Umnyombo wekhebula lamandla ikakhulukazi wakhiwe ama-conductor amaningi, ahlukaniswe abe yi-single core, i-double core kanye ne-3 core.

Izintambo eziwumgogodla owodwa zisetshenziswa kakhulu kumasekethe esigaba esisodwa se-AC ne-DC, kuyilapho izintambo eziwumgogodla ezintathu zisetshenziswa kakhulu ku-AC yezigaba ezintathu.

izifunda.Kuzintambo eziwumgogodla owodwa, ubudlelwano phakathi kobubanzi bomnyombo kanye nedayamitha yangaphandle yekhebula kulula.Ngokuvamile,

i-diameter ye-wire core cishe i-20% kuya ku-30% ye-diameter yangaphandle yekhebula.Ngakho-ke, singalinganisa ububanzi obuyisisekelo ngokulinganisa

ububanzi obungaphandle bekhebula.

Ezintambo ezintathu eziyinhloko, njengoba i-current phase tatu izokhiqiza insimu kazibuthe kuma-conductor, ithonya lesikhala.

phakathi kwama-conductor kanye ne-insulation layer idinga ukucatshangelwa.Ngakho-ke, lapho ubala ububanzi obungaphandle bekhebula,

izici ezifana ne-conductor cross-sectional area, isikhala phakathi kwamakhondakta kanye nogqinsi lwesidingo sesendlalelo sokufakwa

okumele kucatshangelwe.Ngakho kanjani ukubala ububanzi obungaphandle bekhebula?Ake sibheke ngezansi.

▌01 Indlela yobubanzi bekhebula yangaphandle

Izinto ezilandelayo zidinga ukucatshangelwa lapho kubalwa ububanzi bangaphandle bekhebula:

1. I-diameter yangaphandle ye-conductor: ububanzi bomqhubi ngaphakathi kwekhebula;

2. Ukushuba kongqimba be-insulation: ukujiya kongqimba lwangaphakathi lokufakwa kwekhebula;

3. Ukuqina komgodla: ukujiya komgodla wangaphandle wekhebula;

4. Inombolo yezintambo zekhebula: inombolo yezintambo zekhebula ngaphakathi kwekhebula.

Ngokucabangela izici ezingenhla, ifomula elandelayo ingasetshenziswa ukubala ububanzi bangaphandle bekhebula:

Ububanzi bangaphandle = umqhubi we-diameter yangaphandle + 2 × ukujiya kongqimba lwe-insulation + 2 × ukujiya komgodla

Phakathi kwazo, ububanzi obungaphandle bomqhubi bungatholakala ngokubonisana nebhukwana noma ukulinganisa ngokusho kwe-

imininingwane ye-conductor;ukushuba kwesendlalelo se-insulation kanye nobukhulu be-sheath kungatholakala ngokubonisana

imininingwane yekhebula noma yokulinganisa.

Kufanele kuqashelwe ukuthi ifomula engenhla isebenza kumakhebuli anomgogodla owodwa.Uma kuyikhebula le-multi-core, idinga ukubalwa ngokuvumelana

kufomula elandelayo:

Ububanzi bangaphandle = (ububanzi bangaphandle bomqhubi + 2 × ukushuba kongqimba bokufakelwa + 2 × ukushuba komgodla) × inombolo yezintambo zekhebula + 10%

Lapho ubala ububanzi obungaphandle bekhebula lezintambo eziningi, ukubekezelela okungu-10% kudinga ukungezwa kumphumela.

▌02 Izinyathelo zokuphepha ezihlobene

1. Ngaphambi kokubala, kufanele uqinisekise ngokucophelela ukucaciswa kwekhebula, indawo enqamula izingxenye zekhondatha kanye nolunye ulwazi ukuze

qinisekisa ukunemba kwesibalo;

2. Lapho ubala, kuyadingeka ukucabangela indawo yokusetshenziswa kwekhebula, njengendawo engaphansi komhlaba, ngaphezu komhlaba, ngaphezulu.

kanye nezinye izindawo, ngoba izindawo ezihlukene zokusetshenziswa zidinga izinto ezihlukene ze-sheath okufanele zikhethwe;

3. Lapho ubala, kudingeka futhi ucabangele indlela yokufaka ikhebula, njengengaguquki noma enyakazayo, ezothinta intambo.

usayizi namandla aqinile wekhebula;

4. Naka ukubekezelelana lapho ubala ububanzi bangaphandle bekhebula, futhi unqume ukuthi ukubekezelelana okuthile kuyadingeka.

kwengezwe kumphumela wokubala ngokusekelwe esimweni sangempela.

Ngamafuphi, ukubalwa kobubanzi obungaphandle bekhebula kudinga ukucatshangelwa okubanzi kwezinto eziningi.Uma ungenjalo

uqinisekile mayelana nendlela yokubala noma amapharamitha, kufanele uxhumane nochwepheshe noma uxhumane nolwazi olufanele.