Cov cuab yeej tiv thaiv: lub hom phiaj, hom, kev faib tawm, kev qhia tshwj xeeb, kev teeb tsa, cov yam ntxwv ntawm kev ua haujlwm, teeb tsa thiab kho

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2024-01-02 13:55

Cov cuab yeej tiv thaiv yog cov khoom siv uas tsim los tiv thaiv hluav taws xob hluav taws xob, khoom siv hluav taws xob, tshuab thiab lwm yam los ntawm txhua qhov kev hem thawj uas cuam tshuam rau kev ua haujlwm ib txwm ntawm cov cuab yeej no, thiab tiv thaiv lawv los ntawm overloads. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov ntawm no tias lawv yuav tsum tau teeb tsa kom raug, thiab kev ua haujlwm yuav tsum tau ua raws nraim raws li cov lus qhia, txwv tsis pub cov cuab yeej tiv thaiv lawv tus kheej tuaj yeem ua rau cov cuab yeej tsis ua haujlwm, tawg, hluav taws thiab lwm yam.

Basic fixture requirements

Yuav kom lub cuab yeej ua haujlwm tau zoo, nws yuav tsum ua raws li cov cai hauv qab no:

• Cov cuab yeej tiv thaiv yuav tsum tsis txhob, nyob rau hauv ib qho xwm txheej, raug tso cai kom siab tshaj qhov kub uas tau tso cai rau lawv nyob rau hauv ib txwm thauj khoom ntawm cov khoom siv hluav taws xob lossis khoom siv hluav taws xob.
• Cov cuab yeej yuav tsum tsis txhob cuam tshuam cov cuab yeej siv hluav taws xob thaum lub sijhawm luv luv, uas feem ntau suav nrog cov hluav taws xob tam sim no, tus kheej pib tam sim no, thiab lwm yam.

Thaum xaiv cov fuse txuas, koj yuav tsum ua raws li qhov ntsuas tam sim no hauv ntu ntawm Circuit Court uas yuav tiv thaiv cov cuab yeej no. Txoj cai no rau kev xaiv cov cuab yeej tiv thaiv muaj feem cuam tshuam rau txhua qhov xwm txheej thaum xaiv ib qho khoom siv tiv thaiv. Nws tseem yog ib qho tseem ceeb kom nkag siab tias nrog rau lub sij hawm overheating, kev tiv thaiv zoo yog txo qis. Qhov no cuam tshuam tsis zoo rau cov khoom siv, txij li thaum lub sijhawm tseem ceeb ntawm kev thauj khoom lawv tuaj yeem, piv txwv li, tsuas yog tsis tua, uas yuav ua rau muaj kev sib tsoo.

Cov cuab yeej tiv thaiv yuav tsum tau tua lub network thaum lub sijhawm ntev dhau los tshwm sim hauv Circuit Court no. Nyob rau hauv cov ntaub ntawv no, qhov inverse dependence rau tam sim no hais txog lub sij hawm raug yuav tsum tau soj ntsuam.

Txawm li cas los xij, cov cuab yeej tiv thaiv yuav tsum tau txiav lub voj voog ntawm qhov kawg thaum muaj qhov luv luv (luv luv luv) tshwm sim. Yog hais tias ib tug luv luv Circuit Court tshwm sim nyob rau hauv ib tug ib-theem Circuit Court, lub kaw yuav tsum tshwm sim nyob rau hauv ib tug network nrog ib tug solidly grounded nruab nrab. Yog hais tias ib tug luv luv Circuit Court tshwm sim nyob rau hauv ib tug ob-theem Circuit Court, ces nyob rau hauv ib tug network nrog cais nruab nrab.

