DC CIRCUIT BREAKER NDI FUSE ZOMWE NDI ZIPANGIZO ZOTSATIRA ZAPAMWAMBA

Akatswiri ambiri amagetsi amaganiza kuti ma fuse ndi zida zodzitetezera zakale, pomwe ma DC circuit breaker ndi zida zodzitetezera zapamwamba. Kodi lingaliro ili ndi lolondola?

Zikuoneka kuti nthawi yosinthira khalidwe la fuse ili pafupi ndi nthawi yosinthira khalidwe la mphamvu yophunzirira kutentha ya dera logwira ntchito lotetezedwa, zomwe zikusonyeza kuti lili ndi chitetezo chabwino kwambiri, koma kugwiritsa ntchito kwake sikophweka monga DC circuit breaker. Ngati DC circuit breaker yagwa chifukwa cha overcurrent, ikhoza kutsekedwa kuti ipereke mphamvu pambuyo pokonza mavuto, zomwe ndi zosavuta komanso zosavuta. Fuse iyenera kusinthidwa pakapita nthawi ndi njira yomweyi ya fuse, zomwe zimapangitsa kuti pakhale zida zosiyanasiyana zosinthira zomwe zili ndi njira zosiyanasiyana, zomwe zimabweretsa mavuto ambiri kwa wogwiritsa ntchito.

Mawaya a fuse nawonso ayenera kusamalidwa kwambiri. Mwachitsanzo, malo olumikizira pakati pa fuse ya screw ayenera kulumikizidwa kumbali yamagetsi, ndipo malo olumikizira screw ayenera kulumikizidwa kumbali yonyamula katundu. Kupanda kutero, n'zosavuta kuyambitsa ngozi yamagetsi fuse ikasinthidwa.

Komabe, pakadali pano, pakupanga chilengedwe cha dziko lathu, makampani ena opanga mafakitale, nyumba zamaofesi ndi makina ena ogawa magetsi omwe amayendetsedwa ndi akatswiri odziwa zamagetsi (antchito a BA4 ndi BA5, onani Appendix C) amagwiritsa ntchito ma DC circuit breakers. Ochepa amafunika kugwiritsa ntchito ma fuse, koma m'maiko ena otukuka zachuma, kugwiritsa ntchito mitundu iwiriyi ya zida zamagetsi ndi pafupifupi theka.

Monga tonse tikudziwira, mtengo wa DC circuit breaker ndi wokwera kwambiri poyerekeza ndi mphamvu yayikulu ya mzere waukulu, pomwe fuse yokhala ndi mphamvu yocheperako ngati 30 imatha kudula mosavuta mphamvu yafupikitsa ya makilomita 50, ndipo mtengo wosintha fuse ndi wochepa kwambiri. Kuphatikiza apo, mutazimitsa DC circuit breaker, mphamvu yoletsa ma contacts imakhalabe yosasinthika mutasintha ndi ina yatsopano. Pachifukwa ichi, kungakhale kotetezeka kudula short circuit ndi fuse.

Kuphatikiza apo, pamene kusiyana kwa mulingo wamakono wa fuse iliyonse malinga ndi muyezo wazinthu (monga, mphamvu yosagwirizana yomwe yavomerezedwa Ngati ndi 1.25in, ndipo mphamvu yosakanikirana yomwe yavomerezedwa Ngati ndi 1.6in) ndi nthawi 1.6, muyezo wazinthu umatchula milingo yonse ya ma fuse. Kusankha kwake kumatha kutsimikizika ngati kugwiritsidwa ntchito ngati chitetezo cha overload, koma n'kovuta kupeza ma DC circuit breakers. Mwanjira ina, ma fuse ali ndi kusankha bwino pakati pa milingo yoteteza overload, zomwe zitha kuchepetsa kulephera kwa mphamvu panthawi yoteteza overload.