3
Tensiunile nominale de linie EMBED Equation.3
Schema si grupa de conexiuni EMBED Equation.3
Tensiunea de scurtcircuit EMBED Equation.3
Pierderile la mers in gol EMBED Equation.3
Pierderile in infasurari EMBED Equation.3
Curentul la functionarea in gol EMBED Equation.3
Infasurarile sunt realizate din aluminiu
2. Tratarea
2.1 Inalta - conexiune Y
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Joasa - conexiune Y
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3 - puterea nominala pe faza, trasferata de reteaua primara in circuitul secundar
2.2 - Diametrul coloanei
EMBED Equation.3 = EMBED Equation.3 EMBED Equation.3
Alegem diametrul coloanei EMBED Equation.3
- Aria coloanei
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Inaltimea coloanei
Pentru Sn=63kVA iau:
EMBED Equation.3
Inaltimea bobinei
EMBED Equation.3
2.3 Numarul de spire
EMBED Equation.3 EMBED Equation.3 EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
wi=1710+10%=1795.5 iau wi=1800spire
Sectiunile conductoarelor
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Proiectarea bobinajelor
Bobinajul pe joasa tensiune
Iau conductor de EMBED Equation.3 cu izolatie EMBED Equation.3
Aranjarea spirelor pe inaltimea EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Solutie adoptata-iau 2 straturi complete a 35 spire.
35spire EMBED Equation.3 10mm=350mm, cu joc iau 360mm
EMBED Equation. 3 , cu joc iau aj=15mm
Bobinajul de inalta tensiune
EMBED Equation.3
Aranjarea spirelor pe inaltimea EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
Dispunerea bobinelor
2.7 Determinarea preliminara a reactantei inductive de scapari
EMBED Equation.3 EMBED Equation.3
EMBED Equation.3
2.7.1 Determinarea caderii de tensiune reactiva
EMBED Equation.3
2.7.2 Determinarea caderii de tensiune activa si reactiva in %
EMBED Equation.3
EMBED Equation.3
Verificare:
EMBED Equation.3 %
uk impus este de 4%, eroarea este de +2%, sub EMBED Equation.3 10% admis de STAS.
2.8 Corectarea - nu este cazul.
2.9 Calculul rezistentelor infasurarilor si a pierderilor in infasurari
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
EMBED Equation.3
In datele de proiectare am Pk=1350W si eu am obtinut Pt=1245.86W, adica -7.7%, sub EMBED Equation.3 10% admis de STAS.
2.l0 Construirea triunghiului de scurtcircuit
EMBED Equation.3
EMBED Equation.3
2.11Calculul pierderilor in fier
2.11.1 Greutatea coloanelor
EMBED Equation.3
EMBED Equation.3
2.11.2 Pierderi in coloane
EMBED Equation.3
2.11.3 Greutatea jugurilor
aii=30mm
x=aj+ai+aij
EMBED Equation.