Cov khoom siv hluav taws xob tiv thaiv hluav taws xob muaj lub peev xwm tawg I _{pr. Tus nqi ntawm qhov ntsuas no yuav tsum sib haum rau qhov luv luv Circuit Court tam sim no uas yuav tshwm sim thaum pib ntawm ntu tiv thaiv. Yog tias tus nqi no qis dua qhov siab tshaj plaws tau luv luv tam sim no, cov txheej txheem ntawm kev txiav ib ntu ntawm Circuit Court tej zaum yuav tsis tshwm sim los yog tshwm sim, tab sis nrog kev ncua. Vim li no, tsis tsuas yog cov cuab yeej txuas nrog lub network no tuaj yeem raug puas tsuaj, tab sis kuj tseem muaj cov khoom siv tiv thaiv hluav taws xob tiv thaiv nws tus kheej. Vim li no, lub peev xwm tawg yuav tsum yogntau dua lossis sib npaug rau qhov siab tshaj plaws luv luv tam sim no.}

Fusible Type Fuses

Hnub no, muaj ntau yam khoom siv los tiv thaiv kev sib txuas hluav taws xob, uas feem ntau siv. Ib qho ntawm cov khoom siv no yog fuse. Lub hom phiaj ntawm hom kev tiv thaiv no yog tias nws tiv thaiv lub network los ntawm tam sim no-hom overloads thiab luv circuits.

Hnub no, muaj cov khoom siv pov tseg, nrog rau cov khoom sib hloov tau. Cov khoom siv zoo li no tuaj yeem siv ob qho tib si hauv kev xav tau kev lag luam thiab hauv lub neej txhua hnub. Ua li no, muaj cov khoom siv uas siv rau hauv kab txog 1 kV.

Dhau li ntawm lawv, muaj cov cuab yeej siv hluav taws xob siab siv hauv cov chaw nres tsheb uas nws qhov hluav taws xob ntau dua 1000 V. Ib qho piv txwv ntawm cov cuab yeej no tuaj yeem ua lub fuse ntawm pab hloov pauv ntawm cov chaw nres tsheb nrog 6/0, 4 kV.

Txij li lub hom phiaj ntawm cov cuab yeej tiv thaiv no yog los tiv thaiv luv luv thiab tam sim no overloads, lawv tau siv dav. Tsis tas li ntawd, lawv yog cov yooj yim heev thiab siv tau yooj yim, lawv cov kev hloov pauv kuj ceev thiab yooj yim, thiab lawv muaj kev ntseeg siab rau lawv tus kheej. Tag nrho cov no tau coj mus rau qhov tseeb tias cov fuses no tau siv ntau zaus.

Txhawm rau xav txog cov yam ntxwv, koj tuaj yeem nqa lub cuab yeej PR-2. Nyob ntawm qhov ntsuas tam sim no, cov cuab yeej no muaj rau rau hom cartridges, uas txawv ntawm lawv txoj kab uas hla. Nyob rau hauv lub cartridge ntawm txhua tus ntawm lawv, ib qho ntxig tuaj yeem ntsia tau nrog qhov kev cia siab ntawm qhov sib txawv tam sim no. RauPiv txwv li, 15 A cartridge tuaj yeem haum nrog 6 A thiab 10 A ntxig.

Ntxiv rau qhov tus yam ntxwv no, tseem muaj lub tswv yim ntawm kev ntsuas qis thiab sab sauv tam sim no. Raws li rau tus nqi qis ntawm qhov ntsuas tam sim no, qhov no yog qhov siab tshaj plaws ntawm qhov tam sim no, thaum lub sij hawm ntws ntawm qhov hluav taws xob hauv Circuit Court rau 1 teev, ntu Circuit Court yuav tsis raug txiav. Raws li rau tus nqi siab, qhov no yog qhov tsawg kawg nkaus tam sim no coefficient uas, thaum ntws rau 1 teev nyob rau hauv lub voj voog, yuav yaj lub ntxig rau hauv kev tiv thaiv thiab tswj apparatus.

