Multimeter ntsuas txoj hauv kev txhawm rau txheeb xyuas cov fused resistors
Fusing resistor yog ib qho tshwj xeeb tivthaiv nrog ob txoj haujlwm ntawm resistor thiab fuse. Nws yog sawv cev los ntawm cov ntawv "RF" lossis "R" hauv Circuit Court.
Kev xaiv ntawm Fusing Resistors
Thaum xaiv, nws qhov kev ua tau zoo dua yuav tsum raug txiav txim siab, thiab qhov tsis zoo xws li kev tiv thaiv thiab lub zog yuav tsum raug xaiv raws li cov kev cai tshwj xeeb ntawm Circuit Court. Nws yog ib qho tsim nyog los xyuas kom meej tias nws tuaj yeem fuse sai thaum overloaded, thiab tseem xyuas kom meej tias nws tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev hauv ib txwm muaj. Kev tiv thaiv ntau dhau lossis lub zog tsis tuaj yeem muab kev tiv thaiv.
Multimeter ntsuas txoj hauv kev txhawm rau txheeb xyuas cov fused resistors
Nyob rau hauv ib lub voj voog, thaum lub fuse qhib, kev txiav txim siab tuaj yeem ua raws li kev paub dhau los: yog tias qhov chaw ntawm lub fuse resistor pom tias yog xim dub lossis kub hnyiab, nws tuaj yeem txiav txim siab tias nws cov load hnyav dhau, thiab tam sim no dhau los ntawm nws. tshaj tus nqi ntsuas ntau zaus; Yog tias tsis muaj kab nyob rau ntawm nws qhov chaw thiab muaj qhov qhib Circuit Court, nws qhia tau hais tias tam sim no ntws tsuas yog sib npaug los yog me ntsis ntau dua nws cov nqi fuse. Rau kev txiav txim siab ntawm qhov zoo ntawm fused resistor yam tsis muaj kab nyob rau ntawm qhov chaw, lub tshuab multimeter tuaj yeem siv tau × Los xyuas kom meej qhov ntsuas, ib kawg ntawm lub fuse resistor yuav tsum tau soldered tawm ntawm Circuit Court nyob rau hauv iav 1. Yog hais tias tus nqi kuj ntsuas yog infinite, nws qhia tau hais tias lub fused resistor tau ua tsis tiav thiab qhib Circuit Court. Yog tias qhov ntsuas ntsuas qhov ntsuas qhov sib txawv ntawm tus nqi nominal, nws qhia tau tias qhov kev tiv thaiv tau hloov pauv thiab yuav tsum tsis txhob siv dua. Hauv kev xyaum tu, nws tau pom tias kuj tseem muaj ob peb lub fuse resistors uas tau tawg thiab luv luv hauv Circuit Court, thiab yuav tsum tau them nyiaj thaum kuaj.
Classification ntawm Fusing Resistor
Fusing resistors tuaj yeem muab faib ua ob hom: rov qab tau fuse resistors thiab pov tseg fuse resistors.
(1) Recoverable Fusing Resistor
Recoverable fuse resistors yog cov resistors zoo tib yam (los yog cov xaim tsis kam) uas tau muab tso rau hauv cov kab uas tsis tshua muaj melting point solder thiab caij nplooj ntoos hlav hom hlau piv (los yog cov ntawv hlau elastic), thiab tom qab ntawd muab ntim rau hauv lub plhaub cylindrical lossis square plhaub. Muaj ntau hom plhaub, nrog rau cov hlau thiab pob tshab yas.
Nyob rau hauv qhov ntsuas tam sim no, qhov rov qab tau fuse resistor ua raws li qhov ruaj khov resistor. Thaum ib qho overcurrent tshwm sim nyob rau hauv Circuit Court, lub solder sib koom ntawm lub rov qab fuse resistor thawj melts, ua rau lub caij nplooj ntoos hlav hom hlau hlau (los yog elastic hlau ntawv) disconnect los ntawm lub resistor. Tom qab teeb meem hauv Circuit Court, solder lub resistor rau cov hlau hlau (los yog daim ntawv) raws li yuav tsum tau rov qab siv li qub.
(2) Disposable fuse resistor
Ib tug fuse resistor pov tseg, tseem hu ua irreparable fuse resistor, ua raws li ib tug ruaj resistor thaum lub sij hawm ua hauj lwm Circuit Court. Thaum nws qhov kev khiav hauj lwm tam sim no tshaj qhov ntsuas tam sim no, lub fuse resistor yuav fuse zoo li lub fuse los tiv thaiv Circuit Court. Tom qab lub tshuab hluav taws xob pov tseg pov tseg, nws tsis tuaj yeem kho tau raws sijhawm thiab tsuas yog hloov nrog lub fuse resistor tshiab. Disposable fuse resistors tuaj yeem muab faib ua cov hlau qhov txhab fuse resistors thiab membrane fuse resistors raws li cov khoom siv rau lub cev resistor.
1. Hlau qhov txhab fuse resistors yog lub hwj chim hom glazed resistors nrog me me kuj tseem ceeb thiab feem ntau yog siv nyob rau hauv circuits nrog siab khiav hauj lwm tam sim no.
Thaum lub sij hawm tsim khoom, ib feem ntawm lub hwj chim hom glazed resistor yog qhov txhab nrog nyias hlau los yog raug (tsis muaj enamel tiv thaiv txheej). Nyob rau hauv qhov kev tshwm sim ntawm overcurrent faults nyob rau hauv lub tiv thaiv Circuit Court, nyias hlau los yog raug (tsis muaj glaze txheej) ib feem ntawm lub resistor yuav hlawv vim overheating, muab kev tiv thaiv rau lub Circuit Court.
2. Membrane fuse resistors yog tam sim no feem ntau siv fuse resistors, uas tau muab faib ua ntau hom xws li carbon film fuse resistors, hlau zaj duab xis fuse resistors, thiab hlau oxide zaj duab xis fuse resistors.
