Published On: Sat, Nov 14th, 2020

KOMBINOVANE ZAŠTITNE SKLOPKE (KZS)

Kombinovane zaštitne sklopke (KZS)

Za ovu svrhu obradio prema katalogu Radoje Janković.

Kombinirane zaštitne sklopke ili u danjem tekstu KZS, su uređaji koji objedinjuju funkciju Automatskog zaštitnog prekidača i zaštitnog uređaja diferencijalne struje RCD ili FID. Odličan su odabir ukoliko se korisnik suočava sa problemom nedostatka prostora u razdjelniku, jer se u stvari ovdje radi o dva uređaja u jednom kućištu. RCD zaštitne sklopke reagiraju na diferencijalne struje istovremeno pružajući i nadstrujnu zaštitu.

Schrack-ova KZS u 4-polnoj izvedbi prikazana je na slici 1.

.

Sl. 1.

KZS dolaze u B, C i D karakteristikama isklopa te sa nazivnom diferencijalnom strujom od 10mA, 30mA, 100mA i 300mA.

Takođe postoje i tipovi AC i A kao i izvedbe bez i sa vremenskim zatezanjem isklopa (Tip G).

Kao i kod RCD sklopki, preporuka je da se jednom mjesečno putem TEST tipkala izvede funkcionalna provjera uređaja.

Kombinovana zaštitna sklopka (KZS)

· Tip A (reagira i na pojavu pulsirajućih istosmjernih diferencijalnih struja koje nastupaju iznenada ili polaganim rastom)

· Mogućnost priključka s obje strane

· Mogućnost prigradnje pomoćnog kontakta

· Naponski neovisna

· Obostrano lift- i čeljusne stezaljke

· Svaki pol opremljen je priključkom za viličastu sabirnicu
i vodič do 25 mm2

· Indikator isklopa: ručno/električni (bijelo/plavo)

· Indikator položaja kontakata: zatvoreni/otvoreni (crveno/zeleno)

· Zaštita od pogrešnog ožičenja.

Prema EI C/EN 6 1009

Nazivni napon: Ue 230/400V; 50Hz

Vijek trajanja: električni ≥ 4.000 sklapanja, mehanički ≥ 20.000 sklapanja

Broj polova: tropolni s isključenjem N vodiča

Dozvoljena vrijednost napona: 19 2 – 6 53 V

Nazivna prekidna moć: k 6 A Maks. predosigurači: 10 0 A /Lg gG

Isklopne karakteristike: ,B i D C Nazivna struja: 1 – 6 6 A

Klasa selektivnosti: 3

Tip: A (osjetljiva na na sinusne struje kao i na pojavu pulsirajućih istosmjernih struja)

Okidanje: naponski neovisna sklopka, bez vremenskog zatezanja, otpornost na strujne udare 2 50A 8( /20µs)

Podnosivi udarni napon: U = imp 4 kV (1,2/50µs)

Nazivna diferencijalna struja: I = ∆n 30mA, 100mA i 300 mA

Nazivna diferencijalna struja neisklapanja: I = ∆no 0,5 I∆n

Specijalno učvršćenje: za ID N nosač E N 5 0 0 22

Priključne stezaljke: priključak za viličastu sabirnicu i vodič do 25 mm

Priključni presjek: 2-1 5 mm 2

Zaštita priključka: zaštita od krivog ožičenja

Zaštita od dodira: prema VBG ,4 ÖV E-E N 6

Maks. debljina sabirnica: 2 – 8,0 mm

Stupanj zaštite: RCBO PI 2 ,0 zatvoreni dijelovi IP40

Radno temperaturno područje: 2- ° 5 do C + 4 ° 0 C

Uvjeti okoline: prema EI 6 C 2( 2-8 5…5 °5 9 / C 9…0 5% R )

Autor je koristio kataloške podatke od firme Schrack.

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KOMBINOVANE ZAŠTITNE SKLOPKE (KZS)