Circuitbreakers

Circuit Breakers ua lub luag haujlwm tib yam li fuses, tab sis lawv cov qauv tsim muaj ntau dua. Txawm li cas los xij, qhov no yog offset los ntawm qhov tseeb tias cov keyboards yooj yim dua siv dua li fuses. Piv txwv li, yog hais tias ib tug luv luv Circuit Court tshwm nyob rau hauv lub network vim kev laus ntawm lub rwb thaiv tsev, ces tus hloov yog muaj peev xwm disconnect lub puas seem ntawm hluav taws xob Circuit Court los ntawm lub hwj chim. Nyob rau tib lub sijhawm, kev tswj hwm thiab kev tiv thaiv cov cuab yeej nws tus kheej tau rov qab tau yooj yim heev, tom qab kev ua haujlwm nws tsis tas yuav hloov nrog ib qho tshiab, thiab tom qab ua haujlwm kho nws muaj peev xwm tiv thaiv tau qhov seem ntawm Circuit Court nyob rau hauv nws cov kev tswj dua. Nws yog qhov yooj yim heev los siv cov keyboards no yog tias tsim nyog los ua txhua yam kev kho niaj hnub.

Raws li kev tsim cov khoom siv no, qhov taw qhia tseem ceeb yog qhov ntsuas tam sim no uas lub cuab yeej tsim. Hauv qhov no, muaj kev xaiv loj, uas tso cai rau koj xaiv qhov zoo tshaj plaws rau txhua txoj saw.ntaus ntawv. Yog hais tias peb tham txog kev khiav hauj lwm voltage, ces lawv, zoo li fuses, muab faib ua ob hom: nrog voltage mus txog 1 kV thiab high-voltage nrog ib tug khiav hauj lwm voltage siab tshaj 1 kV. Nws yog ib qho tseem ceeb ntxiv rau ntawm no tias cov cuab yeej tiv thaiv hluav taws xob siab rau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob tau tsim hauv lub tshuab nqus tsev, nrog cov roj inert lossis roj puv. Qhov kev tsim no tso cai rau qib siab dua kom tshem tawm lub voj voog thaum muaj qhov xav tau tshwm sim. Lwm qhov sib txawv tseem ceeb ntawm Circuit Court breakers thiab fuses yog tias lawv tau tsim rau kev ua haujlwm tsis yog hauv ib theem xwb, tab sis kuj nyob rau hauv peb theem circuits.

Piv txwv li, thaum lub caij luv luv mus rau hauv av ntawm ib qho ntawm cov neeg tsav tsheb ntawm lub tshuab hluav taws xob, lub tshuab hluav taws xob yuav tua tag nrho peb theem, thiab tsis yog ib qho puas lawm. Qhov no yog qhov tseem ceeb thiab qhov sib txawv tseem ceeb, vim tias tsuas yog ib theem raug kaw, lub cev muaj zog yuav txuas ntxiv mus rau ob theem. Hom kev ua haujlwm no yog qhov xwm txheej ceev thiab txo qis lub neej ntawm lub cuab yeej, thiab tej zaum yuav ua rau muaj kev kub ntxhov ntawm cov khoom siv. Tsis tas li ntawd, lub tshuab hluav taws xob tsis siv neeg yog tsim los ua haujlwm nrog AC thiab DC voltage.

Thermal thiab tam sim no relay

Hnub no, muaj ntau yam sib txawv ntawm cov khoom siv hluav taws xob tiv thaiv hluav taws xob.

Thermal relay yog ib qho ntawm cov khoom siv ntau tshaj plaws uas tuaj yeem tiv thaiv lub tshuab hluav taws xob, cua sov, txhua yam khoom siv hluav taws xob los ntawmteeb meem xws li overload tam sim no. Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm cov cuab yeej no yog qhov yooj yim heev, thiab nws yog raws li qhov tseeb tias hluav taws xob tam sim no muaj peev xwm ua kom sov tus neeg xyuas pib los ntawm qhov nws ntws. Lub ntsiab ua haujlwm ntawm ib qho thermal relay yog bimetallic phaj. Thaum rhuab mus rau ib qho kub, cov phaj no khoov, uas ua rau cov hluav taws xob sib cuag hauv Circuit Court. Lawm, cov cua kub ntawm lub phaj yuav txuas ntxiv mus txog thaum nws ncav cuag qhov tseem ceeb.

