Mazana ema amperes kune anopfuura 1000 amperes emutoro wemhando, maitiro ekusarudza wedunhu breaker

Molded case circuit breakersdzakatemerwa kubva ku10A kusvika 1600A, uyefuremu redunhu mabreaker (ACB)akatemerwa kubva pa630A kusvika 6300A.Ona molded case circuit breaker uyeair circuit breakeryakayerwa ikozvino inopindirana nzvimbo, dzimwe nguva hauzive nzira yekusarudza.

Pane mitemo shoma pano.

Yekutanga yekugovera sisitimu mune yekugovera sisitimu, iyo ine zvese feed loop uye mota loop.

Chinhu chekudzivirira cheiyo feed circuit breaker ndiyo tambo.Panguva imwecheteyo, chikafucircuit breakerinofanirwa kuona hukama hwekuchengetedza hukama neiyo huru inouyacircuit breakerchechipiri chekugovera sisitimu, saka chikafucircuit breakerinofanirwa kuve nepfupi yedunhu kunonoka S kudzivirira.

Thermomagneticmolded case circuit breakerine zvikamu zviviri chete zvekudzivirira, kureva, kuremedza kunonoka kwenguva refu L parameter uye pfupi dunhu pakarepo I parameter, haina kukodzera kuvharika kwetambo refu yekudyisa, uye kushandisa iyoelectronic molded case circuit breakernezvikamu zvitatu zvekudzivirira.

Kumaseketi emota, shandisa imwe chete magineti yedunhu breaker, kureva, ingori pfupi yekudzivirira yedunhu, hapana overload yekudzivirira yedunhu breaker.Zvinoonekwa, izvi zvakare zvakasiyana kubva kune zvakajairwaplastiki kesi circuit breaker.

Uye zvakare, kana paine yekuzviparadzanisa transformer pakubuda kwekugovera kwekutanga, nekuti iyo transformer inrush ikozvino inenge yakaenzana neiyo pfupi-circuit ikozvino, iyo yakatemerwa ikozvino yedunhu breaker inogona kusarudzwa zvichienderana ne 1.6 times iyo yakatarwa ikozvino ye transformer paunenge uchiverenga.Kana iyo yekuzviparadzanisa transformer ine yakakura kugona,air circuit breakerszvinokwanisika kushandiswa.

Semuenzaniso, 250kVA 0.4kV kusvika 0.4kV isolation transformer, impedance voltage iri 6%, yakayerwa ikozvino ndeye:

Short-circuit current ndeye:

Isu tinopatsanura pfupi-yedunhu ikozvino negumi kuti tiwane 600A, saka isu tinoshandisa dunhu rinotyora neyakayerwa ikozvino ye630A semazuva ese.

Nekudaro, isu tinofunga nezve inokanganisa nguva yekureba kweiyo excitation inrush ikozvino, tinoda kushandisa pfupi yedunhu kunonoka S paramende kunonoka, ipapo 630A yakaumbwa kesi yedunhu breaker haina kunaka, kushandisa 800A furemu redunhu breaker, furemu redunhu redunhu kunonoka kunonoka nguva. refu.

Mukuwedzera, kana uchifunga nezvetambo yekunze, zvakakosha kutarisa kugadzikana kwekupisa kwetambo, izvo zvichawedzera chiyero chemazuva ano chekugadzirisa.

Zvinoonekwa, isu tinofanirwa kufunga kuti ndeupi rudzi rwedunhu redunhu rekusarudza.