Published On: Sat, Nov 14th, 2020


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.

About the Author

- Radoje - Rade Jankovic Electrician, Electrical Technician, Electrical Engineer, PhD, Ecologist, Environmentalist, Designer, Educator, Investigator... Today PROFESSIONAL TECHNICAL WRITER AND DOCUMENTATOR Massive practical experience in almost all fields of electrical engineering over 40 years. My International education group in Facebook: EEEW - ELECTRICAL & ELECTRONIC EDUCATION WORLD where published more than 8000 small or bigger articles, lessons, technical advice, projects, technical calculations, test questions with and without answers, illustrated test questions with and without answers; all my original works and few thousands of may original photos from practice, drawings, circuit diagrams, environmental lessons and examples from everyday practice etc., etc.

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