VoltzElectric
Member
- Location
- Hudsonville Michigan
Im trying to figure out what size capacitor i need. not sure how to symbols, but i will do my best here.
Reactive power (Q) = (sq. rt.)of (apparent power(s))2 - (true power(P))2
so then:
Q=E2/X
or
X=E2/Q
this is the part i need help with. When im working with 480 motors, I would just use the (480)2, not (480 x 1.73)2?
Seems clear as mud to me. lol.
so continuing on this it what i went with
X=(480)2/107kvar
X = 2.153 ohms
then Xc= 1/2(pi)C...............or C=1/2(pi)Xc
so....
C= 1/2(pi)(60hz)(2.153 ohms)
C=123.2 uf
am I correct in my math? I am trying to size my motor capacitors to bring my powerfactor closer to 1.0
Reactive power (Q) = (sq. rt.)of (apparent power(s))2 - (true power(P))2
so then:
Q=E2/X
or
X=E2/Q
this is the part i need help with. When im working with 480 motors, I would just use the (480)2, not (480 x 1.73)2?
Seems clear as mud to me. lol.
so continuing on this it what i went with
X=(480)2/107kvar
X = 2.153 ohms
then Xc= 1/2(pi)C...............or C=1/2(pi)Xc
so....
C= 1/2(pi)(60hz)(2.153 ohms)
C=123.2 uf
am I correct in my math? I am trying to size my motor capacitors to bring my powerfactor closer to 1.0