nkhani

Pa chifukwa cha kutentha kwa varistor

Mu dera, udindo wa varistor ndi: choyamba, overvoltage chitetezo; chachiwiri, zofunika kukana mphezi; chachitatu, zofunika kuyezetsa chitetezo. Ndiye n'chifukwa chiyani varistor kuwotcha mu dera? Chifukwa chiyani?

Ma Varistors nthawi zambiri amatenga gawo pachitetezo chamagetsi m'mabwalo, ndipo amatha kugwiritsidwa ntchito ndi ma fuse pakuwomba kwamphezi kapena chitetezo china chamagetsi. Nthawi zambiri amagwiritsidwa ntchito poteteza mphezi. Pamene overvoltage ikuchitika, varistor idzasweka ndipo dera lalifupi lidzachitika, kotero kuti voteji pa malekezero onse a varistor adzakhala clamped pa malo otsika. Pa nthawi yomweyo, overcurrent chifukwa cha dera lalifupi adzawotcha fuse kutsogolo kapena Kukakamiza mpweya lophimba ulendo, potero mokakamiza kudula magetsi. Nthawi zambiri, zimakhala ndi zotsatira zochepa pazigawo zina zamagetsi pambuyo pa kuwonongeka, ingoyang'anani zigawo zomwe zimagwirizanitsidwa nazo. Pankhani ya kuwonongeka kwa puncture, fuseyi idzawomba.

Pamene voteji ili yochepa kuposa voliyumu ya voliyumu ya varistor, kukana kwa varistor sikungatheke ndipo kulibe mphamvu mu dera. Pamene voteji mu dera kuposa varistor voteji, kukana kwa varistor adzatsika mofulumira, amene adzakhala mbali ya shunt ndi voteji kuchepetsa, ndipo fuyusi mu dera lomwelo adzawombedwa kuti achite zoteteza. Ngati palibe fuse mu dera, varistor idzaphulika mwachindunji, kuwonongeka ndi kulephera, kutaya mphamvu yake yotetezera, ndikuchititsa kuti dera lotsatira liwotchedwe.
Zifukwa zitatu zomwe zili pamwambazi ndizifukwa zomwe zimapangitsa kuti varistor aziwotcha kuzungulira dera. Chisamaliro chapadera chiyenera kuperekedwa ku ntchito m'tsogolomu kuti tipewe kuwonongeka kwa capacitor.