Kev kuaj xyuas cov teeb meem tiv thaiv hluav taws xob hauv siab -Voltage Cartridge rhaub

Thaum lub hauv av -fault circuit interrupter (GFCI) los yog residual tam sim no ntaus ntawv (RCD) ua rau tripping, cov kab ntau lawm nres. Cov kws kho mob tshem tawm cov teeb meem ntawm 600V cartridge rhaub, xyuas cov hlau tsis muaj zog nrog lub tshuab multimeter (nws dhau qhov kev ntsuas txuas ntxiv), thiab tom qab ntawd muab tso rau hauv. Lub breaker rov qab sai heev. Tsawg rwb thaiv tsev tsis kam ntawm cov hlau tsis kam sab hauv thiab cov hlau hauv av yog yuav luag txhua qhov teeb meem. Qhov no yog qhov teeb meem ntau dua thiab pom tseeb hauv siab -voltage systems.

Rwb thaiv tsev kuj qhia rau koj paub tias zoo npaum li cas lub compacted magnesium oxide (MgO) hmoov ua kom lub zog tiv thaiv coil los ntawm kov lub plhaub sab nraud. Ib qho kev ntsuas megohmmeter (megger) ntawm 500 V DC lossis 1000 V DC yuav tsum qhia tias tus nqi no ntau dua 5-20 MΩ rau lub tshuab nqus tsev noj qab haus huv ntawm chav tsev kub (20-25 degree). Cov qauv kev lag luam feem ntau hu rau cov chav tshiab kom muaj ntau tshaj 100 MΩ, uas yog qhov zoo rau cov chav nyob uas tau siv rau xyoo nyob rau hauv qhuav qhuav. Txawm li cas los xij, yog tias cov dej noo nkag mus rau hauv qhov kev txiav tawm los ntawm kev tawg epoxy, silicone puas, lossis iav tsis muaj zog-rau-hlau, qhov rwb thaiv tsev tiv thaiv tuaj yeem poob mus rau kaum lossis ntau pua kilohms, lossis txawm nyob ze -tuag luv luv. Ntawm 600V, txawm tias qhov hluav taws xob me me (ob peb milliamps) txaus los ua rau GFCI / RCD cov khoom siv nrog qhov rhiab heev ntawm 5-30 mA. Qhov no ua rau tib neeg thiab khoom siv nyab xeeb los ntawm kev poob siab thiab hluav taws kub hem.


Hom kev ua tsis tiav no feem ntau zais thaum koj sim nws ntawm lub rooj ntev zaum. Lub rhaub uas nyeem ntau tshaj 10 MΩ thaum txias tuaj yeem poob ntau thaum kub. Contaminated MgO yuav ua tau ntau dua thaum qhov kub nce mus. Cov dej uas tau nqus tau tawg, ionic txav mus los, thiab lub zog dielectric poob. Cov dej ntws tawm tam sim no nce sai heev, thiab feem ntau nws mus dhau qhov kev txwv kev nyab xeeb tsuas yog tom qab 30 mus rau 60 feeb ntawm kev siv. Qhov no yog vim li cas lub tshuab cua sov tuaj yeem dhau qhov kev ntsuas txias megger hauv lub khw tsis tau tawm mus tam sim lossis tom qab thaum nws tau nruab thiab tig rau hauv pwm.

Qhov laj thawj tseem ceeb yog cov dej noo nkag mus rau hauv. Cov dej vapor tuaj yeem txav mus raws cov xaim hlau lead lossis nthuav tawm cov khoom tsis muaj zog yav dhau los hauv cov chaw uas muaj cov av noo siab, cov dej xau, cov dej ntws tawm thaum lub sijhawm txias, lossis ntev - lub sijhawm khaws cia yam tsis muaj cov khoom ntim zoo. Txawm tias me me foob puas dhau ntau txhiab lub voj voog cua sov cia kom nqus tau maj mam. Ib zaug sab hauv, noo noo ua ke nrog MgO los ua magnesium hydroxide, uas ua rau cov rwb thaiv tsev tsis zoo thiab tsim cov kav dej mus tas li.

