fluke 287C multimeter (siab raug) los ntsuas lub roj teeb them ripple voltage, uas yog kwv yees li 0.439V. A Fluke 376 clamp meter (tsawg dua) ntsuas nyob ib ncig ntawm 0.4V. Cov txiaj ntsig tau los ntawm ob qho khoom siv tau zoo sib xws thiab poob rau hauv qhov raug ripple voltage ntau rau cov khoom siv (feem ntau tsawg dua 1% ntawm lub tsheb npav voltage). Qhov no qhia tau hais tias cov hloov DC capacitors tau ua raws thiab ua haujlwm zoo li qub. Yog li ntawd, qhov kev xav yav dhau los xav tias qhov hloov pauv capacitor ua rau muaj qhov hluav taws xob ntau dhau thiab cov roj teeb bulging raug txiav tawm.
Multimeter: 0.439V
Clamp meter: kwv yees li 0.4V
Kev tshuaj xyuas ntawm UPS cov ntaub ntawv keeb kwm qhia tau hais tias, thaum Lub Rau Hli 6, ob qho tib si UPS tau ua tiav qhov kev sim roj teeb 15 feeb. Tom qab rov kho qhov hloov pauv lub zog tseem ceeb, 6-feeb sib npaug sib npaug tau ua tiav, ua raws li 14-feeb roj teeb tso tawm los ntawm cov kws tsim khoom tsim khoom. Tom qab qhov kev sim, UPS system cia li pib ua plaub sib law liag 12-teev sib npaug, nrog rau txhua theem sib cais los ntawm 1-feeb ib ntus, xaus ntawm 5: 32 teev sawv ntxov rau Lub Rau Hli 9. Txij thaum ntawd los, cov roj teeb tseem nyob hauv hom ntab nqi.
Kev tshuaj xyuas ntxiv ntawm thawj qhov teeb tsa UPS roj teeb tau qhia cov hauv qab no:
Lub roj teeb lub neej tau teem rau 48 lub hlis (4 xyoos), txawm hais tias lub neej expectancy ntawm 12V roj teeb yuav tsum yog 5 xyoo.
Kev them nyiaj sib npaug tau teeb tsa rau 'enabled.'
Tus nqi tam sim no txwv tau teem rau 10A.
Lub cim rau kev hloov mus rau qhov sib npaug sib npaug tau teeb tsa rau 1A (lub kaw lus yuav hloov mus rau qhov sib npaug sib npaug yog tias tus nqi ntab tam sim no tshaj 1A, txawm tias tus nqi qub rau cov qauv no yog 0.03C10 ~ 0.05C10, txhais tau hais tias qhov sib npaug sib npaug tau tshwm sim thaum lub ntab them nqi tam sim no nce mus txog 3-5A. Txawm li cas los xij, rau qhov tsis paub txog cov neeg ua haujlwm 10 C10. lub ntsiab lus sib npaug sib npaug yuav tshwm sim thaum tus nqi ntab tam sim no mus txog 1A).
Lub sijhawm tiv thaiv kev them nyiaj sib npaug tau teem rau 720 feeb (kev sib npaug sib npaug yuav nres tau tom qab 12 teev).
3. Kev tshuaj xyuas qhov ua tsis tiav
Raws li cov xwm txheej saum toj no, cov txheej txheem tsis ua haujlwm tuaj yeem txheeb xyuas raws li hauv qab no:
Ob pab pawg roj teeb ntawm UPS no tau siv rau 4 xyoo (lub neej kev pab cuam ntawm 12V roj teeb yog 5 xyoos), thiab lub peev xwm roj teeb tau poob qis. Txawm li cas los xij, ua ntej qhov tsis ua haujlwm, lub roj teeb sab nraud zoo li qub, tsis muaj cov cim qhia ntawm bulging. Kev tshuaj xyuas ntxiv ntawm UPS cov ntaub ntawv keeb kwm txij thaum Lub Ib Hlis 30, 2019 (cov ntaub ntawv ua ntej hnub no tau raug tshem tawm) txog rau Lub Rau Hli 6, 2020, pom tias UPS system tau ua 12 qhov sib npaug sib npaug, nrog lub sijhawm ntev tshaj plaws tsis pub tshaj 15 feeb. Qhov no qhia tau hais tias qhov sib npaug ntawm lub sijhawm them nyiaj hauv UPS ua ntej kev saib xyuas yog luv luv, tsuas yog 15 feeb xwb, thiab UPS qhov kev sib npaug ntawm lub sijhawm luv luv yuav tsis ua rau cov roj teeb bulge.
Tom qab kev kho thiab hloov capacitor, UPS system tau rov pib dua. Lub logic tswj tau txheeb xyuas lub roj teeb raws li kev sib txuas tshiab, yog li nws pib them 6-feeb sib npaug thiab tom qab ntawd hloov mus rau tus nqi ntab. Txawm li cas los xij, tom qab 14-feeb tso tawm tom ntej, UPS system cia li pib sib npaug sib npaug kom them rov qab cov roj teeb. Vim tias cov roj teeb siv tau 4 xyoos, lawv cov peev txheej hauv kev khaws cia tau ua tsis zoo, ua rau cov nqi ntab tam sim no ntau dua 1A, ua rau 1A sib npaug ntawm cov nqi them pib teeb tsa hauv UPS system (tus nqi qub rau cov qauv no yog 3 ~ 5A ntab nqi tam sim no los ua kom sib npaug sib npaug, tab sis rau qee yam, cov neeg ua haujlwm kho 1A tau hloov kho). Qhov no ua rau UPS system rov pib qhov sib npaug sib npaug kom txog thaum lub roj teeb sab hauv qhib qhov hluav taws xob thaum kawg nres nws (Lwm yam, UPS system yuav tau txuas ntxiv sib npaug sib npaug, uas tuaj yeem ua rau pawg roj teeb ntes hluav taws). Nyob rau lub sijhawm no, cov roj teeb tau ua plaub zaug sib npaug sib npaug li 48 teev (txhua lub voj voog nres tsuas yog 1 feeb txhua 12 teev ua ntej rov pib them nyiaj sib npaug). Tom qab xws li kev sib npaug sib npaug sib npaug, cov roj teeb nws thiaj li tsim bulging, thiab txawm tias lub venting li qub tau deformed.
