Magawo otsika ma voltage circuit breaker: nthawi yayifupi kupirira (Icw), parameter iyi imagwiritsidwa ntchito chiyani?

Kupirira kwakanthawi kochepa (Icw): luso la awowononga derakuti mupirire 0.05, 0.1, 0.25, 0.5 kapena 1s osapunthwa pamagetsi operekedwa, magetsi ocheperako, kapena mphamvu yamagetsi.
Imavoteredwa kwakanthawi kochepa, komwe kumadziwikanso kuti thermal stable current, ndi mphamvu yapano yomwe chophulitsa dera kapena chipangizo china chimatha kupirira kwakanthawi kochepa.Kukula kwake ndi kofanana ndi nthawi yanthawi yayitali ndipo nthawiyo imakhala 3 kapena 4 masekondi.

Icw ndiye chizindikiro cha kukhazikika kwamagetsi komanso kukhazikika kwamafuta kwa ophwanya dera muulendo wochedwa.Ndi ya kalasi B yosokoneza dera.Nthawi zambiri, osachepera VALUE a Icw ndi:

Pamene Mu≤2500A, ndi 12In kapena 5kA,

Pamene mu>2500A, ndi 30kA

(KWA YUW1_2000, Icw ndi 400V, 50kA; ya DW45_3200, Icw ndi 400V, 65kA).

Icw idavotera kwakanthawi kochepa:Wopangayo akuti RMS yolekerera kwakanthawi kochepa komwe imatanthauzidwa ndi nthawi komanso nthawi imatha kuonedwa kuti ndi RMS yolekerera kwa chinthu kwakanthawi kochepa, pansi pamikhalidwe yoyenera, pazida zonse ndi zida zamagetsi.Koma chikhalidwe cha mankhwala osiyanasiyana si chimodzimodzi, tanthauzo la oveteredwa nthawi yochepa kulolerana mtengo wamakono sadzakhala chimodzimodzi, pachimake chake ndi mfundo zotsatirazi:

• Onetsetsani kudalirika kwamagetsi amagetsi;

• Pamaziko owonetsetsa kudalirika kwa kayendedwe ka magetsi, chitetezo cha mankhwala omwewo

Kwa njira yogawa ma voltage otsika, mawonekedwe afupikitsa amtunduwu amatsimikiziridwa ndi nthawi yachidule yomwe ingachitike mu dongosolo pamalo oyikapo komanso nthawi yomwe katunduyo ndi zinthu zina zomwe zili mu dongosololi zitha kupirira.

Muyezo wa Iec60364-4-43 wachitetezo chachifupi chachitetezo chamagetsi ogawa mphamvu momveka bwino: nthawi iliyonse mulupu chifukwa chafupikitsa chifukwa chaposachedwa, sayenera kupitilira pakali pano, mu kondakitala sapitilira kutentha kovomerezeka. nthawi ya kusweka.

Kwa mabwalo afupiafupi osapitilira masekondi 5, nthawi (t) yoti kondakita adzuke kuchoka pa kutentha kwake kovomerezeka mpaka kutentha kwake kovomerezeka kumatha kuwerengedwa motere:

T = (k * S/I) 2K coefficient chuma, S kondakitala dera, I yochepa dera mtengo panopa.

Pamwambapa, sankhani zida otsika-anzanu oveteredwa yochepa kukana mtengo panopa, kuchokera unsembe malo pazipita yochepa dera panopa, kondakitala kapena zipangizo zina mu dongosolo kuchokera opaleshoni kutentha kukwera kwa kutentha akhoza kupirira malire a nthawi, mbali ziwiri izi. kuganizira, pozindikira pazipita lalifupi dera unsembe panopa malo ndi dongosolo akhoza kupirira pazipita yochepa dera panopa wa nthawi, Komanso limatsimikizira yochepa panopa kulekerera zida otsika-voteji pa malo unsembe.

Chifukwa mapangidwe ndi kugwiritsa ntchito zida zosiyanasiyana zamagetsi ndizosiyana, pali zofunika zina zapadera pamtengo wanthawi yochepa pakali pano pokwaniritsa chitetezo chadongosolo:

• Pazida zamagetsi monga mabasi, makabati ogawa magetsi otsika, ndi ma switch otsegula, mtengo wanthawi yayitali suyenera kukhala wotsika kuposa mtengo womwe ukuyembekezeredwa wanthawi yayitali pamalo oyikapo, ndipo nthawi yocheperako iyenera kukhala yocheperako. asakhale amfupi kuposa nthawi yogwiritsira ntchito zida zoteteza mudongosolo.

• Kwa ophwanya madera omwe amagwiritsa ntchito kalasi B, kulekerera kwanthawi yayitali sikuyenera kukhala kochepa kuposa kuchuluka komwe kumayembekezereka kwakanthawi kochepa pa malo oyikapo, ndipo nthawi yanthawi yayitali yololera sikhala yocheperako kuposa nthawi yocheperako. -zida zodzitchinjiriza, ndikuwonetsetsa kusankhidwa ndi zida zoteteza zotsika.

Tsopano, dongosolo mphamvu katundu katundu ndi kuyembekezera yochepa dera kuwonjezeka panopa, kugawa mabasi dongosolo kachulukidwe kuwonjezeka, otsika-voteji magetsi zida miniaturization, ngati kufunafuna yochepa kulolerana panopa pansi pa malire a nthawi yaitali mtengo, Ndipotu, palibe tanthauzo lalikulu lothandiza.

Choncho malinga ndi zotheka pazipita yochepa dera unsembe panopa ndi zipangizo zina mu dongosolo akhoza kupirira pazipita yochepa dera panopa wa nthawi, wololera kusankha zida zamagetsi mu otetezeka pansi malire a nthawi yochepa kukana mtengo panopa, mu malinga ndi 0.5 s Icw values ​​to mayeso akuwoneka kuti atha kukwaniritsa zofunikira zachitetezo chadongosolo komanso kuchita bwino kwambiri.