Distribution Box Fault Txhim Kho

(1) Ua rau tsis ua hauj lwm

1. Kev ua txhaum los ntawm qhov cuam tshuam ntawm qhov kub thiab txias ntawm cov khoom siv hluav taws xob tsawg

Cov khoom siv hluav taws xob tsis tshua muaj hluav taws xob hauv lub thawv xa khoom yog tsim los ntawm fuses, AC contactors, residual tam sim no action protectors, capacitors thiab meters. Cov khoom siv hluav taws xob tsis tshua muaj hluav taws xob no tau tsim thiab tsim ua raws li GB1497 "Cov Qauv Txheej Txheem rau Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob", thiab lawv cov kev ua haujlwm ib txwm raug teev tseg raws li: qhov txwv sab saud ntawm huab cua kub tsis tshaj 40 degree; Qhov nruab nrab tus nqi ntawm huab cua kub rau 24 teev tsis tshaj 35 degree; Qhov qis qis ntawm huab cua kub tsis qis dua -5 degree lossis -25 degree .

Lub thawv xa khoom hloov pauv los ntawm daim phiaj hluav taws xob nyob deb nroog ua haujlwm sab nraum zoov. Nws tsis yog tsuas yog raug tshav ntuj ncaj qha los ua kom muaj qhov kub thiab txias, tab sis kuj ua kom sov nws tus kheej thaum ua haujlwm. Yog li ntawd, nyob rau lub caij ntuj sov kub kub, qhov kub hauv lub thawv yuav ncav cuag 60 degrees. Qhov kub siab tshaj qhov ntsuas kub ntawm qhov ntsuas kub tau teev tseg los ntawm cov khoom siv hluav taws xob no, yog li kev ua tsis tiav los ntawm overheating ntawm cov khoom hluav taws xob hauv lub thawv xa khoom yuav tshwm sim.

2. Kev ua tsis tiav los ntawm cov khoom zoo

Thaum lub sij hawm hloov pauv ntawm cov kab hluav taws xob nyob deb nroog, vim muaj ntau lub thawv xa khoom xav tau thiab lub sijhawm siv luv luv, lub thawv xa khoom yuav tsum tau muab cov khoom siv hluav taws xob tsawg tsawg hauv lub sijhawm luv luv thiab ntau ntau. Qee cov khoom lag luam ua tsis tiav sai tom qab muab tso rau hauv kev ua haujlwm. Piv txwv li, qee hom AC contactors tsis tuaj yeem ua haujlwm vim qhov kub hnyiab ntawm lub contactor kaw coil sai tom qab lub thawv xa khoom tau muab tso rau hauv kev ua haujlwm.

3. Kev ua txhaum los ntawm kev xaiv cov khoom siv hluav taws xob tsis raug hauv lub thawv xa khoom

Vim tias qhov kev xaiv tsis tsim nyog ntawm AC contactor muaj peev xwm thaum lub sijhawm tsim khoom, AC contactors ntawm tib lub peev xwm raug teeb tsa rau cov hluav taws xob sib txawv, thiab qhov tsis sib npaug ntawm peb-theem load tsis raug txiav txim siab, thiab theem tam sim no ntawm qee qhov hluav taws xob contactors tsis tuaj yeem hloov mus rau qhov qub. lub hauv paus ntawm cov qauv xaiv, kev xaiv qib tam sim no tau nce, uas ua rau kev kub hnyiab ntawm AC contactor thaum ua haujlwm hauv lub caij ntuj sov kub.

(2) Txoj kev txhim kho

1. Rau lub thawv xa khoom nrog lub peev xwm ntawm 100kV A thiab siab dua, kev tswj qhov kub thiab txias relay (JU-3 lossis JU-4 ultra-me me kub relay) thiab ncej Cov kiv cua ntws tau nruab rau ntawm lub thawv ntawm sab laug sab saum toj ntawm pawg tswj hwm, yog li ntawd thaum lub ntsuas kub hauv lub thawv nce mus txog qhov muaj nuj nqis (xws li 40 degree), lub kiv cua tso tawm tuaj yeem raug qhib kom yuam kom tawm cov cua sov kom dissipate cua sov ntawm lub thawv.

2. Ib qho kev tiv thaiv Circuit Court yog siv los tiv thaiv qhov tshwm sim ntawm qhov tsis ua hauj lwm ntawm sab nraud Circuit Court powered los ntawm lub thawv xa khoom. Xaiv lub me me ntse theem poob tiv thaiv, xws li DA88CM-II lub cev muaj zog theem tsis tiv thaiv module (Shanghai cov khoom) tau nruab rau hauv lub thawv xa khoom los tiv thaiv lub cev muaj zog los ntawm kev kub hnyiab vim tsis tshua muaj hluav taws xob theem poob haujlwm.

3. Txhim kho txoj kev xaim hluav taws xob tsawg-voltage capacitor bank ntawm thawj lub thawv xa khoom, thiab hloov nws txoj haujlwm kev teeb tsa los ntawm pawg lub taub hau ntawm AC contactor kom txuas ntawm cov khoom siv hluav taws xob qis ntawm lub thawv xa khoom thiab lub ntsuas hluav taws xob. Txhawm rau tiv thaiv qhov ntsuas tsis raug ntawm lub ntsuas ntsuas vim yog theem tsis ua haujlwm ntawm lub capacitor Circuit Court thaum ua haujlwm lossis kev puas tsuaj rau lub capacitor. Tsis tas li ntawd, tus qauv xaiv capacitor yuav tsum yog BSMJ series cov khoom lag luam kom ntseeg tau tias kev ua haujlwm zoo thiab kev nyab xeeb ntawm cov khoom.