4. Xaus
Raws li kev soj ntsuam thiab kev soj ntsuam saum toj no, qhov ua rau lub roj teeb tsis ua haujlwm hauv UPS system yog raws li hauv qab no:
Qhov laj thawj ncaj qha yog qhov teeb tsa tsis raug ntawm UPS qhov kev them nyiaj tsis raug, uas ua rau muaj kev sib npaug sib npaug rau 48 teev nrog tsuas yog 1-feeb luv luv ntawm txhua lub voj voog. Txawm tias cov roj teeb tshiab yuav tsis tuaj yeem ua rau lub sijhawm ntev thiab sib npaug sib npaug, ua rau lub roj teeb tsis ua haujlwm hauv qhov no.
Tus qauv UPS yog ib qho qauv tsim thaum ntxov nrog kev txwv kev ua haujlwm. Cov qauv UPS qub no (tsim 20 xyoo dhau los) tsis muaj qhov ' sib npaug ntawm lub sijhawm tiv thaiv lub sijhawm' teeb tsa (lwm lub npe feem ntau teem caij rau 7 hnub), uas ua rau muaj ntau yam sib npaug sib npaug.
Cov roj teeb qhov kev ua tau zoo tau poob qis vim muaj hnub nyoog (4 xyoos hauv kev pabcuam), nrog txo qis kev tso tawm thiab kev tuav tsis zoo. Ua ntej Lub Rau Hli 6, qhov sib npaug-rau-float-them hloov pauv tam sim no tau teeb tsa tsis tsim nyog (tsuas yog 1A rau 100Ah roj teeb). UPS system tus nqi pib yog 3 ~ 5A, tab sis cov neeg ua haujlwm saib xyuas inexplicably hloov nws mus rau 1A.
UPS system tau ua haujlwm rau 14 xyoo, zoo tshaj nws lub hnub nyoog decommissioning, ua rau kev ntsuas tsis raug. Cov kev ua yuam kev no yuav ua rau lub kaw lus rov pib sib npaug sib npaug vim qhov tsis raug tam sim no nrhiav pom.
Hmoov zoo, qhov qhib Circuit Court nyob rau hauv ib qho ntawm cov roj teeb lub hlwb tiv thaiv UPS system los ntawm kev txuas ntxiv qhov sib npaug ntawm kev them nyiaj rov qab tom qab plaub qhov sib npaug sib npaug, yog li zam lub peev xwm rau cov roj teeb kom tua hluav taws.
5. Kev kho mob rau qhov ua tsis tiav
Cov kev kho mob muaj xws li ob yam:
Ua ntej, hloov pauv ib ntus ntawm UPS roj teeb them tsis tau:
Disable qhov sib npaug ntawm kev them nqi hauv UPS system.
Kho qhov cuam tshuam tam sim no rau kev hloov ntawm cov nqi ntab mus rau qhov sib npaug ntawm kev them nyiaj rau 3A (txawm tias 3A tseem qis me ntsis, vim qhov tsawg kawg nkaus yog 3A, tab sis yav dhau los nws tau teem rau 1A).
Kho qhov sib npaug ntawm kev tiv thaiv lub sijhawm rau 1 teev (yav tas los teem rau 12 teev).
Qhov thib ob, lub chaw haujlwm ceg tau hloov ob pawg roj teeb nrog cov roj teeb thaub qab, tab sis cov roj teeb thaub qab muaj peev xwm tsuas yog 50 Ah, yog li lawv tsuas siv tau rau lub hom phiaj xwm txheej kub ntxhov ib ntus xwb. Muaj cov phiaj xwm hloov cov khoom thauj los ntawm UPS system mus rau lwm qhov chaw siv hluav taws xob yav tom ntej, txhawm rau daws cov teeb meem kev nyab xeeb ntawm lub hwj chim.
Tus neeg teb xov tooj siv nyiaj ntau txhua xyoo rau kev saib xyuas rau UPS system, tab sis vim kev tsis saib xyuas thiab tsis saib xyuas ntawm cov neeg ua haujlwm tu, lawv txawm hloov pauv qhov tsis raug ntawm UPS system, uas yog qhov tsis txaus ntseeg tiag tiag. Nws raug pom zoo tias UPS cov chaw tsim khoom siv kev saib xyuas lawv cov khoom tiag tiag thiab tsis txhob ua qhov yuam kev yooj yim yav tom ntej, txhim kho lawv cov kev pabcuam tu kom zoo. Lub caij no, nws tau hais tias tus neeg teb xov tooj kuj tau ua tib zoo saib xyuas cov kev pab cuam tom ntej los ntawm UPS cov chaw tsim khoom thiab tsim kom muaj kev ntsuam xyuas txuas ntxiv txhawm rau txhim kho kev nyab xeeb thiab txhim khu kev qha ntawm UPS system.
