Available Fault Current: What is it? (And How To Calculate It) Mafi yawan karamin kofin da ya shafi (Kuma Hukuma Don Jin Hausa)
Misalai mai fadada kungiyar da suka shafi
Misalai mai fadada kungiya (AFC) yana nufin misali mai gaba-gaba na kungiyar da ke zama a wajen fadada. Wannan ita ce misali mai gaba-gaba da za a iya bayarwa zuwa abubuwan tattalin arziki a kan fadada. Misalai mai fadada kungiya yana da sunan wasu waɗanda suke cewa misalai mai fadada kungiya ta hanyar tsirriyar kungiya.
Kalmomin 'Misalai Mai Fadada Kungiya' an fito a 2011 a tushen NFPA 70: National Electric Code (NEC) a kofin 110.24 (babban vershin ta tushen).
Daga baya, ya danganta a lura misalai mai gaba-gaba na kungiya da ranar da aka yi ra'ayi a kan misalai mai fadada kungiya.
Suna mai fadada kungiya ba suna mai sarrafa abubuwa. Amma ita ce misalai mai gaba-gaba na kungiya da za su iya haifar da abubuwan tattalin arziki a kan fadada.
Sunan short-circuit current rating (SCCR) yana dace da misalai mai fadada kungiya. Duk abubuwan tattalin arziki ko kungiyoyi ba su zai iya da SCCR da ya fi yawa da AFC.
Dalilin da aka lura AFC a abubuwan tattalin arziki shine hakan ya taimaka masu aiki a zuwa sunan da za su iya amfani da shi don tabbatar da duk kofin NEC 110.9 da 110.10.
Tsarin Misalai Mai Fadada Kungiya
Daga baya, a NEC 110.24, ya danganta a lura misalai mai fadada kungiya. Amma a matsayin da aka yi ra'ayi a kan misalai mai fadada kungiya na abubuwan tattalin arziki, muna bukata sunan misalai mai fadada kungiya a terminali na biyu na tsohon transformer na gwamnati da take bayyana wannan abubuwan tattalin arziki.
A wani yau da digi, sunan misalai mai fadada kungiya ana bayyana a kan tsohon transformer na gwamnati.
Daga baya, misalai mai fadada kungiya ana ra'ayi a kan abubuwan tattalin arziki. Ra'ayin abubuwan tattalin arziki yana dace saboda tsirriyar kungiya.
Yara da kake so a kan ra'ayin misalai mai fadada kungiya;
Nemi tsari na kungiya (
)Nemi karamin tsirriyar kungiya (C) daga jerin
Nemi girman kungiyar da ke samun arziki (L)
Daga baya, amfani da adadin da aka samu, za a ra'ayi misalai (M) a kan tsarin:
![\[ F = \frac{1.73 \times L \times I}{C \times E_{L-L}} \]](https://www.electrical4u.com/wp-content/ql-cache/quicklatex.com-29b4ca63e95eac3bb3812b9fa899bbd0_l3.png?ezimgfmt=rs:137x40/rscb38/ng:webp/ngcb38 "Rendered by QuickLaTeX.com")
![\[Multiplier\ (M) = \frac{1}{1+F} \]](https://www.electrical4u.com/wp-content/ql-cache/quicklatex.com-204702eb1d48a38fc42bd9af4542b522_l3.png?ezimgfmt=rs:194x38/rscb38/ng:webp/ngcb38 "Rendered by QuickLaTeX.com")
Don neman misalai mai fadada kungiya a wurin, ya kashe misalai (M) da sunan misalai mai fadada kungiya a terminali na biyu na tsohon transformer na gwamnati.
Yadda Ake Ra'ayi Misalai Mai Fadada Kungiya
Ba ni misali a kan yadda ake ra'ayi misalai mai fadada kungiya.
A nan ne a yi rayuwa a kan kungiyar da take da tsari na kungiya 480V. Karamin tsirriyar kungiya C a nan ne 13900.
Misalai mai fadada kungiya a terminali na biyu na tsohon transformer na gwamnati ne 35000A, kuma girman kungiyar da ke samun arziki ne 100ft.
EL-L = 480V
C = 13,900
I = 35,000A
L = 100ft
Daga baya, saka waɗannan adadin a kan tsarin da aka bayyana a fagen.
