I. Hluav taws xob tiv tauj yuam kev
Hom kev txhaum no yog qhov teeb meem nquag tshaj plaws hauv siab -voltage switchgear. Qhov laj thawj tseem ceeb yogKev tiv thaiv siab heev ntawm kev sib txuas ntawm tus neeg xyuas pib, uas yog nquag ua rau lub zos overheating thiab txawm ablation los yog luv luv Circuit Court nyob rau hauv mob hnyav.
Common Phenomena
Qhov ntsuas kub hauv cheeb tsam ntawm lub switchgear txee yog siab dhau lawm, thiab qhov ntsuas kub infrared qhia tau hais tias qhov sib koom ua ke kub siab tshaj 70℃(los yog qhov kub sib txawv nrog cov khoom qub yog ntau tshaj 20 degree);
Lub suab "hissing" yog hnov thaum lub sij hawm ua hauj lwm, los yog muaj ib tug burnt tsw, discoloration los yog oxidation cim ntawm cov pob qij txha;
Hauv qhov xwm txheej hnyav, nws yuav ua rau muaj kev tiv thaiv overcurrent tripping thiab txawm tias busbar hlawv.
Qhov Tseem Ceeb
Bolt loosening: Ntev- lub sijhawm ua haujlwm vibration lossis tsis txaus lub zog thaum lub sijhawm teeb tsa ua rau xoob ntawm tus neeg xyuas pib txuas bolts;
Tiv tauj nto oxidation: tooj liab / txhuas busbar pob qij txha tsis tinned los yog nyiaj -plated, los yog anti- oxidation muab tshuaj txhuam yog unevenly thov;
Kev xaiv tsis raug: Cov ntoo khaub lig tsis sib haum - ntu tam sim no - nqa cov khoom ua rau ua rau lub sijhawm ntev - kev ua haujlwm ntau dhau.
Kev Kho Mob
Kev kho mob xwm txheej ceev: Tam sim ntawd disconnect lub Circuit Court breaker ntawm faulty Circuit Court, cais lub hwj chim mov los tiv thaiv kev txhaum expansion;
Kev ua haujlwm tu: Disassemble qhov sib koom ua ke, polish txheej oxide, rov muab tshuaj txhuam los yog tshuaj tiv thaiv - oxidation paste; zawm cov bolts raws li lub zog torque (saib rau cov chaw tsim khoom cov ntawv qhia, feem ntau lub zog ntawm M10 bolts yog li 25N·m);
Kev tiv thaiv: Ua kev soj ntsuam tsis tu ncua nrog cov ntsuas kub infrared, ua cov ntsuas ntsuas ntsuas ntsuas ib xyoos ib zaug (yuav tsum tsawg dua lossis sib npaug ntawm 200μΩ, kho raws li cov qauv); zam kev ua haujlwm ntev - lub sij hawm overload ntawm switchgear.
II. Rwb thaiv tsev Faults
Rwb thaiv tsev faults ncaj qha hem lub lag luam kev nyab xeeb ntawm switchgear, uas yuav ua rauluv Circuit Court, grounding trippingthiab txawm tias arc tawg raug xwm txheej, feem ntau tshwm sim nyob rau hauv qhov chaw ntub thiab muaj kuab paug.
Common Phenomena
Creeping tawm thiab flashovertshwm sim hauv lub switchgear, nrog rau lub teeb xiav arc lossis pungent ozone tsw;
Qhov ntsuas hluav taws xob tiv thaiv tus nqi poob qis heev (qhov kev tiv thaiv hluav taws xob ntawm theem lossis theem rau hauv av yog<1000MΩ);
Grounding tiv thaiv tripping feem ntau tshwm sim thaum lub sijhawm ua haujlwm, thiab muaj cov kab nrib pleb lossis av txheej ntawm qhov chaw ntes thiab cov insulators.
Qhov Tseem Ceeb
Environmental factors: Excessive humidity (>75%) nyob rau hauv lub switchgear ua rau condensation, los yog plua plav thiab roj stains adhere rau saum npoo ntawm insulating qhov chaw;
Rwb thaiv tsev laus: Epoxy resin insulators thiab bushings tawg thiab carbonize vim ntev -lub sij hawm hluav taws xob kev ntxhov siab thiab kub los;
Kev nkag mus rau lub cev txawv teb chaws: cov khib nyiab hlau thiab cov cuab yeej sab laug thaum lub sijhawm teeb tsa tsis raug ntxuav, ua rau muaj qhov sib txawv ntawm cov rwb thaiv tsev.
Kev Kho Mob
Kev kho mob xwm txheej ceev: Tam sim ntawd kaw lub faulty switchgear, disconnect cov khoom siv hluav taws xob sab saud thiab qis, thiab ua teeb meem tom qab cua thiab dehumidification;
Kev ua haujlwm tu: So cov av ntawm qhov chaw ntawm cov insulators thiab bushings, thiab hloov lawv ncaj qha yog tias muaj cov kab nrib pleb lossis carbonization; qhuav sab hauv ntawm lub txee (kev lag luam dehumidifiers lossis phom cua kub tuaj yeem siv tau);
Kev tiv thaiv: Nruab qhov ntsuas kub thiab av noo thiab tiv thaiv - cov cua sov hauv lub txee; ua tsis tu ncua rwb thaiv tsev tiv thaiv thiab dielectric poob kev ntsuam xyuas; khaws lub switchgear chav huv si kom tsis txhob muaj plua plav.
