Sistemas Trifásicos - Formulário

Técnico Instalações Eléctricas Filipe Rocha

ω=2⋅πT

ϖ=2⋅π⋅f

T=1f

u1=√2⋅U1⋅sen (ω⋅t )

u2=√2⋅U2⋅sen(ω⋅t−2⋅π3 )u3=√2⋅U3⋅sen(ω⋅t−4⋅π3 )U⃗12=U⃗ 1−U⃗ 2

U⃗23=U⃗ 2−U⃗3U⃗31=U⃗ 3−U⃗ 1

UC=√3⋅US

I⃗ N= I⃗ 1+ I⃗ 2+ I⃗ 3

IL=√3⋅IZ

I 12= I⃗ 1− I⃗ 2I 23=I 2−I 3I⃗ 31= I⃗ 3− I⃗ 1

IZ=U S

Z

IZ=UCZ

1cv=735W

senϕ=QS

cos ϕ=PS

tg ϕ=QP

S=U⋅I

Pt=P1+P2+. ..+PnQti=Q1+Q2+ .. .+Qn

Qtf=Pt⋅tg ϕf

QC=Qti−Qtf

C=Qti−QtfU2⋅ω

C=QCU2⋅ω

Pt=√3⋅U C⋅I L⋅cos ϕQt=√3⋅U C⋅I L⋅senϕSt=√3⋅U C⋅ILSt=√Pt2+Qt2

P=U Z⋅IZ⋅cosϕQ=U Z⋅IZ⋅sen ϕ

Pt=PA+PBPt=|P A−PB|Qt=√3⋅(PA−PB )

η=PuPa

Q3C=Qi−Q f

Q1C=Q3C3

C=Q1CU2⋅ω