Miniature circuit breaker, yomwe imagwiritsidwa ntchito kuteteza chitetezo chanu

Miniature circuit breaker ndi mtundu wa switchgear yamagetsi otsika, omwe amagwiritsidwa ntchito kuteteza zida zamagetsi ndi chitetezo chamunthu.

Zing'onozing'ono zowonongeka zimatha kuikidwa m'nyumba (mwachitsanzo, m'makabati ogawa) kapena kunja (mwachitsanzo, m'mabokosi ogawa).

1. Pali mitundu itatu ya njira zoyikapo: zosasunthika, zam'manja ndi zoyimitsidwa.

2. Mphamvu yamagetsi yamagetsi yamagetsi imagawidwa m'mitundu ya N ndi P, N ndi yomwe ili ndi chiwerengero chachikulu chamakono, P ndi yomwe ili ndi chiwerengero chochepa, ndipo N imagawidwa mu L, L, N ndi 1,2. -3A, ndi B ndi 2A malinga ndi oveteredwa panopa.

Zowonongeka zazing'ono zitha kugwiritsidwa ntchito m'nyumba zogona, maofesi, mafakitale ndi malo ena.

I. Gulu la ophwanya madera ang'onoang'ono.

(1) Yosankhidwa ndi Arc Extinguishing Medium: Pali njira zitatu zozimitsa za Arc: Air, Vacuum kapena Air vacuum Mixing.

Makina a mpweya ndi oyenera ma AC low-voltage yogawa ma voltage otsika mpaka 690V ndipo sangathe kupirira kulephera kwamtundu uliwonse kwakanthawi kochepa pamene mizere ya ndale (N) ndi zero (D) yalumikizidwa, popeza pali mipweya yambiri ya inert mkati. mpweya.

Kuphatikiza apo, makina okhala ndi ma voltages ovotera a 690V (N) kapena apamwamba (pamwamba pa 1800V) sangathe kudutsa mapaipi achitsulo kapena mbale.

Vacuum system yoyenera voliyumu yovotera mpaka 660V, katundu wambiri ndipo palibe mzere wolakwika.

(2) Zodziwika ndi njira yogwiritsira ntchito: pali mitundu iwiri: ntchito yamanja ndi ntchito yokha.

Kugwira ntchito pamanja: kumagwiritsidwa ntchito kulumikiza kapena kuswa dera lozungulira komanso dera losazolowereka, wogwiritsa ntchito pamanja amadutsa posinthira pamanja, chogwirira kapena batani kuti akwaniritse.

Kuchita zodziwikiratu: kudzera pa chosinthira chamagetsi pa batani lowongolera, kuti mukwaniritse zofunikira.

(3) Zosankhidwa molingana ndi mfundo yoyendetsera ntchito: molingana ndi njira yolumikizirana pakati pa olumikizana ndi njira yochitira, amagawidwa m'mitundu iwiri;

Chimodzi ndi makina;ina ndi electrodynamic.

Makina ophwanyira dera amagwiritsidwa ntchito makamaka pa 50HZ AC, 660V DC, makina apamwamba kwambiri.

Electrodynamic action circuit breaker imagwiritsidwa ntchito makamaka mu AC 1000V system kapena low voltage distribution line;mitundu ina monga fuse, reactors, masiwichi akhoza over-panopa chitetezo ndi kulamulira.

Electrodynamic action circuit breaker imagawidwa kukhala chipangizo chotumizira mpweya ndi chida chotumizira zida.

(4) Malingana ndi mtundu wa arc kuzimitsa sing'anga, pali mitundu itatu: mpweya kuyaka arc kuzimitsa dongosolo, mpweya arc kuzimitsa dongosolo ndi magetsi inert arc kuzimitsa chipinda chophatikiza dongosolo dongosolo.

Njira zozimitsa za inert arc zitha kugawidwa m'magulu awiri: kudzipatula kwa mzere wosalowerera ndale komanso kudzipatula kwa mzere wosalowerera.Zakale zitha kugwiritsidwa ntchito m'mabwalo osalowerera ndale pazolinga zosiyanasiyana, zomalizazi sizingagwiritsidwe ntchito pamizere yonse yopanda ndale (monga nyumba zogona ndi maofesi), ndipo zomalizazi zimagwiritsidwa ntchito makamaka mumitundu yonse yamagetsi amagetsi (monga nyumba zamafakitale ndi malo osungiramo zinthu) kupatula zokhalamo.

Dongosolo lozimitsa magetsi la arc lingagwiritsidwe ntchito m'mabwalo onse omwe amafunika kuteteza chingwe chamagetsi ku ngozi yamagetsi;itha kugwiritsidwa ntchito m'mabwalo onse omwe amafunikira kuteteza chingwe chamagetsi ku ngozi yamagetsi popanda ntchito yoteteza kapena popanda ntchito yoteteza pansi pazikhalidwe zogwirira ntchito.Dongosolo lozimitsa lamagetsi la arc likhoza kupanga "mzere waufupi" pakati pa gwero la mphamvu, katundu ndi mzere wosalowerera, womwe ungathe kudula cholakwikacho mwamsanga kuti uchepetse kuwonjezereka kowonjezereka.

(5) Gulu ndi ntchito: pali ophwanya unipolar ndi multipolar;mitundu yonseyi ingagwiritsidwe ntchito pamizere yamagetsi kapena makabati ogawa, otchedwa single-phase and multiphase circuit breakers (ndiko kuti, kukhala ndi magawo awiri kapena kuposerapo) ndi ophwanya magawo awiri (omwe amadziwikanso kuti ophwanya magawo atatu);ophwanya magawo a gawo limodzi ndi magawo awiri ali ndi magawo awo apadera owongolera, monga: magawo atatu apano oletsa owononga, etc.;zowononga magawo awiri zimagwiritsidwa ntchito makamaka pamakina ogawa a 10 kV kapena pansi, kapena ngati zosinthira m'makabati ogawa a 10 kV kapena pansi.

(6) Zosankhidwa molingana ndi momwe amagwiritsidwira ntchito: pali zing'onozing'ono ndi zazikulu zomwe zimagwiritsidwa ntchito panopa;