Mai shi ne ELCB?

Me kadan ELCB?

Ta'arifin ELCB

ELCB (Earth-leakage circuit breaker) shine tsuman hukuma da ake amfani da shi a cikin gagarumin karamin kula (daga cikin gida zuwa gwamnati) don in iya kare yawan tsanani. Ana sanya yawan tsanani na musamman a cikin abincin karamin kula, kuma ya koye rawwaru idan an sanar da yawan tsanani mai kyau.

ELCBs ke taimaka wajen sanya yawan karamin kula da kuma yadda ake fuskantar hukuma a cikin gagarumin karamin kula wanda za a iya kara yawan tsanani wa mutane mafi girma da ake duba rawwaru. Akwai abubuwan ELCB biyu - ELCB na yawan tsanani da ELCB na yawan karamin kula.

ELCB na Yawan Tsanani

Prinsipin aiki na ELCB na yawan tsanani shine murabba. Babban tushen coil na relay ta hankali abincin karamin kula, kuma babban tushen mafi na ta hankali dukkan da take.

Idan fuskantar hukuma ko karamin kula na yawan tsanani ya haifar da abincin karamin kula, yana faruwa yawan tsanani a bayan tushen coil da dukkan. Wannan yawan tsanani ne yake yi karshen karkashin aiki a cikin coil na relay.

Idan yawan tsanani ya faruwa har zuwa yadda aka baka, yakan yi karshen karkashin aiki a cikin coil na relay don in iya koye rawwaru da ya koye circuit breaker don in iya kare karamin kula daga abinci.

Wannan tsuman hukuma na iya sanya da kuma kare yawan karamin kula kawai a cikin abinci da ya kunshi. Ba zan iya sanya yawan karamin kula a wasu wurare na gagarumin kula ba. Duba Electrical MCQs don in iya samun cikakken hukumomin ELCBs.

ELCB na Yawan Karamin Kula (RCCB)

Prinsipin aiki na ELCB na yawan karamin kula ko RCCB shine murabba kamar ELCB na yawan tsanani amma teoriya na iya kawo muhimmanci da RCDs ko RCCBs suka fi karfin ELCB.

ELCBs akwai biyu: ELCB na yawan tsanani da ELCB na yawan karamin kula. ELCB na yawan tsanani sunan ELCB na musamman, kuma ELCB na yawan karamin kula sunan RCDs ko RCCBs. A RCCBs, core na current transformer (CT) ana yi aiki da phase wire da kuma neutral wire.

Single Phase Residual Current ELCB. Polarity na phase winding da neutral winding a core na iya zama cewa, a yanayi na iya kawo karfi a winding na biyu.

Don haka, a yanayi na iya kawo cewa, a yanayi na iya koye karamin kula a kan phase wire kuma a kan neutral wire idan ba a faruwa yawan karamin kula ba.

Saboda abubuwan karamin kula na biyu sunan daidai, mmf na resultanta na biyu shine zero-ideally. Coil na relay ta hankali winding na uku a CT core a kan secondary. Terminal na winding na biyu ta hankali system na relay.

A yanayi ba za a faruwa karamin kula a winding na uku saboda ba a faruwa flux a core da phase da neutral currents na daidai.

Idan yawan karamin kula ya faruwa, wata batu na phase current ya faruwa a kan dukkan da kuma neutral wire. Saboda haka, magnitude na neutral current da take faruwa a kan RCCB ba ce da phase current da take faruwa.

Idan imbalance ya faruwa har zuwa limitin da aka baka, karamin kula a winding na uku ya faruwa har zuwa yadda kan ya yi karshen karkashin aiki a cikin electromagnetic relay. Wannan relay ne ke koye rawwaru da ya koye circuit breaker don in iya kare karamin kula daga abinci.

Residual current circuit breaker yana iya a kiran da residual current device (RCD) idan ake duba device na RCCB da koye circuit breaker. Yana nufin cewa, abubuwan RCCB na biyu kawai sunan RCD.