Surge arrester yam ntxwv:
1. Lub zinc oxide ntes tau muaj peev xwm txaus,
uas yog feem ntau xav txog nyob rau hauv lub peev xwm ntawm tus ntes kom nqus tau ntau yam xob laim overvoltages, fais fab zaus zaus overvoltages, thiab kev khiav hauj lwm overvoltages.Lub peev xwm ntws ntawm zinc oxide surge arresters uas tsim los ntawm Chuantai tau ua tau raws li tag nrho lossis ntau tshaj qhov yuav tsum tau ua ntawm lub teb chaws tus qauv.Cov ntsuas xws li kab tawm theem, lub zog nqus peev xwm, 4/10 nanosecond siab tam sim no cuam tshuam tsis kam, thiab 2ms square nthwv dej ntws muaj peev xwm tau mus txog qib hauv tsev.
2. Cov yam ntxwv tiv thaiv zoo heev
Zinc oxide ntes Zinc oxide ntes yog cov khoom siv hluav taws xob siv los tiv thaiv ntau yam khoom siv hluav taws xob hauv lub zog hluav taws xob los ntawm kev puas tsuaj overvoltage, thiab muaj kev tiv thaiv zoo.Vim tias cov yam ntxwv uas tsis yog-linear volt-ampere ntawm zinc oxide valve yog qhov zoo heev, tsuas yog ob peb puas microamps ntawm tam sim no ntws los ntawm kev ua haujlwm voltage, uas yooj yim los tsim rau hauv cov qauv gapless, kom nws muaj kev tiv thaiv zoo, lub teeb. hnyav thiab me me.feature.Thaum lub overvoltage invades, tam sim no ntws los ntawm lub valve nce sai, thiab nyob rau tib lub sij hawm txwv lub amplitude ntawm lub overvoltage thiab tso tawm lub zog ntawm lub overvoltage.Tom qab ntawd, zinc oxide valve rov qab mus rau lub xeev siab ua kom lub zog ua haujlwm zoo li qub.
3. Lub sealing kev ua tau zoo ntawm zinc oxide ntes tau zoo.Cov
Cov khoom ntes ntes tau txais cov tsho zoo sib xws nrog kev laus ua haujlwm zoo thiab zoo huab cua nruj.Kev ntsuas xws li kev tswj lub compression ntawm lub nplhaib sealing thiab ntxiv sealant raug saws.Lub tsho ceramic yog siv los ua cov khoom sib khi kom ntseeg tau tias kev sib khi ruaj khov.Kev ua tau zoo ntawm tus ntes yog ruaj khov.
4. Lub tshuab ua haujlwm ntawm zinc oxide ntes
Feem ntau xav txog peb yam hauv qab no:
⑴ Lub zog av qeeg nws dais;
⑵ Lub siab tshaj plaws cua siab ua haujlwm ntawm tus ntes ⑶Cov
sab saum toj ntawm tus ntes dais qhov siab tshaj plaws tso cai nruj ntawm cov hlau.
5. Zoo
Anti-pollution kev ua tau zoo ntawm zinc oxide ntes Tsis muaj qhov sib txawv zinc oxide ntes tau muaj kuab paug siab ua haujlwm.
Cov qhab-nees nyob deb ntawm kev nkag siab uas tau teev tseg los ntawm cov qauv hauv tebchaws tam sim no yog:
⑴Class II qhov chaw qias neeg tsawg: creepage tshwj xeeb nrug 20mm/kv
⑵Class III hnyav hnyav thaj chaw: creepage tshwj xeeb nrug 25mm/kv
⑶ IV chav kawm muaj kuab paug tshwj xeeb: creepage tshwj xeeb nrug 31mm /kv
6. Kev ua haujlwm siab ntawm zinc oxide ntes Cov kev ntseeg tau
ntawm kev ua haujlwm ntev nyob ntawm qhov zoo ntawm cov khoom thiab seb qhov kev xaiv ntawm cov khoom puas tsim nyog.Qhov zoo ntawm nws cov khoom yog feem ntau cuam tshuam los ntawm peb yam hauv qab no:
A. Lub rationality ntawm tag nrho cov qauv ntawm tus ntes;
B. Cov yam ntxwv volt-ampere thiab kev laus ua haujlwm ntawm zinc oxide valve phaj;
C. Lub sealing kev ua tau zoo ntawm tus ntes.
7. Fais fab zaus kam rau ua
Vim muaj ntau yam hauv lub zog hluav taws xob xws li ib-theem grounding, lub sij hawm ntev capacitive cuam tshuam, thiab load shedding, lub hwj chim zaus voltage yuav nce los yog ib tug transient overvoltage nrog ib tug ntau dua amplitude yuav generated.Muaj peev xwm tiv taus qee qhov hluav taws xob zaus voltage nce hauv ib lub sijhawm.