4. Yog hais tias ib tug ncej-mounted faib chaw nres tsheb khib yog ntxiv, thaum ua lub tis lub plhaub plhaub, ib tug 2 hli tuab stainless hlau phaj yuav xaiv tau, thiab qhov luaj li cas ntawm lub tis lub thawv yuav tsum loj hlob nyob rau hauv kev faib ua feem (JP{{3}). }/3W lub hauv paus siv hauv kev ua liaj ua teb kev ua liaj ua teb Tsis tas li ntawd, qhov dav ntawm thawj lub thawv yog nce li ntawm 100 hli, uas yog, qhov qub 680 hli hloov mus rau 780 hli. Qhov loj tag nrho ntawm kev txhim kho lub thawv yog: 1300 mm × 780 mm × 500 mm), txhawm rau ua kom cov ceg ntoo ntau dua Kev nyab xeeb hluav taws xob nyob nruab nrab ntawm cov xaim hluav taws xob tawm, cov xaim hluav taws xob tawm thiab lub thawv lub plhaub yog qhov tsim nyog rau kev ua haujlwm thiab kev saib xyuas ntawm cov kws ua liaj ua teb hluav taws xob thiab hloov cov fuses, thiab nws kuj tuaj yeem ua kom sov.

5. Xaiv lub zog txuag AC contactor (zoo ib yam li CJ20SI hom), thiab xyuam xim rau AC contactor coil voltage yog txuas nrog lub davhlau ya nyob twg ntawm cov khoom siv hluav taws xob uas tau xaiv tam sim no, thiab ua tib zoo saib xyuas kom raug load txuam. Thaum xaiv AC contactor, koj yuav tsum xaiv cov khoom lag luam nrog cov txheej txheem rwb thaiv tsev ntawm A thiab siab dua, thiab koj yuav tsum xyuas kom meej tias qhov ntsuas tam sim no ntawm lub ntsiab hluav taws xob tiv tauj yuav tsum siab dua lossis sib npaug ntawm cov khoom tam sim no ntawm cov kab tswj. Qhov ntsuas hluav taws xob ntawm electromagnetic coil ntawm contactor yog 380V lossis 220V, thiab lub kauj raug tso cai siv nyob rau hauv thaj tsam ntawm 80 feem pua ​​​​rau 105 feem pua ​​​​ntawm cov ntsuas hluav taws xob.

6. Xaiv cov khoom tiv thaiv kev ua haujlwm tam sim no. Cov khoom uas ua tau raws li cov qauv thiab tau lees paub yuav tsum tau xaiv. Lub sij hawm tawg ntawm tus tiv thaiv to, thaum lub leakage tam sim no yog cov ntsuas hluav taws xob tam sim no, nws lub sijhawm ua haujlwm yuav tsum tsis txhob siab tshaj 0.2s.

7. Tsawg-voltage cables yog siv rau cov kab nkag thiab tawm ntawm lub thawv xa khoom, thiab kev xaiv cov cables yuav tsum ua kom tau raws li cov kev xav tau. Piv txwv li, cov khoom xa tuaj ntawm cov thawv xa khoom ntawm 30kVA thiab 50kVA transformers siv VV22-35 × 4 cables, thiab cov kab tawm sab nraud siv VLV22-35 × 4 cables ntawm tib qhov tshwj xeeb; cov kab nkag ntawm lub thawv xa khoom ntawm 80kVA thiab 100kVA transformers feem siv VV22-50 × 4, VV22-70 × 4 cables, VLV22-50 × 4 thiab VLV22-70 × 4 cables yog siv rau branching tawm, thiab cov cables yog crimped nrog tooj liab-aluminium thaiv qhov ntswg thiab ces txuas nrog lub xov hlau pawg lub taub hau nyob rau hauv lub tis box nrog bolts.

8. Kev xaiv cov fuses (RT, NT hom). Qhov ntsuas tam sim no ntawm tag nrho cov kev tiv thaiv overcurrent fuse nyob rau sab qis-voltage ntawm cov khoom siv hluav taws xob faib hluav taws xob yuav tsum ntau dua li qhov ntsuas tam sim no ntawm cov hluav taws xob tsawg ntawm cov hluav taws xob faib hluav taws xob, feem ntau 1.5 npaug ntawm cov ntsuas tam sim no, thiab cov ntsuas tam sim no. yaj yuav tsum nyob rau hauv raws li qhov tso cai overload ntau ntawm lub transformer thiab fusing Cov cuab yeej yam ntxwv yog txiav txim. Qhov ntsuas tam sim no ntawm cov yaj ntawm kev tiv thaiv overcurrent fuse ntawm qhov hluav taws xob hluav taws xob yuav tsum tsis txhob siab tshaj qhov ntsuas tam sim no ntawm tag nrho cov overcurrent tiv thaiv fuse. Qhov ntsuas tam sim no ntawm cov yaj raug xaiv raws li qhov ib txwm muaj qhov siab tshaj plaws tam sim no ntawm lub voj voog, thiab yuav tsum zam qhov qub ncov tam sim no. Qhov ntsuas tam sim no ntawm qhov sib npaug ntawm lub txhab nyiaj capacitor fuse feem ntau tuaj yeem xaiv raws li 1.5 txog 2.5 npaug ntawm qhov ntsuas tam sim no ntawm lub capacitor.