Ngā āhuatanga o ngā fiusi

Ngā āhuatanga matua o te fiusi

1) I muri i te pakaru o te hapa, me whakakapi te fiusi.

2) Kotahi te mahi tiaki, kotahi anake te āhuatanga wā whakamuri o te aukume nui, e whakamahia ana mō te taumaha rawa, te ara iahiko poto me te tiaki i te hapa whenua.

3) Ina puta he fiusi kotahi-wāhanga, ka puta he hua kino o te mahi rua-wāhanga ki te motuka toru-wāhanga. Ko te tikanga, ka taea te whakamahi i te fiusi me te tohu whakaoho hei whakakapi, ā, ka taea e te fiusi kotahi-wāhanga te momotu i te toru-wāhanga.

4) Kāore e taea te whakamahi i te mana mamao, me hono atu ki te pana maripi hiko me te pana.

Ngā Āhuatanga o te Fiusi

Ka kitea te mahi a te fiusi mā te rewa o te rewa. He āhuatanga tino kitea tō te fiusi, arā, ko te āhuatanga ampere-hēkona. Mō te rewa, ko ōna āhuatanga iahiko mahi me te wā mahi ko ngā āhuatanga ampere-hēkona o te fiusi, e kiia ana hoki ko ngā āhuatanga whakaroa wā whakamuri, arā: ina iti te iahiko taumaha, ka roa te wā honohono; ina nui te iahiko taumaha, ka poto te wā honohono.

Hei mārama ki ngā āhuatanga o te ampere-hekona, ka taea e tātou te kite mai i te ture a Joule, i roto i te ara iahiko raupapa, ko te uara R o te fiusi kāore i te tino rerekē, ā, ko te uara wera he rite ki te tapawhā o te iahiko I, ā, he rite ki te wā whakamahana T, arā: ina nui ake te iahiko, he poto ake te wā e hiahiatia ana kia pupuhi te rewa. Ina iti te iahiko, he roa ake te wā e hiahiatia ana kia pupuhi te rewa, ā, ahakoa he iti iho te tere o te kohikohi wera i te tere o te horapa wera, e kore te pāmahana o te fiusi e piki ki te ira rewa, ā, e kore te fiusi e pupuhi. Nō reira, i roto i tētahi awhe iahiko taumaha, ina hoki te iahiko ki te noa, e kore te fiusi e pupuhi, ā, ka taea tonu te whakamahi.

Nō reira, he iti rawa te ia o te rewa. E ai ki ngā pāmahana rerekē, he rerekē anō hoki te iti rawa o te ia o te rewa. Ahakoa e pāngia ana te ia e te taiao o waho, ka taea te wareware i roto i ngā mahi. I te nuinga o te wā, ko te ōwehenga o te iti rawa o te ia o te rewa ki te ia kua whakatauria o te rewa te tauwehenga rewa iti rawa. Ko te tauwehenga rewa o te rewa e whakamahia whānuitia ana he nui ake i te 1.25, arā, ko te rewa me te ia kua whakatauria o te 10 amps e kore e hanumi ina kei raro iho te ia i te 12.5 amps.

Ka kitea i tēnei he tino pai te mahi tiaki ara-poto o te fiusi, ā, he toharite te mahi tiaki taumaha. Mena he mea tika kia whakamahia hei tiaki taumaha, me āta whakataurite te iahiko taumaha raina ki te iahiko whakatauranga o te fiusi. Hei tauira: ka whakamahia te rewa 8-amp i roto i te ara-poto 10-amp hei tiaki ara-poto me te tiaki taumaha, engari kāore i te tino pai ngā āhuatanga tiaki taumaha i tēnei wā.