Ntxiv rau qhov thermal, muaj lwm yam kev tiv thaiv cov cuab yeej, piv txwv li, ib lub relay tam sim no uas tswj cov nqi tam sim no hauv lub network. Kuj tseem muaj qhov hluav taws xob relay uas yuav teb rau qhov kev hloov pauv ntawm qhov hluav taws xob hauv lub network thiab qhov sib txawv tam sim no relay. Cov cuab yeej kawg yog cov khoom siv tiv thaiv tam sim no. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov ntawm no tias cov hluav taws xob hluav taws xob, xws li fuses, tsis tuaj yeem hnov mob rau qhov tshwm sim tam sim no, vim tias tus nqi no tsawg heev. Tab sis tib lub sijhawm, tus nqi no yog qhov txaus los tua ib tus neeg nyob rau hauv kev sib cuag nrog cov ntaub ntawv ntawm cov cuab yeej ua haujlwm tsis zoo.

Yog tias muaj ntau cov khoom siv hluav taws xob uas xav tau los txuas cov khoom sib txawv tam sim no, ces cov tshuab ua ke feem ntau siv los txo qhov loj ntawm lub hwj chim thaiv. Cov khoom siv sib xyaw ua ke ntawm cov hluav taws xob sib txuas thiab qhov sib txawv tam sim no relay - qhov sib txawv tiv thaiv Circuit Court breakers, lossis difautomats, tau dhau los ua cov khoom siv zoo li no. Thaum siv cov khoom siv zoo li no, tsis yog tsuas yog qhov loj ntawm lub hwj chim shield yog txo, tab sis cov txheej txheem installation tau yooj yim heev.kev tiv thaiv apparatus, uas nyob rau hauv lem ua rau lawv ntau yig.

Thermal Relay Specifications

Tus yam ntxwv tseem ceeb rau thermal relays yog lub sij hawm teb, uas nyob ntawm qhov load tam sim no. Hauv lwm lo lus, tus yam ntxwv no hu ua lub sijhawm tam sim no. Yog tias peb xav txog cov ntaub ntawv dav dav, tom qab ntawd ua ntej kev thauj khoom, qhov tam sim no I₀ yuav ntws los ntawm kev xa tawm. Hauv qhov no, cov cua kub ntawm cov phaj bimetallic yuav yog q_{0. Thaum kuaj xyuas tus yam ntxwv no, nws yog ib qho tseem ceeb heev uas yuav tau txiav txim siab los ntawm lub xeev twg (overheated lossis txias) lub cuab yeej ua rau tshwm sim. Tsis tas li ntawd, thaum kuaj xyuas cov cuab yeej no, nws yog ib qho tseem ceeb heev uas yuav tsum nco ntsoov tias lub phaj tsis thermally ruaj khov thaum lub caij luv luv tam sim no tshwm sim.}

Kev xaiv ntawm thermal relays yog raws li hauv qab no. Qhov ntsuas tam sim no ntawm cov cuab yeej tiv thaiv no yog xaiv raws li qhov ntsuas ntsuas ntawm lub tshuab hluav taws xob. Cov xaiv relay tam sim no yuav tsum yog 1, 2-1, 3 ntawm lub cev muaj zog tam sim no (load tam sim no). Hauv lwm lo lus, xws li cov cuab yeej yuav ua haujlwm yog tias tsis pub dhau 20 feeb cov load yog los ntawm 20 mus rau 30%.

Nws yog ib qho tseem ceeb heev kom nkag siab tias kev ua haujlwm ntawm cov thermal relay cuam tshuam loj heev los ntawm huab cua puag ncig. Vim qhov nce ntawm qhov kub thiab txias, kev khiav hauj lwm tam sim no ntawm cov cuab yeej no yuav txo qis. Yog tias qhov ntsuas no txawv ntau dhau los ntawm lub npe nominal, ces nws yuav tsim nyog los ua qhov kev hloov kho ntxiv ntawm tus relay,los yog yuav ib lub cuab yeej tshiab, tab sis xav txog qhov tseeb qhov kub thiab txias hauv thaj chaw ua haujlwm ntawm chav tsev no.

