06 Oct


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Pompă submersibilă cu motor de 220V sau de 380V? Care este cea mai bună opțiune pentru mine?
Pompele de apă de uz casnic sunt esențiale pentru distribuirea eficientă a apei. Dintre cele
existente, pompa submersibilă este foarte populară și foarte eficientă,
deoarece consumă puțină energie . Are capacitatea să
împingă apa cu o presiune mult mai mare decât alte modele de pompe centrifugale, de suprafață ,etc.
Cu toate acestea, înțelegerea tipurilor
de voltaj este esențială în procesul de alegere a unei pompe submersibile potrivite pentru tine.
Curent electric monofazat 220v
Curentul electric monofazat
se folosește în mod obișnuit în domeniul casnic si foarte putin în domeniul industrial , în principal
pentru alimentarea motoarelor mici sub 2200 de wați. Acesta este un curent alternativ
cu două sau trei fire. Modelele de cabluri mai vechi dispun de o linie de
alimentare și o linie nulă. Noile modele sunt prevăzute cu împământare pentru a
îmbunătăți siguranță.
Deși curentul electric monofazat
este disponibil aproape peste tot, nu este recomandată utilizarea sa pentru
punerea în funcțiune a motoarelor mai mari de 5 CP.
Atunci când se compară
două motoare cu aceeași putere nominală, motorul care utilizează curent electric
monofazat va consuma mult mai multă energie electrică decât motorul care funcționează
pe bază de curent electric trifazat. Datorită consumului de curent mai mare,
sunt necesare bobine mai mari și, prin urmare, mai scumpe.
Pe lângă faptul că sunt
mai mari din punct de vedere fizic, motoarele care folosesc curent electric monofazat
sunt, în general, mai puțin eficiente și necesită un condensator de pornire
care mărește costul. Din acest motiv, se recomandă utilizarea motoarelor care
pot folosi curent trifazat, dacă este disponibil.
Dacă distanța de la pompa la priză este lungă pompele cu motor monofazat au nevoie de o secțiune a firelor mult mai groasă decât pompele cu motoare trifazice ceea ce înseamnă un cost mai mare a cablului electric .
Curent electric trifazat 380v
Curentul
electric trifazat este utilizat de obicei în domeniul industrial în care funcționează echipamente cu motoare mari. Acest tip de curent este adesea distribuit
printr-o configurație Wye cu cinci fire. Trei dintre fire sunt de fază ( prin
care intră curent), cel de-al patrulea fir este nulul, iar cel de-al cincilea
firul de împământare.
În plus, este și mai
puțin costisitor. Acest lucru se datorează faptului că acest tip de curent are
trei unde identice suprapuse. Ciclurile de undă sunt distanțate uniform la 120
°, astfel încât curentul furnizat rămâne relativ constant în comparație curentul monofazat.
Motoarele de peste 2,2kw sunt in proporție de 90% motoare care folosesc curentul electriv trifazat .
În comparație cu o
sursă de alimentare monofazată care utilizează cea mai comună configurație
(fază și nul), o sursă trifazată fără nul poate transmite de trei ori mai mult
curent. Din acest motiv, raportul dintre capacitatea și materialul conductor se
dublează, făcând posibilă utilizarea cablurilor mai mici și mai puțin
costisitoare.
Înțelegerea diferențelor
existente între cele două tipuri de curent electric este cea mai bună soluție
pentru alegerea pompei potrivite pentru nevoile tale.
Curentul electric poate avea un impact major asupra designului pompei și al motorului acesteia. Înțelegerea acestor principii de bază te va ajuta să înțelegi eficiența motorului, cum pornește și care sunt costurile de funcționare și întreținere.
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