Ka rite ki te wāhanga waea hono i waenganui i te putanga me te

Tangata nei mahi e hono ki te mahi hiko, noa me mohio pehea ki te mahi i te tātaitanga o te taura ripeka-wāhanga o te kaha. Te kore tenei kia tūtaki koe i te āhuatanga kino ka tata puritia atu ki te aho kiritaki ko roto o te tikanga e tika ana ki te kino waiariki ki te kaiwhakahaere. Hei karo i tēnei, e kore e tika mahara tonu koutou kei te honohono te rahi waea me te mana, engari ano hoki ki te mahi tātai ki te tika. Ko te kaha ki te whiriwhiri i te diameter hiahiatia o conductors, i runga i te kei kohi mana e taea e whai hua i roto i te ora ia rā: hei tauira, ki te whiriwhiri i ratou ake taura-eke kōhua hiko.

rahi Waea, te mana me te nāianei whakaaetia

Mai te nuinga o tātai hiko e tino matatini, whakauaua rongo o te hiahia ki te mahi i tetahi tātai maha iwi, whakatau e kore e tahuri te reira ki matau, kahore te awhina o Engineers mana i roto i tenei mara. I roto i te meka, te rahi waea me te mana e pā ana ki o tātai ohie te tokorua. Ko te raruraru te whakaiti ki te whakatau i te mōrahi o nāianei, me te kōwhiringa kaiwhakahaere atu mā raraunga tohutoro tūmatanui.

ariā

Mai i te kura Course Physics te mohiotia ai e ki he e haere nāianei i roto i te rauemi conductive meinga tona whakawera, i tei runga i te rohe motu, me te whirihoranga kaiwhakahaere (ko reira kitea ai te whenu conductive kikokore o makawe te tahu ki runga ake i te pereti konganuku). Ko te uara o te nāianei nāianei hoki kua he pānga, i.e. ake i riro ona tukanga whakawera atu kaha. Kia mahara tatou te tātai o nāianei mō te tātai i te ngaohiko mōhiotia me resistance. Kei te ahu te reira i i te ture matarohia o Ohm o me titiro rite ahau = U / R, i reira U - Volts, R - ātete i roto i ohms.

Heoi, e pā ana e rua ki tenei wāhanga o te waea, me te kaha? Tonu! Ētahi atu tika i roto i tenei take e kore e whakamahi i te ariā o te kaha, me te mana (ka e whakaaturia ratou hononga i raro nei, he hakari he tātai).

mana Electric tuati-kiritaki ki te nui o tēnei wā e rerengia ana i roto i te pēne. I roto i te whānui, e taea te whakaritea i te reira i te P tātai = ahau U, te wahi ahau - te nāianei i roto i amperes. E kore matou e tangohia ki pūkete nga āhuatanga o te mana (wāhanga kaha urupare ranei), engari te raraunga aroaro he rawaka hoki te kōwhiringa o te wāhanga waea. tonu te reira i te atamira whakamutunga - ki te whakatau i te wāhi ripeka-motu o te matua taura. electricians mātanga whakatau tenei tawhā "i te kanohi", engari tūtohu tatou te whakamahi i te tātai ohie e ka ārai i hapa taea.

mahi

Ki te takoto te tikanga kia nekehia atu te kaiwhakahaere mātao taura, e tuu i te whakarewa me te diameter whanganga. Next, te uara whiwhi ki te whakakapia ki te tātai S = (3,14 * (d * d)) / 4, te wahi d - diameter i roto i mitamano.

tonu te reira ki te tango i te aratohu (Pue), kitea te tepu, me te wāhanga o nāianei e hāngai ana, me te tīpako i te taura tika. e hoki ki te pūkete te rauemi me te tikanga o whakapanga te raina.

tauira Life

Akuanei pea e hiahia ana koe ki te hono kōhua 2 Kw ki 220 V. Mā te tātai i runga hoki «P», whiwhi tatou te nāianei, ka waiho i te reira 9 Amps. Ko te taonga, ko te na'ina'i taura e rua-matua ki conductors parahi ki te wāhanga ripeka kanohi 0.75 me 1 mm.kv. Whakatūwhera te whaiaronga, kitea te "waea tuwhera". E rua-waea ripeka-wāhanga 1 mm.kv. Ka taea e te tu te reira i 16 Amps (GOST-80!), me mo te 0.75 hāngai ki te 15 A. Tata rāhui e rua-wā. Ko te kupu, i roto i tenei tauira, te whakamahi o ngā taura ki conductors parahi tohu tino manakohia. ngā hono e rahi waea me te mana.