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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