Kev siv tub rog:
1. Nws yuav tsum tau muab ntsia ze ntawm sab ntawm lub transformer faib.Cov
hlau oxide ntes (MOA) txuas nrog rau kev sib txuas nrog cov khoom siv hluav taws xob xa tawm thaum lub sijhawm ua haujlwm ib txwm muaj, nrog rau sab sauv kawg txuas nrog txoj kab thiab qis kawg hauv av.Thaum muaj ib qho overvoltage ntawm txoj kab, qhov kev faib hluav taws xob tam sim no yuav tiv thaiv peb qhov hluav taws xob poob tawm thaum lub overvoltage dhau los ntawm tus ntes, cov hlau lead thiab cov khoom siv hauv av, uas yog hu ua residual voltage.Nyob rau hauv peb qhov chaw ntawm overvoltage, qhov seem voltage ntawm tus ntes yog cuam tshuam rau nws tus kheej kev ua tau zoo, thiab nws cov nqi hluav taws xob seem yog qhov tseeb.Cov hluav taws xob seem ntawm cov khoom siv hauv av tuaj yeem raug tshem tawm los ntawm kev txuas cov khoom siv hauv av mus rau lub plhaub hloov pauv, thiab tom qab ntawd txuas mus rau cov khoom siv hauv av.Yuav ua li cas txo qhov seem ntawm qhov hluav taws xob ntawm cov hlau lead ua tus yuam sij rau kev tiv thaiv kev faib tawm transformer.Lub impedance ntawm cov hlau lead yog cuam tshuam nrog qhov zaus ntawm qhov tam sim no dhau los ntawm nws.Qhov siab dua qhov zaus, qhov inductance ntawm cov hlau muaj zog thiab qhov impedance ntau dua.Nws tuaj yeem pom los ntawm U = IR tias txhawm rau txo qhov seem seem ntawm cov hlau lead, qhov impedance ntawm cov hlau lead yuav tsum raug txo, thiab txoj hauv kev ua tau los txo qhov impedance ntawm cov hlau lead yog kom luv qhov kev ncua deb ntawm MOA thiab cov tis transformer kom txo tau qhov impedance ntawm cov hlau lead thiab txo qhov voltage poob ntawm cov hlau lead, yog li nws yog tsim nyog yuav tsum tau muab ntsia tau ze rau lub tis transformer.
2. Qhov tsawg-voltage sab ntawm lub transformer faib yuav tsum tau ntsia
Yog tias tsis muaj MOA ntsia rau ntawm qhov qis-voltage ntawm lub tshuab hluav taws xob faib hluav taws xob, thaum lub siab-voltage sab surge arrester tso tawm hluav taws xob tam sim no rau lub ntiaj teb, qhov hluav taws xob poob yuav tshwm sim ntawm cov khoom siv hauv av, thiab qhov hluav taws xob poob yuav ua rau. qhov nruab nrab ntawm qhov qis-voltage sab winding los ntawm kev faib khoom transformer plhaub tib lub sijhawm.Yog li ntawd, xob laim tam sim no ntws nyob rau hauv qis-voltage sab winding yuav ua rau muaj peev xwm loj (txog 1000 kV) nyob rau hauv high-voltage sab winding raws li qhov kev hloov pauv, thiab qhov peev xwm no yuav raug superimposed nrog lub teeb hluav taws xob ntawm qhov siab. -voltage sab winding, uas ua rau lub nruab nrab point peev xwm ntawm high-voltage sab winding nce, rhuav tshem lub rwb thaiv tsev nyob ze ntawm qhov nruab nrab point.Yog tias MOA tau teeb tsa rau sab qis-voltage, thaum lub siab-voltage sab MOA tso tawm kom nce lub peev xwm ntawm cov khoom siv hauv av mus rau ib qho nqi, qhov qis-voltage sab MOA pib tawm, kom qhov sib txawv ntawm qhov tsawg. -voltage sab winding qhov hluav taws xob davhlau ya nyob twg thiab nws qhov nruab nrab taw tes thiab lub plhaub txo qis, kom tshem tawm lossis txo qhov cuam tshuam ntawm "rov qab hloov pauv" muaj peev xwm.
3. Lub MOA hauv av xaim yuav tsum tau txuas nrog lub plhaub hloov pauv
.MOA av xaim yuav tsum tau txuas ncaj qha mus rau lub plhaub hloov pauv, thiab tom qab ntawd lub plhaub yuav tsum txuas nrog hauv av.Nws yog qhov tsis ncaj ncees rau kev txuas cov xaim hauv av ntawm tus ntes ncaj qha mus rau hauv av, thiab tom qab ntawd coj lwm txoj hauv av los ntawm pawg hauv av mus rau lub plhaub hloov pauv.Tsis tas li ntawd, hauv av xaim ntawm tus ntes yuav tsum yog luv li sai tau kom txo tau qhov seem seem.
