Indlela yokukhetha i-breaker circuit efanele?

Ukukhetha okufanelekileI-I-I-circuit breakeridinga ukuhlolwa okuphelele kwamapharamitha wesekethe, izici zomthwalo, indawo yokufaka, kanye nezidingo zokuvikela. Ukucatshangelwa okuyinhloko ukuqinisekisa ukuthi i-voltage elinganiselwe ifana ne-voltage yesistimu, i-current elinganiselwe inkulu kunomthwalo wamanje kodwa ingaphansi komthamo we-conductor ophethe wamanje, kanye nomthamo wokuphuka (i-Icu) uphakeme kunamanje olindelekile wesiyingi esifushane.

Ukukhetha Ipharamitha Ebalulekile

I-Voltage Elinganisiwe: Kumelwe ibe ≥ i-voltage elinganiselwe yomugqa (isb., evame ukusetshenziswa ezindlini ezingu-220V/380V). I-voltage yokukhishwa kwe-undervoltage kufanele ihambisane ne-voltage yesistimu.

Ikalwe okwamanje:

Bala ubukhulu obusebenzayo bamanje bomthwalo (Ib). Khetha aI-I-I-circuit breakerenomthamo wamanje olinganiselwe (In) ohlangabezana nemibandela elandelayo: Ib < Ku-≤ i-conductor yomthamo ophephile wokuthwala wamanje (isb., intambo yethusi engu-6mm² inomthamo wamanje wokuthwala ocishe ube ngu-40A, khetha ≤40A i-circuit breaker).

Umsebenzi okhishiwe uyadingeka ezindaweni ezinezinga lokushisa eliphezulu (>40℃).

Ukuphuka Amandla (Icu):

Kumelwe ibe nkulu kunesilinganiso esiphezulu esilindelwe somugqa we-short-circuit current (Ik), esingabalwa kusetshenziswa amafomula noma ngokubhekisela kumathebula (isb., ngomthamo wesiguquli esingu-1600kVA, Ik≈38.5kA). 3

Beka kuqalaama-ama-circuit breakersnge-Icu ≥ 50kA; ngezicelo zokuhlala, ≥ 6kA yanele.