III. Mechanical Operation Faults
Hom kev txhaum no yog concentrated nyob rau hauv lubkev khiav hauj lwm mechanismntawm Circuit Court breakers thiab cais cov keyboards, tus cwj pwm los ntawm qhov tsis ua hauj lwm ntawm kev kaw thiab qhib cov khoom siv, uas cuam tshuam rau kev ntseeg siab ntawm lub zog.
Common Phenomena
Lub Circuit Court breaker "tsis kam kaw" thaum kaw los yog "tsis kam qhib" thaum qhib, thiab cov txheej txheem khiav lag luam jams thaum ua haujlwm;
Lub zog cia lub cev muaj zog ua haujlwm txawv txav thiab tsis tuaj yeem ua tiav lub caij nplooj ntoo hlav lub zog cia, lossis tsis tuaj yeem tuav lub zog cia tom qab khaws cia;
The isolating switch fails to close or open in place, and the contact gap between moving and static contacts exceeds the standard (>3 hli).
Qhov Tseem Ceeb
Mechanism jamming: Kev sib txuas cov pas nrig, lub zog thiab cov pins hauv kev ua haujlwm yog xeb, deformed lossis thaiv los ntawm txawv teb chaws lub cev;
Lub zog cia tivthaiv tsis ua haujlwm: Kaw lub caij nplooj ntoos hlav qaug zog tawg, lub zog cia lub cev muaj zog tsis ua haujlwm, txwv kev hloov pauv kev puas tsuaj;
Pab tiv thaiv tsis ua hauj lwm: Kaw thiab qhib electromagnets hlawv tawm, tswj Circuit Court fuses tshuab, lwm yam xov hlau loosens.
Kev Kho Mob
Kev kho mob xwm txheej ceev: Yog hais tias lub Circuit Court breaker tsis kam qhib, siv ib tug tshwj xeeb qhib kov rau phau ntawv qhib lub lag luam; tsis txhob yuam kev ua haujlwm hluav taws xob los tiv thaiv kev puas tsuaj;
Kev ua haujlwm tu: Tshem tawm sab npog ntawm lub tshuab ua haujlwm, ntxuav cov khoom xeb thiab siv cov roj lubricating; xyuas cov xwm txheej ntawm lub zog cia lub caij nplooj ntoos hlav thiab hloov nws yog tias puas; kuaj tus nqi tsis kam ntawm cov electromagnet coil thiab hloov cov khoom kub hnyiab; nruj cov theem nrab Circuit Court terminals;
Kev tiv thaiv: Ua kom tiav lubrication thiab cov yam ntxwv ntawm kev ntsuas (suav nrog lub sijhawm kaw thiab qhib, ceev thiab synchronism) ntawm cov txheej txheem khiav haujlwm txhua rau lub hlis; tsis tu ncua xyuas cov xwm txheej ntawm fuses hauv kev tswj xyuas Circuit Court.
IV. Kev tiv thaiv thiab Secondary Circuit Faults
Qhov thib ob Circuit Court yog "nerve center" ntawm switchgear, lub luag hauj lwm rautswj, teeb liab thiab kev tiv thaiv kev ua haujlwm. Kev ua yuam kev yuav ua rau muaj kev ua haujlwm tsis zoo lossis tsis kam lees cov cuab yeej tiv thaiv.
Common Phenomena
Tsis muaj lub teeb liab ua haujlwm, qhov taw qhia lub teeb tsis nyob lossis tsis muaj ntsuas ntsuas ntawm lub switchgear;
Cov cuab yeej tiv thaiv tsis ua haujlwm thaum muaj kev ua txhaum kab (tsis kam ua haujlwm), lossis mus ncig ntau zaus thaum tsis muaj qhov txhaum (maloperation);
Kev tswj chaw taws teeb tsis ua haujlwm, thaum lub sijhawm ua haujlwm hauv zos yog qhov qub.
Qhov Tseem Ceeb
Kev puas tsuaj ntawm cov kab hluav taws xob: xoob lossis poob ntawm cov terminals thib ob, lossis luv Circuit Court tshwm sim los ntawm kev puas tsuaj cable;
Kev puas tsuaj ntawm cov khoom siv: Kev ua txhaum ntawm cov khoom siv hluav taws xob, cov cuab yeej hloov pauv (CT / PT) thiab cov cuab yeej tiv thaiv thiab ntsuas;
Kev teeb tsa tus nqi yuam kev: Kev tiv thaiv tsis tsim nyog teeb tsa qhov tseem ceeb, lossis kev sib koom ua ke tsis raug nrog kev tiv thaiv sab saud -.