Txhawm rau txo qhov cuam tshuam ntawm qhov kub thiab txias ntawm tus nqi tam sim no, nws yog ib qho tsim nyog yuav tau yuav ib lub relay nrog qhov ntsuas siab dua. Yuav kom ua tiav qhov kev ua haujlwm zoo ntawm cov cuab yeej sov, nws yuav tsum tau nruab rau hauv tib chav raws li cov khoom tswj. Txawm li cas los xij, nws yuav tsum tau nco ntsoov tias lub relay teb rau qhov kub thiab txias, thiab yog li ntawd nws yog txwv tsis pub muab tso rau ze ntawm cov concentrated cua sov qhov chaw. Boilers, cua sov qhov chaw thiab lwm yam zoo sib xws thiab cov khoom siv tau suav tias yog qhov chaw zoo li no.

Xaiv cov khoom siv

Thaum xaiv cov cuab yeej siv los tiv thaiv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, nws yuav tsum ua raws li cov ntsuas hluav taws xob uas cov cuab yeej no tau tsim, nrog rau cov khoom siv tam sim no rau lub network uas cov chav yuav raug teeb tsa.

Thaum xaiv cov cuab yeej tiv thaiv, nws tseem ceeb heev uas yuav tsum nco ntsoov qhov tshwm sim ntawm cov kev ua haujlwm txawv txav xws li:

• phase-rau-theem luv luv;
• phase short to case;
• muaj zog nce tam sim no, uas tuaj yeem tshwm sim los ntawm kev ua tsis tiav luv luv lossis cov khoom siv ntau dhau;
• ploj tag lossis txo qhov voltage ntau dhau.

Raws li kev tiv thaiv luv luv, nws yuav tsum tau ua rau txhua tus txais hluav taws xob. Lub ntsiab yuav tsum tau yog hais tias disconnecting lub ntaus ntawv los ntawm lub network thaumqhov tshwm sim ntawm qhov luv luv Circuit Court yuav tsum yog qhov tsawg kawg nkaus. Thaum xaiv cov cuab yeej tiv thaiv, nws tseem ceeb heev kom paub tias yuav tsum muaj kev tiv thaiv overcurrent tag nrho, tshwj tsis yog qee qhov xwm txheej hauv qab no:

• thaum overloading hluav taws xob receivers rau technologies yog tsis yooj yim sua los yog tsis zoo;
• yog tias lub zog ntawm lub tshuab hluav taws xob tsawg dua 1 kW.

Tsis tas li ntawd, ib qho khoom siv tiv thaiv hluav taws xob yuav tsis muaj kev tiv thaiv ntau dhau yog tias nws raug teeb tsa los saib xyuas lub tshuab hluav taws xob uas ua haujlwm tsis sib xws lossis tsis sib xws. Ib qho tshwj xeeb yog kev teeb tsa cov khoom siv hluav taws xob hauv cov chav uas muaj hluav taws kub txaus ntshai. Hauv cov chav zoo li no, kev tiv thaiv overload yuav tsum tau nruab rau ntawm txhua yam khoom siv yam tsis muaj kev zam.

Kev tiv thaiv kev tiv thaiv hluav taws xob yuav tsum tau teeb tsa hauv qee qhov xwm txheej hauv qab no:

• rau lub tshuab hluav taws xob uas tsis tuaj yeem hloov pauv ntawm qhov hluav taws xob tag nrho;
• rau lub tshuab hluav taws xob uas tsis tso cai rau nws tus kheej pib vim muaj ntau yam txuj ci, lossis nws txaus ntshai rau cov neeg ua haujlwm;
• rau lwm lub tshuab hluav taws xob uas yuav tsum tau muab tua kom txo tau tag nrho lub zog ntawm tag nrho cov khoom siv hluav taws xob sib txuas ntawm lub network no kom tau txais txiaj ntsig.