4. Ua raws li cov cai ntawm cov kev cai rau kev kuaj xyuas tsis tu ncua.
Ib ntus ntsuas cov rwb thaiv tsev tiv thaiv thiab cov xau tam sim no ntawm MOA.Thaum MOA rwb thaiv tsev tiv thaiv tau txo qis los yog tawg, nws yuav tsum tau hloov tam sim ntawd kom ntseeg tau tias muaj kev nyab xeeb thiab noj qab nyob zoo ntawm cov khoom siv hluav taws xob.
Arrester kev ua haujlwm thiab kev saib xyuas:
Hauv kev ua haujlwm txhua hnub, cov pa phem ntawm lub tes tsho plooj (porcelain) nto ntawm tus ntes yuav tsum raug kuaj xyuas, vim tias thaum lub tes tsho plooj (porcelain sleeve deg) muaj kuab heev, qhov hluav taws xob faib tawm yuav tsis sib xws.Nyob rau hauv ib tug ntes nrog parallel shunt tsis kam, thaum lub voltage tis ntawm ib tug ntawm cov Cheebtsam nce, lub tam sim no dhau los ntawm nws parallel tsis kam yuav nce ho, uas yuav hlawv tawm lub parallel tsis kam thiab ua rau tsis ua hauj lwm.Tsis tas li ntawd, nws kuj tseem tuaj yeem cuam tshuam rau qhov kev ua haujlwm ntawm kev tua hluav taws ntawm lub valve ntes.Yog li ntawd, thaum lub ntsej muag ntawm lub tes tsho porcelain lub tes tsho muaj kuab paug, nws yuav tsum tau muab ntxuav kom huv si raws sijhawm.
Xyuas cov hlau lead thiab grounding down-lead ntawm tus ntes, seb puas muaj cov cim hlawv thiab tawg cov hlua, thiab seb lub kaw lus kaw puas raug hlawv.Los ntawm kev tshuaj xyuas no, nws yog qhov yooj yim tshaj plaws los nrhiav qhov tsis pom kev ntawm tus neeg ntes;Ingress ntawm dej thiab ntub dej tuaj yeem ua rau muaj kev sib tsoo yooj yim, yog li xyuas seb cov cement sib txuas ntawm qhov sib koom ua ke ntawm lub tes tsho plooj (porcelain) thiab flange yog nruj, thiab nruab ib lub hau npog tsis zoo ntawm cov hlau lead ntawm 10 kV valve-hom ntes kom tiv thaiv cov dej nag los ntawm nkag mus;xyuas lub ntes thiab tiv thaiv hluav taws xob Txawm hais tias qhov hluav taws xob nyob deb ntawm cov cuab yeej ua tau raws li qhov yuav tsum tau ua, lub teeb ntes hluav taws xob yuav tsum nyob ze li qhov ua tau rau cov khoom siv hluav taws xob tiv thaiv, thiab lub teeb ntes hluav taws xob yuav tsum xyuas qhov kev txiav txim ntawm lub kaw lus tom qab cua daj cua dub;tshawb xyuas qhov xau tam sim no, thiab thaum lub zog hluav taws xob tawm hluav taws xob ntau dua lossis tsawg dua li tus qauv tus nqi, nws yuav tsum tau kho dua thiab kuaj;thaum lub kaw lus tso tawm ntau dhau lawm, nws yuav tsum tau kho dua;yog tias muaj cov kab nrib pleb ntawm qhov sib koom ntawm lub tes tsho plooj (porcelain) thiab cov cement;Thaum lub flange phaj thiab cov roj hmab ncoo poob, nws yuav tsum tau kho dua.
Lub rwb thaiv tsev tiv thaiv ntawm tus ntes yuav tsum tau xyuas tsis tu ncua.Lub 2500 volt rwb thaiv tsev meter yog siv rau kev ntsuas, thiab cov nqi ntsuas tau muab piv nrog cov txiaj ntsig yav dhau los.Yog tias tsis muaj qhov hloov pauv pom tseeb, nws tuaj yeem txuas ntxiv mus ua haujlwm.Thaum cov rwb thaiv tsev tsis kam poob qis, nws feem ntau tshwm sim los ntawm kev sib khi tsis zoo thiab damp lossis qhov hluav taws xob luv luv.Thaum nws qis dua tus nqi tsim nyog, yuav tsum tau ua ib qho kev ntsuam xyuas tus yam ntxwv;Thaum lub rwb thaiv tsev tsis kam nce ntau, nws feem ntau yog vim kev sib cuag tsis zoo lossis tawg ntawm kev sib txuas sab hauv nrog rau lub caij nplooj ntoos hlav so thiab kev sib cais sab hauv.
Txhawm rau txhawm rau nrhiav pom qhov tsis xws luag hauv lub valve ntes nyob rau lub sijhawm, yuav tsum kuaj xyuas kev tiv thaiv ua ntej lub caij ntuj nag xob nag cua txhua xyoo.
Post lub sij hawm: Dec-15-2022