High- zoo 600V cartridge tso cua sov tiv thaiv qhov tsis muaj zog los ntawm kev siv cov kev txiav tawm siab tshaj plaws: - Ob lossis peb lub foob: lub ntsiab epoxy lossis silicone potting nrog lub thib ob ceramic los yog iav -rau -hlau barrier qab nws. - Ntev txias-pin feem nrog rau sab hauv MgO plugs los yog micas ntxuav Kev txiav tawm uas tuaj yeem tiv thaiv qhov kub tsis tu ncua ntawm 300 thiab 400℃. - Mineral-insulated leads uas npog tag nrho cov kev raug xaim.

Qee cov cim qhia tias muaj qee yam tsis raug yog: - Tripping tsuas yog tom qab sov so ( dhau qhov kev sim txias, ua tsis tiav qhov ntsuas kub). - Ntau lub lis piam lossis hli, cov dej ntws maj mam nce ntxiv . - Corrosion, discoloration, lossis cov hmoov dawb uas tuaj yeem pom nyob ze ntawm cov hlau lead tawm . - Megger cov ntawv nyeem nws muaj kev nyab xeeb ntau heev (yog tias muaj kev nyab xeeb ntau heev) kub- tswj qhov cub lossis sim nws hauv qhov chaw).

Yog tias koj lub rhaub dej tsuas yog tawg me ntsis, koj tuaj yeem "kho tawm" los ntawm kev siv hluav taws xob tsawg (50-100 V) lossis muab tso rau hauv qhov cub ntawm 100-150℃rau 4-12 teev thaum koj xyuas cov rwb thaiv tsev kom txog thaum nws nyob qis dua 20 MΩ. Qhov no tshem tawm cov dej noo, tab sis nws tsis kho cov ntsaws ruaj ruaj tawg lossis ua rau MgO deteriorating, yog li qhov teeb meem yuav tshwm sim dua.

Rau qhov tseem ceeb 600V siv xws li precision molding, cov khoom siv semiconductor, lossis siab - muaj txiaj ntsig ntau lawm, kev ntsuas kev tiv thaiv tsis tu ncua yuav tsum yog ib feem ntawm kev saib xyuas niaj hnub. Qee qhov kev coj ua zoo tshaj plaws yog: - Kev sim nrog megger ntawm 1000 V DC ib hlis ib zaug lossis tom qab muaj kev ya raws . - Kev nkag mus: khaws cov ntawv nyeem dhau sijhawm; Ib qho kev poob qis tsis tu ncua qhia tias qee yam tab tom yuav mus tsis ncaj ncees lawm . - Hloov tam sim yog tias qhov kev tiv thaiv txias poob qis dua 5 MΩ lossis qhov kub tawm mus siab dua 1-2 mA ntawm qhov ua haujlwm voltage. - Ib puag ncig tswj: Khaws cov cua sov hauv lub hnab ntim nrog cov khoom siv desiccant, khaws cov coj mus deb ntawm qhov cub thiab qhov chaw txias, thiab siv lub thawv sib txuas 6.

Yog tias lub tshuab hluav taws xob cartridge muaj qhov tsis tshua muaj hluav taws xob tsis zoo, nws yog qhov pom tseeb tias nws yuav tsum tau hloov tam sim ntawd. Txhawm rau txwv tsis pub nws rov tshwm sim dua, qhov ua rau- xws li ib puag ncig kev ua haujlwm, kev sib khi ruaj khov, cov txheej txheem khaws cia, lossis kev puas tsuaj rau kev teeb tsa- yuav tsum tau ua nrog. Nyob rau hauv 600V systems, qhov twg arc zog thiab qhov txhaum tam sim no loj dua nyob rau hauv 380V los yog 220V systems, txheeb xyuas cov rwb thaiv tsev tsis zoo thaum ntxov tuaj yeem tiv thaiv tsis yog kev mus ncig ua si xwb tab sis kuj tseem tuaj yeem ua rau lub plhaub tawg, pwm puas, lossis teeb meem kev nyab xeeb. Cov nroj tsuag tig ib qho kev ua tsis tau zoo rau hauv qhov kev kwv yees, tswj tau ib feem ntawm lub tshuab cua sov kom ntseeg tau los ntawm kev kho cov rwb thaiv tsev tiv thaiv raws li qhov qhia txog kev noj qab haus huv tseem ceeb tsis yog kev xav tom qab.