Ntau yam tam sim no thiab xaiv cov cuab yeej tiv thaiv

qhov txaus ntshai tshaj plaws yog qhov luv luv tam sim no. Qhov kev phom sij tseem ceeb yog tias nws loj dua li qhov qub pib tam sim no, thiab nws cov nqi tuaj yeem sib txawv heev nyob ntawm qhov seem ntawm qhov chaw uas nws tshwm sim. Yog li, thaum kuaj xyuas cov cuab yeej tiv thaiv uas tiv thaiv lub voj voog ntawm lub voj voog luv, nws yuav tsum, kom sai li sai tau, txiav lub voj voog thaum muaj teeb meem tshwm sim. Nyob rau tib lub sijhawm, tsis muaj teeb meem nws yuav tsum ua haujlwm thaum tus nqi ib txwm pib ntawm cov khoom siv hluav taws xob tshwm sim hauv Circuit Court.

Raws li qhov overload tam sim no, txhua yam yog qhov tseeb ntawm no. Xws li ib tug tam sim no suav hais tias yog ib qho txiaj ntsig ntawm tus yam ntxwv uas tshaj qhov ntsuas tam sim no ntawm lub tshuab hluav taws xob. Tab sis ntawm no nws yog ib qho tseem ceeb heev kom nkag siab tias tsis yog txhua txhua lub sij hawm ib tug overload tam sim no tshwm sim, tus tiv thaiv ntaus ntawv yuav tsum disconnect cov neeg ntawm lub Circuit Court. Qhov no tseem ceeb heev vim tias lub sijhawm luv luv ntawm ob lub tshuab hluav taws xob thiab cov hluav taws xob hluav taws xob tau tso cai nyob rau qee kis. Nws yog ib qho tsim nyog ntxiv ntawm no tias lub sijhawm luv luv, qhov ntau dua qhov tseem ceeb nws tuaj yeem ncav cuag. Raws li qhov no, nws paub meej tias dab tsi yog qhov txiaj ntsig tseem ceeb ntawm qee cov khoom siv. Cov qib ntawm kev tiv thaiv ntawm cov khoom siv nrog "tus yam ntxwv ntawm tus kheej" nyob rau hauv cov ntaub ntawv no yog qhov siab tshaj plaws, txij li lawv lub sij hawm teb yuav txo qis nrog qhov nce ntawm qhov khoom thauj khoom tam sim no. Yog li ntawd, cov cuab yeej zoo li no yog qhov zoo rau kev tiv thaiv overcurrent.

Yuav kom xaus, peb tuaj yeem hais cov hauv qab no. Rau kev tiv thaivluv luv Circuit Court, ib tug freewheeling ntaus ntawv yuav tsum tau xaiv, uas yuav tsum configured mus ua hauj lwm ib tug tam sim no ho siab tshaj tus nqi pib. Rau kev tiv thaiv overload, ntawm qhov tsis sib xws, kev tiv thaiv kev hloov khoom siv yuav tsum muaj inertia, nrog rau cov yam ntxwv ntawm tus kheej. Nws yuav tsum raug xaiv raws li txoj hauv kev uas nws tsis ua haujlwm thaum lub sijhawm pib ntawm cov khoom siv hluav taws xob.

Qhov tsis zoo ntawm ntau hom kev tiv thaiv

fuses, uas yav dhau los tau siv dav los ua cov khoom siv tiv thaiv hluav taws xob, muaj qhov tsis zoo hauv qab no:

• muaj peev xwm txwv tsis pub siv los tiv thaiv overcurrent li inrush tam sim no detuning yog qhov nyuaj heev;
• lub cev muaj zog txuas ntxiv mus rau ob theem txawm tias qhov thib peb raug txiav tawm los ntawm lub fuse, ua rau lub cev muaj zog tsis tu ncua;
• nyob rau qee kis, qhov kev txiav tawm fais fab tsis txaus;
• tsis muaj peev xwm rov qab tau sai sai tom qab hluav taws xob poob.

