Ko te nāianei tīkina mōrahi mō conductors parahi

A, no te he o nāianei hiko rere i roto i te taura, ngaro wahi o te pūngao kei te. haere ia ki conductors whakawera, no te mea o ratou ātete ki te whakaiti i faarahi te uara mana tuku i me te nāianei tīkina mo te waea parahi. Ko te manakohia tino i roto i te mahi kaiwhakahaere, ko te parahi, i he uara resistance hiko iti nui kiritaki nui e ka ko e wātea ana i roto i te whānuitanga whanui.

Ko te konganuku e whai ake nei ki te kawe ia pai ko te konumohe. Ko reira iti atu parahi, engari ko reira atu pakarukaru, me te haka i te hononga. Tuatahi i hanga i roto i-whare whatunga kāinga ki waea konumohe. i huna ratou i raro i te raima mo te wa roa ki te wareware e pā ana ki te waea. haere hiko te nuinga mo te rama, a ngāwari taea waea te tu i te kawenga.

Ki te whanaketanga o te hangarau, te ope o taputapu hiko, e kua riro mahuinga i roto i te ora ia rā, me te rapu utu atu hiko. kohi Power Kua nui haere a te kore te waea akakoromaki i reira. Na e kore e taea ki te hanga hiko fare whare ranei kahore tātai mana waea. E whiriwhiria waea me taura kia rite ki te karo i ngā utu faufaa, a kei te tino faaruru ratou ki pikaunga katoa i roto i te whare.

Take whakawera hiko

Haere i te nāianei hiko ai whakawera o te kaiwhakahaere. I pāmahana teitei, oxidized te whakarewa te tere, me te mātao timata ki te ngohe i te pāmahana o te 65 ⁰ C. Ko te atu ko reira wera, te tere haere ki raro. Hoki tenei take, kua whiriwhiria te waea mo te nāianei tīkina, e kore nei e puta ratou ki te overheat.

wāhanga waea Horahanga

kawea te āhua o te waea i roto i roto i te porohita, tapawhā, tapawhā, tapatoru ranei. I roto i te wāhanga waea noho pai porohita. Ko te parahi mauiui e te nuinga o tāuta i roto i te rūnanga mana, me te he tapawhā tapawha ranei.

kua oti te whakarite wāhi Cross-motu e i whanganga ki te caliper ora i runga i te āhuatanga taketake:

• porohita - S = πd ^2/4;
• tapawha - S = he ^2;
• tapawhā - S = he b *;
• tapatoru - πr ^2/3.

whakamahia te momotuhi whai i roto i te tātai:

• r - te pūtoro;
• d - diameter;
• b, he - whanui me te roa o te wāhanga;
• π = 3,14.

Tātaitanga o te mana i roto i te waea

whakaritea te mana tukua i roto i te uaua o te taura i roto i tona mahi e te tātai: P = ahau _n ² RN,

te wahi ahau _n - kawenga o nāianei, A; R - ātete, i roto i ohms; n - maha o conductors.

He pai te tātai, ka tātai i te kawenga. Ki te te hono te taura ki a ratou maha, tatau te rahinga o te wera te motuhake mo ia kiritaki pūngao, me ka ako, te hua.

Kei te tatau ano te nāianei tīkina mo te parahi paea waea i roto i te wāhanga ripeka. Hoki tenei whakaaro i te mutunga o te fluff, ki te ine i te diameter o tetahi o nga waea, tātai i te rohe, me te tini haere e te tokomaha i roto i te waea.

rahi Waea mō ngā āhuatanga whakahaere rerekē

kaiwhakahaere ripeka-wāhanga wa whanganga i roto i mitamano tapawha. Ki te pakeke whakatau tata i te waea parahi mm2 nāianei tīkina haere i roto i te 10 te, e kore e overheat reira.

Ko te waea taura pātata ki tetahi ki tetahi mahana, na e hiahia ana koe ki te whiriwhiri i te matotoru o te uaua i runga i te papa i te whakatikatika ki reira ranei. Ano, mehua tangohia ki te whakarunga tawhē iti me i muri i tīpakohia mai i te whānuitanga paerewa.

Ka taea e waea e mārō rawa, me te piringa. I roto i te whakatinanatanga tuatahi, kei te whakatakotoria ki runga ki te papa i waho i roto i te putorino aerodynamics taura ranei. toro moe i raro i te raima, i roto i nga awa ranei korere roto i te hanganga. Here, mahi atu pākaha tikanga, no te mea i roto i ngā wāhi herea kahore rangi taura wera.

