Thankyou very much indeed....also , presumbaly the "(30)" is the maximum current permitted?10A / 10mA is the CT ratio, 1000:1 in this case
...thanks this is fantastic...and i assume it applies only to ferrite?...as iron and powdered iron have a permeability which changes as B increases.The formula for calc B in a CT is the same as for any other Tx
dB / dt = V / ( N. Ae ), so for a swing of +/- 100mT, with a period of 10mS each way ( 50Hz ) and we assume a ferrite core of 5mm x 5mm cross sectional area, = 25mm^2, then we get a Vave / N = 500 E-6
Thanks, was referring to a way of reading the output (secondary) of a 50Hz ferrite CT that ive seen on this forum a few times before.....it involves application of a somewhat high-ish frequency.......i'll see if i can dig it out, unless you may know of it? Maybe those who know of it won't divulge for entirely understandable and honourable reasons..there is no "more news" because there was no "old news" a buck inductor is not a CT, quite some way from it in fact.
Thanks...as you know, with iron CTs, (unlike ferrite CTs) , its very easy to get a very high secondary inductance, and thus get a very low secondary magnetising inductance...and thus less distortion to the signal coming out of the CT secondary.why the assumption only for ferrite ?
there is no better way of reading mains freq current from a CT than using it as a plain CT.
Thanks, in this case, mains 50Hz...is that what you meant by the "low frequency"?...or lower?usually used for DC and low freq AC sensing
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