Raws li cov tshuab cua tshuab, lawv zoo tshaj li fuses, tab sis lawv tsis muaj qhov tsis zoo. Qhov teeb meem tseem ceeb ntawm kev siv cov khoom siv tiv thaiv hluav taws xob yog tias lawv tsis xaiv raws li qhov kev txiav txim. Qhov no yog qhov tshwj xeeb tshaj yog pom tau yog tias tsis muaj kev txiav tawm tam sim no tshwm sim ntawm lub tshuab teeb tsa.

Muaj cov tshuab kev teeb tsa uas muaj kev tiv thaiv overload yog ua los ntawm kev tso tawm thermal. Sensitivity thiablawv qhov ncua sij hawm yog qhov phem tshaj qhov thermal relays, tab sis tib lub sijhawm lawv ua rau tag nrho peb theem ib zaug. Raws li rau universal tsis siv neeg tshuab rau kev tiv thaiv, ntawm no nws yog txawm phem. Qhov no yog qhov tseeb los ntawm qhov tseeb tias tsuas yog cov khoom siv hluav taws xob tso tawm xwb.

Magnetic starters feem ntau yog siv, nyob rau hauv uas thermal hom relays yog tsim. Cov khoom siv tiv thaiv zoo li no tuaj yeem tiv thaiv hluav taws xob hluav taws xob los ntawm cov khoom siv hluav taws xob ntau dhau hauv ob theem. Tab sis txij li cov thermal relays muaj qhov inertia loj, lawv tsis muaj peev xwm muab kev tiv thaiv luv luv. Txhim kho lub tuav kauj nyob rau hauv lub oob khab tuaj yeem muab kev tiv thaiv undervoltage.

Kev tiv thaiv zoo tiv thaiv ob qho tib si overload tam sim no thiab luv luv Circuit Court tsuas yog muab los ntawm induction relays lossis electromagnetic relays. Txawm li cas los xij, lawv tsuas tuaj yeem ua haujlwm los ntawm cov khoom siv sib txuas, uas ua rau lub voj voog nrog lawv cov kev sib txuas nyuaj.

Cov ntsiab lus saum toj no, peb tuaj yeem kos ob nqe lus hauv qab no:

1. Tiv thaiv lub tshuab hluav taws xob, uas nws lub zog tsis tshaj 55 kW, los ntawm cov khoom siv tam sim no, cov hlau nplaum pib nrog fuses lossis nrog cov khoom siv cua feem ntau siv.
2. Yog tias lub zog ntawm lub tshuab hluav taws xob muaj ntau dua 55 kW, ces electromagnetic contactors nrog lub tsheb huab cua lossis kev tiv thaiv relay yog siv los tiv thaiv lawv. Nws yog ib qho tseem ceeb heev uas yuav tsum nco ntsoov ntawm no tias tus contactor yuav tsis tso cai rau lub Circuit Court tawg yog hais tias ib tug luv luv Circuit Court tshwm sim.

Thaum xaiv cov cuab yeej tsim nyog, nws tseem ceeb heev uas yuav tsum suav cov khoom siv tiv thaiv. Cov mis tseem ceeb tshaj plaws yog kev suav cov ntsuas tam sim no ntawm lub cev muaj zog, uas yuav tso cai rau koj xaiv cov cuab yeej tiv thaiv nrog cov ntsuas tsim nyog. Cov mis zoo li no:

I_n=R_dv ÷(√3U_{ncos c n), qhov twg:}

I_{n yog qhov ntsuas tam sim no ntawm lub cev muaj zog, uas yuav nyob hauv A;}

R_{motor yog lub zog ntawm lub cav, uas yog sawv cev hauv kW;}

U_{n is the rated voltage in V;}

cos q yog lub zog ua haujlwm;

n yog qhov ua tau zoo.

Paub cov ntaub ntawv no, koj tuaj yeem yooj yim xam cov ntsuas tam sim no ntawm lub cev muaj zog, thiab tom qab ntawd yooj yim xaiv cov cuab yeej tiv thaiv tsim nyog.

