X/R Ratios
X/R Ratios
(OP)
What is the X/R ratio. If you are given the %impedance and the X/R ratio can you find the total impendance. Is the % imepedance given the reactive portion, then do you use the x/r ratio to get the real portion.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: X/R Ratios
Is this a homework question?
yours
RE: X/R Ratios
Mike
RE: X/R Ratios
Did I mean the law of cosins instead of the quadratic equation. Sorry if I caused any confusion.
yours
RE: X/R Ratios
a) Rate of decay of the dc component.
b) Degree of asymmetric
c) Interrupting capability rating of protective devices.
ii) If you are given the % impedance and the X/R ratio can you find the total impedance. No. To obtain actual values of X and R, the total impedance is needed in actual values not in percent. The best that you could get is the %X and %R as follow.
X/R = tag(q) ==> q=atan(X/R)
%X = %Z.sin(q) & %R=%Z.cos(q).
iii) Is the percentage impedance given the reactive portion, then do you use the x/r ratio to get the real portion. Appears that you are confusing impedance with reactance. The following relation should be considered.
%Z = %R + j.%X Where: j = (-1)^1/2
|%Z| = (%R^2+%X^2)^1/2
The between the impedance and reactance percent of impedance
RE: X/R Ratios
respectfully