Hoki ngā āhuatanga whakahaere rerekē e papaki whakarea, e me whakanuia e te nāianei tonu tātai i runga i te āhuatanga e whai ake nei rānei:

• monocable i roto i te roa ngongo o 10 m: ahau = ahau _n x 0,94;
• e toru taura kotahi-matua i roto i te ngongo: ahau = ahau _n x 0.9;
• whakapanga i roto i te wai ki te momo paninga tiaki KL: ahau = ahau _n x 1.3;
• wha-matua cable wāhanga rite: ahau = ahau _n x 0,93.

tauira

A, no te te kawenga he 5 Kw me te 220 V mana nāianei i roto i te waea parahi, ko te 5 × 1000/220 = 22.7 A. Ko tōna wāhanga ripeka e 22.7 / 10 = 2.27 mm ^2. Ka whakarato tēnei nui mo te nāianei whakaaetia o waea parahi o te wera. Na reira ko te reira e tika ana i konei ki te tango i te taha iti o te 15%. Ka rite ki te hua, te wāhanga ripeka, ka waiho S = 2,27 + 2,27 x 15/100 = 2.61 mm ^2. Na ki tenei te rahi e te tiki i te kaiwhakahaere paerewa ripeka-wāhanga, i te mea 3 mm.

Tohanga o te wera i roto i te mahi o te taura

e kore ai e mahana te pūnanao ake mā te haere o nāianei ake. I te wa ano e homai te reira ake te wera ki te taiao, te nui o e tei runga i te therebetween pāmahana rerekētanga. I te tahi vahi, puta he huru taurite me whakaturia te pāmahana kaiwhakahaere te taimau.

Nui! A, no te whiriwhiri tika mate waea i runga i whakawera iti te. Kia mahara te reira e i roto i te kohi mana noatia (ina overheat te waea) hoki i ki te utu. I runga i te ringa kotahi e whakatupato koe mo te kohi anō i runga i te counter me i te tahi atu - mo te whakakapinga o te taura.

Tīpakonga o waea ripeka-wāhanga

e kore tino whakaaro o te electricians fare angamaheni i runga nei ki te wāhanga waea whiriwhiri. I roto i te nuinga o te wā, te whakamahi i enei:

• Taura mata-i roto i - 6.4 mm ^2;
• turanga - 2.5 mm ^2;
• rama taketake - 1.5 mm ^2.

pakari a te pūnaha pērā ki te kawenga, ki te kahore he taputapu nui, e hiahia maha ki te kawe i te supply mana motuhake.

Nui ki te kitea i te waea parahi nāianei whaimana, te tepu i te whaiaronga. Reira whakaatu hoki tātaitanga raraunga mā te whakamahi i konumohe.

Ko te pūtake mo te kōwhiringa o waea te kiritaki te mana. Ki te te mana katoa i roto i te rārangi i te matua tāuru P = 7,4 Kw i U = 220 V, ka waiho hei nāianei tīkina mo nga waea parahi 34 i runga i te te tepu, me te wāhanga ripeka - 6 mm ² (gasket kati).

aratau whakahaere wā-poto

Ko te mōrahi o nāianei tihi tīkina mō waea parahi i roto i mahi tikanga ki te huringa ki runga ki te 10 meneti, me te mahi wā i waenganui i a ratou e kore e hoatu neke atu i te 4 meneti te ki te mahi tonu, ki te kore he te wāhanga ripeka neke atu i te 6 mm ^2. A, no te motu i runga 6 mm ^2: _DOP ahau = ahau _n ∙ 0.875 / √T _AE .

te wahi T _AE - ōwehenga o te wā roa ki te roanga o te huringa mahi.

Tahuri atu te mana i roto i te take o te kikī me poto-iahiko takoto e āhuatanga hangarau e whakamahia ana kupu taka. Kei raro ko te hoahoa o te paewhiri mana flat iti. Power i te mita tomo te whakataki aunoa DP MCB kaha o 63 A, e tiaki i te mīhini waea ki ngā rārangi mana takitahi 10 A, 16 A me 20 A.

Nui! Me kia iti iho i te i te mōrahi waea nāianei tīkina me teitei kawenga o nāianei mihini matotoru hoki. I roto i tenei take, ka kia tiakina ia raina.

Me pēhea te ki te whiriwhiri i te mata ki te fare?

Ko te uara o te nāianei te tauanga i runga i te urunga taura ki te fare, tei runga i te tini o ngā kaiwhakamahi e hono. E whakaatu ana te ripanga i te whakaaro e tika ana, me to ratou kaha.

pūrere hiko	mana Whakatauria, Kw
TV	0.18
kōhua	2-6
mātao	0.2-0.3
oumu	2-5
kaihoroi mārua	0,65-1
hopane hiko	1,2-2
rino	1.7-2.3
ngaruiti	0,8-2
rorohiko	0,3-1
mīhini horoi	2.5-3.5
pūnaha rama	0.5
anake	12,03-23,78

Ko te kaha o nāianei e taea te kitea o te kaha pai-mohiotia i te faaiteraa:

Ahau = P ∙ K _me / (U ∙ cos φ), i reira K = _{0.75, me} - te tauwehe simultaneity.

