Khetha ucingo ngokwexabiso elivumelekileyo lomthamo wangoku wokuthwala ucingo

I-wire cross section ye-wiring yangaphakathi kufuneka ikhethwe ngokuhambelana nomthamo ovumelekileyo wangoku wokuthwala ucingo, ixabiso lelahleko lombane elivumelekileyo lomgca, kunye namandla omatshini wocingo.Ngokuqhelekileyo, indawo yokuthwala ucingo ikhethwe ngokuhambelana nomthamo ovumelekileyo wangoku, kwaye emva koko ukuqinisekiswa kuqhutyelwa ngokweminye imiqathango.Ukuba icandelo lomnqamlezo alihambelani neemfuno zemeko ethile yokulinganisa, umqhubi kufuneka akhethwe ngokwecandelo elincinci elivumelekileyo elingenako ukuhlangabezana nomqathango.

I-Ampacity evumelekileyo yocingo: I-ampacity evumelekileyo yocingo ikwabizwa ngokuba yi-ampacity ekhuselekileyo okanye ixabiso langoku elikhuselekileyo locingo.Ubushushu obuphezulu obuvumelekileyo bokusebenza kocingo jikelele ngama-65°C.Ukuba iqondo lobushushu lidlula eli qondo lobushushu, i-insulation layer yocingo iya kuguga ngokukhawuleza, yonakale kwaye yonakaliswe, kwaye inokubangela nomlilo.Okubizwa ngokuba ngumthamo ovumelekileyo wangoku wokuthwala ucingo yixabiso eliphezulu langoku elinokugqithiswa ixesha elide xa ubushushu bokusebenza bungagqithi kwi-65 °C.

Ekubeni ubushushu bokusebenza kocingo aluhambelani kuphela nokudlula kwangoku kwi-wire, kodwa kwakhona kuhambelana nemeko yokutshatyalaliswa kobushushu bocingo kunye nobushushu be-ambient, umthamo ovumelekileyo okhoyo wokuthwala ucingo awukho ixabiso elimiselweyo.Xa ucingo olufanayo luthatha iindlela ezahlukeneyo zokubeka (iindlela zokubeka ezahlukeneyo, iimeko zokutshatyalaliswa kobushushu zihluke kwakhona) okanye kumaqondo okushisa ahlukeneyo, umthamo wayo ovumelekileyo wokuthwala ngoku uhlukile.Jonga kwincwadana yombane yobugcisa bombane obuvumelekileyo bokuthwala umthamo weingcingo ngeendlela ezahlukeneyo zokubeka.

Ixesha langoku lomthwalo womgca lingabalwa ngolu hlobo lulandelayo:

Isigaba esinye sesekethe yoxhaso olusulungekileyo: I=P/U

Isekethe yenqanaba elinye kunye ne-inductance: I=P/Ucosφ

Isigaba sesithathu sesekethe ecocekileyo yokumelana: I=P/√3UL

Isigaba sesithathu sesekethe ene-inductance: I=P/√3ULcosφ

Iintsingiselo zeeparamitha kule fomula ingasentla zezi:

P: ngamandla omthwalo, kwiiwatts (W);

I-UL: yi-voltage ye-voltage yesigaba sesithathu sombane, kwi-volts (V);

cosφ: ngumba wamandla.

Xa ukhetha ngokuhambelana nomthamo ovumelekileyo okhoyo wentambo, umgaqo oqhelekileyo kukuba umthamo okhoyo ovumelekileyo okhoyo awukho ngaphantsi kombane obaliweyo we-composite yomgca.