Ana iya ganin allunan da'ira na PCB a ko'ina a cikin na'urori da kayan aiki daban-daban. Amincewar hukumar kewayawa shine muhimmin garanti don tabbatar da aiki na yau da kullun na ayyuka daban-daban. Koyaya, akan allon da'ira da yawa, sau da yawa muna ganin yawancin su manyan wuraren jan ƙarfe ne, suna zayyana allon kewayawa. Ana amfani da manyan wuraren jan karfe.

Gabaɗaya magana, babban yanki na jan ƙarfe yana da ayyuka biyu. Daya shine don zubar da zafi. Domin na'urar da'irar tana da girma da yawa, ƙarfin yana tashi. Sabili da haka, ban da ƙara abubuwan da ake buƙata na zubar da zafi, irin su ƙwanƙwasa zafi, magoya bayan zafi, da dai sauransu, amma ga wasu allunan da'ira, Bai isa ya dogara da waɗannan ba. Idan kawai don zubar da zafi ne, ya zama dole don ƙara yawan abin da ake sayar da shi yayin da ake ƙara yanki na tagulla, da kuma ƙara tin don haɓaka zafi.

Ya kamata a lura da cewa saboda babban yanki na jan karfe, PCB ko tagulla mannewa za a rage saboda dogon lokacin da igiyar igiyar igiyar ruwa ko dumama PCB na dogon lokaci, kuma iskar gas da aka tara a cikinta ba za a iya ƙarewa ba. lokaci. Rufin tagulla yana faɗaɗa kuma ya faɗi, don haka idan wurin jan ƙarfe yana da girma sosai, yakamata ku yi la'akari da ko akwai irin wannan matsala, musamman idan yanayin zafi ya yi girma, zaku iya buɗe shi ko tsara shi azaman grid mesh.

Sauran shine don haɓaka ƙarfin hana tsangwama na kewaye. Saboda da babban yanki na jan karfe iya rage impedance na ƙasa waya da kuma garkuwa da siginar don rage tsangwama tsakanin juna, musamman ga wasu high-gudun PCB allon, ban da thickening ƙasa da waya kamar yadda zai yiwu, da kewaye jirgin wajibi ne. . Ƙarƙasa duk wuraren kyauta, wato, "cikakken ƙasa", wanda zai iya rage tasirin inductance na parasitic yadda ya kamata, kuma a lokaci guda, babban yanki na ƙasa zai iya rage tasirin amo. Misali, don wasu da'irori na guntun taɓawa, kowane maɓalli yana rufe da waya ta ƙasa, wanda ke rage ikon hana tsangwama.