Electrical Network Quiz
Electrical Network Quiz
Put your knowledge of electrical networks to the test with this engaging quiz! Whether you're a student, a teacher, or someone simply interested in electrical engineering, this quiz challenges your understanding of key concepts and terminology.
Topics covered include:
- Neutral treatment in electrical networks
- Power loss due to Joule effect
- Transformer winding connections
- Voltage drop calculations
Tratarea neutrului in retelele electrice prin resistor are avantajul ca
A) se asiguta o selectivitate mai buna a liniei cu defect
se asigura valori simetrice ale tensiunilor pe cele 3 faze
Consumatorii pot fi in continuare alimentati in caz de defect
Pierderile de putere activa in liniile electrice, datorate efectului Joule, fac parte din categoria:
Pierderilor comerciale
Pierderilor tehnice
consumului propriu tehnologic
In etapa ascendent din metoda “ ascendent – descendent” se calculeaza:
circulatia de puteri pe laturi
Atat tensiunile cat si circulatia de putere pe laturi
Tensiunile
Conexiunea infasurarilor transformatoarelor pe partea de joasa tensiune :
este de tip triunghi
Se creeaza prin dispozitive speciale
este de tip stea
Pentru o linie electrica avand impedanta Z = R + jX pein care circula curentul inductiv I = Ia – jIn expresia caderii de tensiune fazoriala este :
ΔV = Xia – jRIr
ΔV = Ria + jXIr
ΔV = Ria – jXIr + j(Xia – jRIr)
Neutrul retelelor electrice de inalta tensiune
Se leaga direct la pamant
Se traseaza prin bobina de stingere
Functioneaza izolat
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