Zamaniyar Gaba-gaba

Idan karamin kashi na iya lura da ake kira ko kuma yadda ake kira don in hukuma mafi girma, idan wani takam da ake kiran generator, transformer mai karfi, ko kuma grounding transformer ta zama a kan duka da wasu resistance da reactance masu shi. Don wani baka ko duk system, za a kira da ake kiran mafi girma a cikin waɗannan adadin: idan positive - sequence impedance na system ya karkashin da zero - sequence resistance, da kuma positive - sequence reactance ya karkashin da ukuwa da zero - sequence reactance.

Amsa a system da take da sauran a, b, da c, kamar yadda aka bayyana a cikin rubutun. Idan akwai abin daɗi a kan ground a kan a, zai iya ƙara wannan phase zuwa sifili. Amma, an yi aiki a kan sauran biyu, b da c, zai iya ƙarfin da suka fiye, kamar yadda aka bayyana a cikin rubutun. Idan ana iya abin daɗi wanda, babbar da ake ƙara shine charging current, tushen karfi ne kuma ya ba fault point da fault current.

A cikin system da ake kiran mafi girma, muhimmanci shine fault current ya ba ground yana da kyau, ba zai iya ƙara 80% daga three - phase fault current. Wannan batu ne na iya amfani da shi don in tabbatar da cewa fault current yana da kyau, don haka za a duba system da ake kiran mafi girma da kuma tafakawa masu shi.