Multimeter ntsuas txoj kev rau fuse resistor nrhiav kom tau
Fuse resistor yog cov khoom tshwj xeeb nrog ob lub zog ntawm cov resistor thiab fuse. Nws yog sawv cev los ntawm tsab ntawv "RF" lossis "R" hauv Circuit Court.
Kev xaiv ntawm fuse resistor
Nws ob qhov kev ua tau zoo yuav tsum raug txiav txim siab thaum xaiv, thiab nws cov tsis 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 muaj peev xwm fuse sai thaum nws overloaded, thiab 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 ua lub luag haujlwm tiv thaiv.
Lub fused resistor yog ntsuas los ntawm multimeter.
Hauv Circuit Court, thaum lub fuse qhib, nws tuaj yeem txiav txim siab 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 lub nra hnyav dhau thiab qhov tam sim no dhau los ntawm nws dhau. tus nqi ntsuas ntau zaus; Yog tias nws qhov chaw qhib tsis muaj kab, nws qhia tau tias qhov ntws tam sim no tsuas yog sib npaug los yog me ntsis ntau dua li nws cov nqi fuse. Rau kev txiav txim siab ntawm qhov zoo ntawm lub fuse resistor yam tsis muaj kab nyob rau saum npoo, nws tuaj yeem ntsuas nrog kev pab ntawm r × 1 block ntawm multimeter. Txhawm rau kom ntseeg tau qhov tseeb ntawm kev ntsuas, ib qho kawg ntawm fuse resistor yuav tsum tau welded los ntawm Circuit Court. Yog tias qhov ntsuas qhov ntsuas tsis muaj qhov kawg, nws txhais tau tias lub fuse resistor tau ua tsis tiav thiab qhib. Yog tias qhov ntsuas tsis kam nyob deb ntawm tus nqi nominal, nws txhais tau hais tias qhov kev tiv thaiv kuj sib txawv thiab yuav tsum tsis txhob siv dua. Hauv kev saib xyuas, nws pom tias ob peb lub fuse resistors luv luv hauv Circuit Court, uas yuav tsum tau them sai sai rau thaum kuaj.
Classification ntawm fuse resistors
Fuse resistors tuaj yeem muab faib ua cov fuse resistors thiab pov tseg fuse resistors.
(A) rov qab tau fuse resistor
Qhov rov qab tau fuse resistor yog ib qho resistor (los yog cov hlau tsis kam) welded nyob rau hauv series nrog lub caij nplooj ntoos hlav hlau piv (los yog elastic hlau ntawv) nrog tsawg melting point solder, thiab ces kaw nyob rau hauv ib tug cylindrical los yog square plhaub. Muaj ntau hom plhaub, xws li 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, qhov sib koom ua ke ntawm cov fuse resistor melts ua ntej, yog li ntawd lub caij nplooj ntoos hlav hlau hlau (los yog elastic hlau ntawv) yog disconnected ntawm lub resistor. Tom qab tshem tawm qhov kev ua txhaum hauv Circuit Court, tus resistor tuaj yeem txuas rau cov hlau hlau (los yog cov ntawv hlau) raws li qhov xav tau, thiab kev siv ib txwm tuaj yeem rov pib dua.
Feem ntau siv rov qab fuse resistors yog TH series R × 90 series, thiab lwm yam.
(2) Ib zaug fuse resistor
Ib-lub sij hawm fuse resistor, tseem hu ua nonrecoverable fuse resistor, ua raws li ib tug ruaj resistor thaum lub Circuit Court ua hauj lwm ib txwm. Thaum nws ua 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 ib zaug fuse resistor tau tshuab, nws tsis tuaj yeem kho tau txhua lub sijhawm, yog li nws tsuas yog hloov tau nrog lub fuse resistor tshiab. Disposable fuse resistors tuaj yeem muab faib ua hlau-qhov txhab fuse resistors thiab zaj duab xis-hom fuse resistors raws li cov khoom siv los ntawm cov resistors.
1. Hlau-qhov txhab fuse resistor Hlau-qhov txhab fuse resistor belongs rau lub hwj chim-hom glazed resistor, uas muaj ib tug me me kuj thiab feem ntau yog siv nyob rau hauv circuits nrog loj ua hauj lwm tam sim no.
Hauv kev tsim cov txheej txheem, ib feem ntawm lub hwj chim-hom glazed resistor yog qhov txhab nrog cov xov hlau nyias los yog nthuav tawm (tsis muaj enamel tiv thaiv txheej). Thaum muaj teeb meem overcurrent tshwm sim nyob rau hauv kev tiv thaiv Circuit Court, nyias hlau ib feem los yog raug ib feem (tsis glaze) ntawm lub resistor yuav hlawv tawm vim overheating, yog li tiv thaiv lub Circuit Court.
2. Membrane fuse resistor Membrane fuse resistor yog feem ntau siv fuse resistor tam sim no, uas tau muab faib ua carbon film fuse resistor, hlau zaj duab xis fuse resistor thiab hlau oxide zaj duab xis fuse resistor.
