Capacitor and Inductor in Series

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SUMMARY

The discussion centers on the behavior of reactance in a series circuit containing a capacitor and an inductor connected to an alternating supply. Reactance, which is frequency-dependent, behaves similarly to resistance in that it can be added or subtracted. Specifically, capacitive reactance is 180 degrees out of phase with inductive reactance, leading to the formula Z = iωL - i/ωC for total impedance. Additionally, a user seeks assistance in determining the appropriate capacitor size for a Kawasaki generator model GGK-26-B, highlighting the practical application of these concepts in real-world scenarios.

PREREQUISITES
  • Understanding of AC circuit theory
  • Familiarity with reactance and impedance
  • Knowledge of the formulas for capacitive and inductive reactance
  • Basic electrical engineering principles
NEXT STEPS
  • Study the calculation of impedance in AC circuits
  • Learn about the phase relationship between voltage and current in capacitors and inductors
  • Research the specifications for capacitors used in generators
  • Explore the impact of frequency on reactance in electrical components
USEFUL FOR

Electrical engineers, electricians, and students studying AC circuit analysis will benefit from this discussion, particularly those working with capacitors and inductors in practical applications.

richardstan
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Hi, if you have a capacitor and inductor in series connected to an Alternating Supply, do their reactances add up?
Thanks
Richard.
 
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Yes, reactance behaves just like resistance in resistive circuits.
 
Ummm, they add like this 5 & 4 = 1.

Capactitive reactance is 180 degrees out of phase from inductive reactance, so you actually subtract one from the another.

It's good to go back to the definitions. In series,

Z= i\omega L + \frac{1}{i\omega C}

where X_{L}=Im(Z)
 
Last edited:
I miswrote, sorry. I thought I saw "impedance" instead of "reactance". But why are you considering reactances and not impedances? The former is part of the latter.
 
I have a generator that needs a new capasitor and I cannot find one any where! can someone tell me what size I need for a kawaqsaki 5.0 ops FA210D modle number: GGK-26-B serile number KJ19-78B
KW: 2.65 Amps:22 KVA: 2.65 Phase:1
voltage: 120 RPM:3600
HZ: 60
would appreciate anyons help!
russhart70
or give me a formula,? PLZ.
 
Phrak said:
Z= i\omega L + \frac{1}{i\omega C}
= i\omega L - \frac{i}{\omega C}

because: 1/i = -i

So, they subtract.
 
it has been 12 years since i graduated collage, and can't quit understand the formula, I wired two capasitors together and now I am pushing 175 volts out of this generator? cannot rember wat I did?? I am a licenced electrician, and I guess its been to long since I have had to figure this stuff out!
 
goin to get my books out real quick!
 
do not understand wat L = wat I know is P=wats I = amps E=volts R=omes
 
  • #10
I guess I AM
 

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