Hoki te nuinga o taputapu hiko e te hunga kaha cos mana kawenga tauwehe φ = 1. I roto i te rama kōrekoreko, kaihoroi mārua hiko, mīhini horoi, etc, ka ko reira iti iho i te 1, me tangohia te reira ki pūkete.

Whakaaetia nāianei tonu mo te whakaaro e whakaaturia ana i roto i te tepu, ka waiho ahau = 41 - 81 A. Ko te tino mīharo te uara whiwhi. kia whakaaro tonu koe e pā ana ki reira, ka ki te hoko i te pūrere hou, ahakoa tona kume fare mekameka. Mai i te tepu mo te tuwhera waea tāuru wāhanga waea ka kia 4-10 mm ^2. He tonu kia whakaaro rite fare kawenga e pā te whare noa. Ko reira taea e kore e te tari whare tukua ki hono maha taputapu ki te tomokanga o te riser wahi i roto i cabinets tohatoha i raro i ia wāhanga me whitinga pahi kūpapa (parahi konumohe ranei). Ratou e kore noa e hutia te mita hiko, e te nuinga o te wā tāuta i roto i te whakangungu rakau i runga i te taunga. I tua atu, i te utu mo te utu overruns ka tupu paerewa hiko ki te rahi faahiahia e tika ana ki te whakanui ake i tau whakarea.

Ki te mahi te waea mo te whare tūmataiti, i reira he hiahia ki te tango i ki pūkete te kaha o te waea rere atu i te whatunga matua. e kore e Tikanga whakamahia SIP-4-wāhanga 12 mm konumohe waea ² Kia rawaka mō te kawenga taimaha.

kōwhiringa waea mō ngā rōpū takitahi o kiritaki

Kia tīpakohia taura ki te hono ki te whatunga, ka tangohia ake e te tiaki ki overloads me poto-iahiko urunga aunoa mo reira, me te whiriwhiri koe i te waea mo ia rōpū kiritaki.

Kei te wehea te kawenga ki te rama, me te mana. Ko te kaiwhakamahi tino kaha i roto i te whare ko te kīhini, te wahi te tāutatia ngangau te hiko, mīhini horoi me te taoratu, pouaka, ngaruiti me ētahi atu pūrere.

Hoki ia waea putanga tīpakohia 2.5 mm ^{2 o.} Mai i te tepu, ko te reira ma'iri Nini iahiko supply 21 A. te tikanga toropā - i te pouaka huinga. Na reira, kia pai te pouaka te waea 4 mm ^2. Ki te hono nga turanga ki te taura flat, kia whanau ai i roto i te ngakau e hāngai te wāhanga ripeka o 2.5 mm ² ki te kaha o 4.6 Kw. Na reira, i te kawenga ki runga ki a ratou e kore e nui te reira. He he kotahi ngoikoretanga: i roto i te take o te kore o tetahi putanga, kia hoki kia pehi te toenga.

I te kōhua, ngangau hiko, rangi-conditioning me ētahi atu kawenga tiketike he mea tika ki te hono i te waea motuhake ki te pū. hoki ko te kaukau i te urunga motuhake ki te pū, me te RCD.

I roto i te rama kawea i roto i runga i 1.5 mm ^2. Na he tokomaha whakamahi i te rohe taketake, me te atu e kia rapua e te wāhanga ripeka nui.

Me pēhea te ki te tātai i te waea e toru-wāhanga?

Ko te tātai tīkina o rahi taura pānga te momo o te whatunga. Ki te te kohi mana taua, ka waiho iti atu i mo te-wāhanga kotahi kawenga o nga conductors taura mō te whatunga toru-wāhanga o nāianei.

Hoki e toru-matua taura te mana ki U = 380 tātai whakamahia te:

Ahau = P / (√3 ∙ U ∙ cos φ).

Ka taea te kitea te take mana i roto i te āhuatanga hiko, he reira 1, ki te te kawenga hohe ranei. tohua te nāianei mōrahi tīkina mō waea parahi, me te konumohe mō te toru-wāhanga ngaohiko e i roto i te papa.

mutunga

Kia kore ai pukā i roto i conductors auroa kawenga kia tika tātai wāhanga hake ripeka, i runga i nei te nāianei tīkina mō waea parahi. Ki te kore te mea nui te mana te kaiwhakahaere, te taura ka materoto kore.