Dab tsi yog cov ntawv thov thiab kev ceev faj ntawm cov resistors?

Lub hom phiaj ntawm kev siv varistors sib txawv nyob rau hauv ntau qhov kev siv scenarios, thiab qhov voltage / tam sim no kev ntxhov siab ua rau lawv tsis zoo ib yam. Yog li ntawd, cov kev cai rau varistors kuj txawv. Nws yog ib qho tseem ceeb kom paub qhov txawv ntawm qhov sib txawv rau kev siv kom raug. Raws li kev siv sib txawv, varistors tuaj yeem muab faib ua ob pawg: kev tiv thaiv varistors thiab circuit functional varistors.
Kev tiv thaiv varistor
1. Sib txawv ntawm varistors siv rau kev tiv thaiv hluav taws xob, kev tiv thaiv kab teeb liab, thiab cov ntaub ntawv kab tiv thaiv, vim lawv yuav tsum ua raws li cov qauv kev sib txawv.
2. Raws li qhov sib txawv nruam kev khiav hauj lwm voltages thov mus rau lub varistor, varistors siv nyob rau hauv lub hwj chim kab yuav muab faib ua ob hom: AC thiab DC. Cov yam ntxwv kev laus ntawm varistors nyob rau hauv ob qhov kev ntxhov siab no txawv.
3. Raws li qhov txawv txawv txawv overvoltage yam ntxwv uas varistors tuaj yeem tiv taus, varistors tuaj yeem muab faib ua peb hom: surge suppression type, high-power type, thiab high-energy type.
(1) Surge suppression type: yog hais txog lub varistor siv los tiv thaiv cov overvoltages xws li xob laim overvoltage thiab kev ua haujlwm overvoltage. Qhov tshwm sim ntawm xws li overvoltages yog random, tsis periodic, thiab lub ncov tus nqi ntawm tam sim no thiab voltage yuav loj. Feem ntau ntawm cov varistors nyob rau hauv pawg no.
(2) Hom fais fab loj: yog hais txog lub varistor siv los nqus cov pab pawg mem tes txuas ntxiv uas tshwm sim ib ntus, xws li varistors txuas nrog rau qhov sib txuas mus rau qhov hloov hluav taws xob hloov pauv. Ntawm no, lub impulse voltage tshwm sim ib ntus, thiab lub sijhawm paub. Tus nqi hluav taws xob feem ntau tuaj yeem suav tau, thiab qhov siab tshaj qhov hluav taws xob tsis loj, tab sis vim nws qhov tshwm sim ntau zaus, nws lub zog nruab nrab yog qhov loj heev.
Varistor
(1) Hom lub zog siab: yog hais txog lub zog-rhiab heev voltage regulator siv los nqus lub zog sib nqus los ntawm cov inductive coils loj xws li lub tshuab hluav taws xob excitation coils thiab nqa electromagnet coils. Rau cov kev siv xws li, lub ntsiab lus qhia yog lub zog nqus peev xwm.
Kev tiv thaiv kev ua haujlwm ntawm varistors tuaj yeem rov ua dua nyob rau hauv ntau daim ntawv thov, tab sis qee zaum lawv kuj tau ua rau cov khoom siv tiv thaiv pov tseg xws li fuses tam sim no. Piv txwv li, varistors nrog luv-circuit contacts txuas nyob rau hauv parallel rau tej yam tam sim no transformer loads.
(1) Kev ceev faj rau cov resistors: Ua ntej siv, cov resistors yuav tsum tau kuaj xyuas lawv cov kev ua tau zoo los ntawm kev ntsuas seb tus nqi tiv thaiv tiag tiag puas yog tus nqi nominal thiab seb qhov yuam kev puas nyob hauv qhov kev tso cai. Cov txheej txheem yog siv qhov kev tiv thaiv ntau ntawm multimeter rau kev ntsuas.
(2) Thaum ntsuas cov resistors, ob lub ntsiab lus yuav tsum tau muab sau tseg: 1. Qhov ntau yuav tsum tau txiav txim siab raws li qhov ntsuas qhov ntsuas qhov ntsuas, kom tus taw tes qhia qhov nruab nrab ntawm txoj kab ntsuas kom yooj yim saib. 2. Tom qab txiav txim siab qhov ntau ntawm qhov kev tiv thaiv, nws yog ib qho tsim nyog yuav tsum tau ua qhov kev hloov kho xoom los ntawm luv luv Circuit Court ntawm ob qhov kev sojntsuam (ncaj nraim kov ib leeg), kho qhov "zero adjustment" ntaus ntawv kom tus pointer kom raug taw tes rau lub "{{3. } }" ntawm Ω scale kab, thiab tom qab ntawd ntsuas tus nqi ntawm cov resistor. Tsis tas li ntawd, ceev faj tsis txhob kov ob qhov kawg ntawm cov resistor lossis cov hlau ntawm qhov kev sojntsuam nrog koj txhais tes. Txwv tsis pub, nws yuav ua rau kev xeem yuam kev. Tus nqi kuj ntsuas nrog ib tug multimeter yog ze rau tus nqi nominal. Nws tuaj yeem suav hais tias qhov zoo yog qhov zoo, tab sis yog tias muaj qhov sib txawv ntau dhau los yog tsis muaj kev sib txuas ntawm txhua qhov, nws yog qhov phem.