Hloov cov khoom siv hluav taws xob varistor xaiv
Lub varistor yog ib qho khoom siv tiv thaiv hluav taws xob. Siv cov yam ntxwv tsis-linear ntawm varistor, thaum lub overvoltage tshwm nyob nruab nrab ntawm tus ncej ntawm lub varistor, lub varistor tuaj yeem clamp qhov hluav taws xob mus rau tus nqi hluav taws xob ruaj khov, thiaj li ua tiav kev tiv thaiv ntawm lub voj voog rov qab. Lub luag haujlwm tseem ceeb: kev tiv thaiv overvoltage, kev tiv thaiv xob laim, inhibit surge tam sim no, nqus cov pa pulse, limiting, high-voltage arc extinguishing, suab nrov, tiv thaiv cov khoom siv semiconductor thiab lwm yam. Lub ntsiab tsis yog: varistor voltage, tam sim no muaj peev xwm, junction capacitance, teb lub sij hawm thiab hais txog.
Lub sij hawm teb ntawm varistor yog ns theem, sai dua lub raj cua tawm, me ntsis qeeb dua lub TVS raj (instantaneous suppression diode), feem ntau yog siv hauv hluav taws xob circuits rau kev tiv thaiv dhau-voltage thiab nws cov lus teb ceev tuaj yeem ua tau raws li qhov yuav tsum tau ua.
Hloov fais fab mov varistor xaiv txoj kev yog raws li nram no:
Txawm hais tias lub varistor tuaj yeem nqus tau ntau lub zog surge, tab sis tsis tuaj yeem tiv taus milliamperes saum toj kawg nkaus tam sim no, thaum siv los tiv thaiv overvoltage yuav tsum coj mus rau hauv tus account. Kev xaiv ntawm varistors, feem ntau xaiv lub nominal voltage rhiab heev V1mA thiab los ntawm-tam sim no muaj peev xwm ntawm ob tsis.
1, a rau qhov ntsuas hluav taws xob hloov hluav taws xob, feem ntau siv tus nqi ntawm 1.2.
2, Vrms rau AC input voltage RMS.
3, b rau varistor yuam kev, feem ntau coj tus nqi ntawm 0.85.
4, C yog cov laus coefficient ntawm cov khoom, feem ntau coj tus nqi ntawm 0.9.
5. √2 yog tus nqi siab tshaj-rau-peak uas yuav tsum tau txiav txim siab hauv AC mob.
6, V1mA yog kwv yees tus nqi ntawm qhov tseeb tus nqi ntawm lub varistor voltage.
7, throughput muaj peev xwm, uas yog, lub ncov tus nqi ntawm cov mem tes tam sim no yog ambient kub ntawm 25 degree, rau cov teev inrush tam sim no waveform thiab tus naj npawb ntawm cov teev inrush tam sim no, variations nyob rau hauv lub varistor voltage tsis tshaj ± 10% ntawm tus nqi pulse tam sim no.
Ua ke nrog cov saum toj no, cia peb saib cov tsis sib xws rau tus qauv naj npawb ntawm varistor hauv Circuit Court no.
07D471K AC300V DC385 Voltage-sensitive fais fab mov 470 (423-517) Txwv fais fab mov 775Vp (v) 10lp (A) Flow-through peev 1200 1 sij hawm (A) 600 2 zaug (A) zog 30 0.25 fais fab (W) 150 hluav taws xob muaj peev xwm 1KN Z (pF).
