Qhov sib txawv ntawm zinc oxide arrester thiab lub luj tshib arrester

Qhov txawv ntawmcov khoom siv tiv thaiv zinc oxidethiablub luj tshib nres

1. (1) Txoj cai ua haujlwm ntawm lub valve-hom arrester:
Thaum lub kaw lus zoo li qub, qhov sib txawv ntawm lub txim hluav taws xob cais cov phaj valve tsis kam ntawm lub tsheb npav ua haujlwm, yog li ntawd kom tsis txhob hlawv cov phaj valve tsis kam vim yog qhov tam sim no tsim nyob rau hauv lub phaj valve tsis kam los ntawm lub zog ua haujlwm.
Thaum lub zog hluav taws xob ntawm lub tsheb npav ua haujlwm tshaj qhov hluav taws xob tawg, qhov sib txawv ntawm lub txim hluav taws xob yuav raug rhuav tshem thiab ua rau lub zog hluav taws xob ntws mus rau hauv av los ntawm qhov tsis kam ntawm lub phaj valve. Lub sijhawm no, qhov tsis kam ntawm lub phaj valve yuav txo qis kom txo qhov tsis kam ntawm nws ob qho kawg. Lub siab seem tsim.
Tom qab lub xob laim ploj mus, qhov hluav taws xob uas ua rau lub phaj valve tsis kam yog lub zog zaus voltage. Lub sijhawm no, tus nqi tsis kam ntawm lub phaj valve tsis kam yuav nce ntxiv, txwv tsis pub lub zog zaus tsis txav mus los kom ua rau lub arc tua tau sai thiab ntseeg tau.

(2) Lub valve arrester yog tsim los ntawm ntau lub qhov hluav taws xob thiab cov phaj valve resistors hauv series.
Qhov kev ncua deb ntawm qhov sib txawv ntawm lub txim hluav taws xob me me, lub teb hluav taws xob zoo ib yam li lub teb hluav taws xob sib xws, qhov volt-second yam ntxwv yog tiaj tus, thiab kev sib koom ua ke ntawm kev rwb thaiv tsev yooj yim kom paub. Tsis tas li ntawd, ntau qhov sib txawv ua rau lub arc faib thaum lub zog zaus txuas ntxiv mus. Piv nrog rau lub arc ntev, lub arc luv luv yooj yim dua los txiav, thiab lub peev xwm rov qab tau ntawm qhov sib txawv ntawm kev rwb thaiv tsev tau zoo dua.
Qhov muaj qhov tsis kam ntawm lub phaj valve tiv thaiv cov nthwv dej uas tsis zoo rau kev rwb thaiv tsev. Nws qhov tsis yog-linearity ua rau nws qhia qhov tsis kam qis thaum hla lub teeb hluav taws xob kom txwv qhov seem voltage ntawm lub arrester thiab txhim kho kev ua haujlwm tiv thaiv; thaum hla lub zog zaus freewheeling, nws qhia qhov tsis kam siab thiab qhov voltage yog tas li kom txwv lub zog zaus freewheeling thiab txhim kho kev ua haujlwm tua hluav taws xob.

2. (1) Txoj cai ua haujlwm ntawm zinc oxide arrester:
Nyob rau hauv qhov kev ua ntawm lub zog ua haujlwm, qhov tam sim no ntws los ntawm ZnO valve yog tsawg dua 1mA (lub ntsiab lus tseem ceeb yog qhov tam sim no capacitive), uas yog sib npaug rau lub insulator thiab yuav tsis hlawv lub valve, yog li qhov hluav taws xob ua haujlwm tuaj yeem raug cais tawm yam tsis muaj qhov sib txawv.
Thaum lub zog hluav taws xob siv rau lub valve ZnO tshaj qhov nqi (lub zog hluav taws xob pib ua haujlwm U1mA), "on" yuav tshwm sim. Tom qab "on", qhov tsis kam ntawm lub valve ZnO yog me heev, thiab lub zog hluav taws xob seem yog cuam tshuam nrog cov tam sim no ntws los ntawm nws. Yeej tsis muaj feem cuam tshuam.
Thaum lub zog hluav taws xob siv poob qis dua qhov hluav taws xob ua haujlwm, qhov "on" ntawm ZnO valve phaj raug kaw, uas sib npaug rau lub insulator, yog li tsis muaj lub zog zaus freewheeling.
Qhov no yog qhov laj thawj vim li cas MOA thiaj li ua tiav qhov dej ntws tsis muaj kev ywj pheej. (Lub xob laim tam sim no dhau los ua lub insulator yav dhau los, yog li tsuas yog lub xob laim tam sim no hla dhau ZnO valve phaj)
Piv nrog cov li qub silicon carbide SiC, ZnO li qub muaj cov yam ntxwv zoo tagnrho nonlinear volt-ampere.

(2) Piv nrog rau cov khoom siv ib txwm muaj SiC valve disc thiab series gap, zinc oxide gapless arrester muaj cov txiaj ntsig zoo li nram no:
①Simple qauv, haum rau kev tsim khoom loj, me me, lub teeb yuag thiab tus nqi qis.
② Kev ua tau zoo tshaj plaws ntawm kev tiv thaiv. Vim tias lub ZnO valve muaj cov yam ntxwv zoo heev ntawm volt-ampere, qhov hluav taws xob seem qis dua; nws tuaj yeem tso tawm lub zog thaum lub sijhawm overvoltage tag nrho, thiab tsis muaj hluav taws xob, yog li tsis muaj kev ncua sijhawm tso tawm, thiab nws muaj cov yam ntxwv zoo ntawm kev teb nthwv dej, tshwj xeeb tshaj yog rau GIS Kev Tiv Thaiv ntawm cov chaw hloov pauv roj thiab DC systems.
③Muaj peev xwm tiv taus kev ua ntau zaus, tsuas yog nqus tau lub zog hluav taws xob ntau dhau xwb, tsis tas yuav nqus lub zog ywj pheej.
④Muaj peev xwm ntws tau ntau. Lub peev xwm ntws tau ib cheeb tsam ntawm lub ZnO valve yog 4 txog 5 npaug ntawm lub SiC valve. Nws tuaj yeem siv los ua kev tiv thaiv thaub qab rau kev overvoltage sab hauv.
⑤ Zoo tiv taus cov av qias. Vim tias tsis muaj qhov sib txawv ntawm cov koob, qhov teeb meem ntawm qhov hluav taws xob tsis ruaj khov ntawm qhov sib txawv ntawm cov koob vim muaj kev ua qias tsis sib xws ntawm qhov chaw ntawm lub tes tsho porcelain tuaj yeem zam tau, thiab nws yooj yim los tsim cov khoom tiv thaiv kev ua qias tuaj thiab cov khoom siv ntxuav lub neej. (Tsis cuam tshuam los ntawm kev ua qias tuaj ntawm qhov chaw)