Ntau yam kev puas tsuaj rau cov cuab yeej tiv thaiv

Qhov sib txawv tseem ceeb ntawm cov khoom siv tiv thaiv hluav taws xob tiv thaiv hluav taws xob thiab lwm yam khoom siv yog tias lawv tsis tsuas yog kho qhov tsis xws luag, tab sis kuj tseem cuam tshuam lub Circuit Court yog tias tus yam ntxwv muaj nuj nqis mus dhau qee qhov kev txwv. Qhov teeb meem txaus ntshai tshaj plaws, uas feem ntau cuam tshuam cov cuab yeej tiv thaiv, tau dhau los ua lag ntseg luv luv. Thaum lub sij hawm tshwm sim ntawm xws li ib tug luv luv Circuit Court, cov ntsuas tam sim no ncav cuag qhov tseem ceeb tshaj plaws.

Thaum qhib Circuit Court tshwm sim thaum muaj teeb meem tshwm sim, hluav taws xob arc feem ntau tshwm sim, uas nyob rau lub sijhawm luv luv yog qhov muaj peev xwm ua kom puas lub rwb thaiv tsev thiab melting cov hlau ntawm cov cuab yeej.

Yog tias muaj ntau dhau tam sim no tshwm sim, nws yuav ua rau cov khoom siv hluav taws xob dhau los. Tsis tas li ntawd, muaj mechanical zog uasnce qhov hnav ntawm tus kheej ntawm cov khoom siv, uas tuaj yeem ua rau muaj kev tawg ntawm cov cuab yeej.

Muaj cov kab hluav taws xob nrawm nrawm uas ua rau muaj teeb meem xws li rub lub caj npab txav tau thiab txav mus los tiv thaiv phab ntsa ntawm arc chute, nrog rau luv luv lub demagnetizing coil bar rau rooj plaub. Feem ntau muaj hnav ntau dhau ntawm qhov chaw tiv tauj, pistons thiab lub tog raj kheej tsav.

Kho cov tshuab ua haujlwm siab

Kho txhua hom kev tiv thaiv kev kub ceev yuav tsum tau ua nyob rau hauv tib theem. Lub siab ceev hloov, los yog BV, yog tshuab nrog huv compressed cua ntawm lub siab ntawm tsis ntau tshaj 300 kPa (3kgf / cm 2). Tom qab ntawd, cov cuab yeej yog so nrog napkins. Tom ntej no, koj yuav tsum tshem tawm cov khoom xws li arc chute, thaiv cov cuab yeej, pneumatic actuator, txav kev sib cuag armature, inductive shunt, thiab lwm yam.

Kev kho ncaj qha ntawm lub cuab yeej yog ua tiav ntawm qhov chaw kho tshwj xeeb. Lub arc chute yog disassembled, nws cov phab ntsa yog ntxuav nyob rau hauv ib tug tshwj xeeb txhaj koob tshuaj tivthaiv blasting tshuab, tom qab uas lawv tau wiped thiab soj ntsuam. Nyob rau sab sauv ntawm lub chamber no, chips tuaj yeem tso cai yog tias lawv qhov loj me tsis pub tshaj 50x50 mm, phab ntsa tuab ntawm cov ntsiab lus ntawm qhov tawg yuav tsum yog los ntawm 4 mus rau 8 hli. Nws yog ib qho tsim nyog los ntsuas qhov kev tawm tsam ntawm lub horns ntawm arc chute. Rau qee qhov qauv, qhov ntsuas yuav tsum yog tsawg kawg 5 MΩ, thiab rau qee qhov, tsawg kawg yog 10 MΩ.

Qhov kev faib puas yuav tsum raug txiavnws tag nrho ntev. Txhua qhov chaw zoo sib xws ntawm fellings yuav tsum tau ua tib zoo ntxuav. Tom qab ntawd, qhov chaw yuav tsum tau sib khi yog lubricated nrog cov kua nplaum raws li epoxy resin. Yog tias cov nplooj ntawv ntxuam tawg tau pom, lawv raug hloov. Yog hais tias muaj qhov khoov, lawv yuav tsum tau leveled thiab rov qab mus rau kev pabcuam. Kuj tseem muaj arc chute, uas yuav tsum tau ntxuav ntawm cov deposits thiab melting, yog tias muaj.