my manager ( a master electrician ) ended up being examining a capacitor for an A/C device. The capacior is ranked in uf’s and then he wished to transform it to ohms. I did not believe it absolutely was feasible but he appears to believe there was a formula to transform microfarads to ohms.
The capacitance worth of a capacitor in Farads and it`s resistance to present movement in ohms tend to be pertaining to both however they is not transformed straight from 1 device to a different since they are the fundamental products of two various things.
The capacitive reactance of a capacitor in ohms (X of c) is distributed by (X of c) = 1 / (2 pi fc).
Including the reactance worth in ohms of a .05uF capacitor running at 500Hz matches the reactance worth in ohms of a .025uF capacitor running at 1000 Hz. Using this you can observe that a capacitor of confirmed Farrad worth cannot be assigned a distinctive ohmic worth.
A capacitor including the one out of air conditioner device cannot generally alter sufficient in capacitance worth to result it`s work inside circuit. Ordinarily whenever an individual fails it’s going to initially brief completely after which burn off it self available. In any case your manager could identify this with an ohm meter. A gradually increasing large reading regarding ohm meter shows the capacitor might be nevertheless great and undoubtedly a zero ohms reading shows the limit is shorted. No defection regarding ohmeter shows the capacitor is available and it is of no worth inside circuit.
From your own concern, it feels like your supvr ended up being planning to check out the begin or operate capacitor together with ohmmeter.
Regarding examining a capacitor with an ohmmeter, one watches for meter to move from 0 ohms whenever very first linked to an extremely large reading following the capacitor has already established time for you to charge.
If the prospects tend to be corrected, the meter should move (if a switch kind) violently to 0 after that rise to an extremely large reading. An electronic meter would probably review – ohms or perhaps -voltage as soon as the prospects tend to be corrected following the very first check.
If he desires capacitive reactance, the formula is Xc=2pi*(f*C)
There’s no direct transformation for µF to Ω. The 2 tend to be expressions various characteristics.
You’re appropriate, perchance you ought to be supervising him.
Microfarads tend to be a product of capacitance and ohms tend to be a product of opposition. A capacitor has actually a reactance (= AC opposition) that will be calculated in ohms. This will depend regarding regularity for the AC and it is distributed by:
Z = 1 / (2 x PI x f x C)
in which Z is reactance in ohms, f is regularity in Hz and C is capacitance in farads.
He had been demonstrably searching for the reactance for the capacitor, nothing like transforming ins to centimeters. Therefore, Xc (reactance of a capacitor) = 2 x pi x regularity x capacitor worth in farads
Inductive and capacitive reactances could be expressed in OHMS. Note they are reactive ohms, maybe not resistive ohms.:
Capacitive reactance (in ohms):
XC = 1 / (2 * pi * f * C), in which f could be the regularity and C could be the capacitance in Farads
Inductive reactance (in ohms):
XL = 2 * pi * f * L, in which L could be the inductance in Henrys
Possibly he had been following the impedance. If so:
Z = 1/jwC
In which j could be the imaginary device (sqrt(-1), you’ll types of ignore this in the event that you simply want the quantity),
w could be the angular regularity (or w = 2πf, in which f could be the regularity, e.g. 60Hz),
and C could be the capacitance.
Therefore for instance, if the circuit ended up being running at 60Hz, the impedance would-be (presuming around 1 uF):
Z = 1/j(2π*60)(1uF) ~ 2600 Ohms
You are appropriate, you are chatting oranges and oranges right here. Your manager is both testing you, or he understands “jack-squat.”
micro-farads is a product of “capacitance” (C)
ohms is a product of “resistance” (roentgen)
You just cannot transform someone to others.
Good-luck with this particular quack!!!
If what you’re speaing frankly about is an engine start/ run capacitor, my estimate is he could be following the reactance, as the worth should determine just what present flows inside windings.