Khetha intambo ngokwevelu elivumelekile lomthamo wamanje wokuthwala wentambo

Ingxenye yezintambo eziphambanayo zezintambo zasendlini kufanele zikhethwe ngokuya ngomthamo ovunyelwe wokuphatha wamanje wentambo, inani elivumelekile lokulahlekelwa kagesi lomugqa, namandla omshini wentambo.Ngokuvamile, indawo yokuthwala ucingo ikhethwa ngokuvumelana nomthamo ovumelekile wokuthwala wamanje, bese ukuqinisekiswa kwenziwa ngokuvumelana nezinye izimo.Uma ingxenye yesiphambano ingahlangabezani nezidingo zesimo esithile sokulinganiswa, umqhubi kufanele akhethwe ngokuvumelana nenani elincane elivunyelwe lesiphambano elingakwazi ukuhlangabezana nombandela.

I-Ampacity evumelekile yocingo: I-ampacity evumelekile yocingo ibizwa nangokuthi i-ampacity ephephile noma inani lamanje eliphephile lentambo.Izinga lokushisa eliphezulu elivumelekile lokusebenza lentambo evamile ngu-65°C.Uma izinga lokushisa lidlula leli zinga lokushisa, ungqimba lokufakelwa kocingo luzoguga ngokushesha, lonakale futhi lonakaliswe, futhi lungabangela nomlilo.Okubizwa ngokuthi amandla okuthwala amanje avumelekile ocingo yinani eliphezulu lamanje elingadluliswa isikhathi eside lapho izinga lokushisa lokusebenza lingeqi ku-65 °C.

Njengoba izinga lokushisa lokusebenza kocingo alihlobene kuphela nokudlula kwamanje ocingweni, kodwa futhi lihlobene nesimo sokushabalalisa ukushisa kocingo kanye nezinga lokushisa elizungezile, umthamo wamanje ovumelekile wokuthwala ucingo awulona inani elinqunyiwe.Lapho ucingo olufanayo lusebenzisa izindlela zokubeka ezihlukene (izindlela zokubeka ezihlukene, izimo zalo zokukhipha ukushisa nazo zihlukile) noma emazingeni okushisa ahlukene, umthamo wawo wamanje ovumelekile wokuthwala nawo uhlukile.Bheka imanuwali yobuchwepheshe kagesi ngomthamo ovumelekile wokuthwala okwamanje wezintambo ezinezindlela ezahlukene zokubeka.

Umthamo wamanje wokulayisha umugqa ungabalwa ngefomula elandelayo:

Isekhethi yokumelana nesigaba esisodwa: I=P/U

Isekhethi yesigaba esisodwa ene-inductance: I=P/Ucosφ

Isekhethi yokumelana nezigaba ezintathu: I=P/√3UL

Isekhethi yezigaba ezintathu ene-inductance: I=P/√3ULcosφ

Izincazelo zamapharamitha kumafomula angenhla yilezi:

P: amandla omthwalo, ngama-watts (W);

I-UL: i-voltage yezigaba ezintathu zamandla kagesi, ngama-volts (V);

I-cosφ: isici samandla.

Uma ukhetha ngokuya ngomthamo ovunyelwe wokuphatha wamanje wentambo, isimiso esijwayelekile siwukuthi umthamo wamanje ovunyelwe wokuthwala awukho ngaphansi kowamanje obaliwe wenhlanganisela yomugqa.