Post on 27-Apr-2015
description
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