Kev Kho Mob
Cov kauj ruam daws teeb meem: Ua ntej xyuas seb qhov hluav taws xob hluav taws xob thib ob puas zoo li qub (xws li DC220V tswj fais fab mov); siv lub tshuab ntsuas ntau los ntsuas qhov ntawm - tawm ntawm lub davhlau ya nyob twg thaiv thiab daws teeb meem xoob lossis luv - cov ntsiab lus hauv Circuit Court;
Hloov cov khoom siv: Yog hais tias ob sab ntawm lub transformer tam sim no qhib -circuited, luv -circuit rau CT theem nrab sab ua ntej hloov; yog tias cov cuab yeej tiv thaiv tsis ua haujlwm, rov pib dua qhov kev tiv thaiv qhov tseem ceeb tom qab hloov pauv;
Kev tiv thaiv: Tsis tu ncua txheeb xyuas qhov tseeb ntawm cov cuab yeej tiv thaiv thiab ntsuas ntsuas ntsuas; ua kom pom tseeb rau cov kab hluav taws xob thib ob kom tsis txhob muaj kev sib cuag thaum lub sijhawm tu; tsim kom muaj kev tiv thaiv tus nqi tus account thiab txwv tsis pub hloov pauv.
V. Arc Faults (Malignant Faults)
Qhov no yog qhov ua txhaum loj tshaj plaws ntawm qhov siab -voltage switchgear, feem ntau yog tshwm sim los ntawm kev ua tsis tiav ntawm qhov kev ua txhaum saum toj no raws sijhawm, uas yuav ua rauarc tawg, khoom puas tsuaj thiab txawm tus kheej casualties.
Common Phenomena
Sudden nrov nrov nyob rau hauv lub switchgear, nrog rau cov nplaim taws thiab cov pa taws tuab;
Kev tiv thaiv relay ua haujlwm sai, thiab sab sauv -qib Circuit Court breaker mus hla ntau theem;
Txee deformation, insulator fragmentation thiab hlau tivthaiv ablation.
Qhov Tseem Ceeb
Cov paug hauv zos tshwm sim los ntawm kev puas tsuaj los ntawm kev rwb thaiv tsev thiab kev sib cuag tsis zoo ntawm tus neeg xyuas pib nws thiaj li tsim mus rau hauv arc;
Kev ua haujlwm tsis zoo: Kaw lossis qhib qhov kev sib cais nrog kev thauj khoom, lossis hauv av tsis muaj qhov ntsuas hluav taws xob.
Kev kho mob xwm txheej ceev
Kev khiav tawm ntawm cov neeg ua haujlwm: Tam sim ntawd nyob deb ntawm lub faulty switchgear los tiv thaiv arc burns thiab tus kheej raug mob los ntawm txee tawg thiab txaws;
Txiav fais fab -tawm: Txiav tawm tag nrho cov khoom siv hluav taws xob hauv qhov chaw ua haujlwm tsis raug los ntawm kev tswj chaw taws teeb lossis sab sauv -qib hluav taws xob hluav taws xob; kev ua haujlwm hauv zos raug txwv nruj;
Cov kev cai tu: Tom qab qhov ua txhaum, ua ib qho kev tshuaj xyuas tag nrho ntawm cov txheej txheem txee, insulating qhov chaw thiab busbars, thiab hloov tag nrho yog tias tsim nyog; Nyob rau tib lub sijhawm, tshawb xyuas qhov ua rau kev tiv thaiv kev ua haujlwm, thiab muab tso rau hauv kev ua haujlwm tsuas yog tom qab dhau qhov kev ntsuas hluav taws xob tiv thaiv tom qab kho.
VI. Cov ntsiab cai dav dav rau kev ua txhaum ntawm High-Voltage Switchgear
Kev nyab xeeb ua ntej: Ua ntej tuav txhua qhov txhaum, kev ntsuas kev nyab xeeb ntawmfais fab tuag - voltage detection - grounding - tag daiyuav tsum tau muab coj los siv, thiab nyob hauv daim npog qhov qhib kev saib xyuas raug txwv nruj heev;
Tshawb xyuas ua ntej, tom qab ntawd ua haujlwm: Nrhiav qhov chaw txhaum los ntawm kev ntsuas ntsuas, ntsuas qhov ntsuas kub ntawm infrared thiab kev tshuaj xyuas qhov muag kom tsis txhob dig muag disassembly;
Cov ntaub ntawv thiab cov ntaub ntawv: Tom qab kev ua txhaum cai, sau qhov tshwm sim txhaum cai, ua rau thiab kho cov txheej txheem los pab txhawb kev txheeb xyuas tom ntej thiab kev tiv thaiv kev saib xyuas;
Kev ua haujlwm tshaj lij: Kev tu lub siab -voltage switchgear yuav tsum ua kom tiav los ntawm cov neeg ua haujlwm nrogsiab- daim ntawv pov thawj hluav taws xob hluav taws xob, thiab kev ua haujlwm tsis muaj ntawv tso cai raug txwv nruj heev.
