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#### treez

##### Guest

I have a 50KHz sinusoidal current which I must detect. The current is full wave rectified, so its actually pulsating DC half-sines.

The current is sinusoidal, but may be an average of 1A, or 2A, or 3A, or 4A…………..to 10A.

I must detect whether it’s a 1A, or a 2A , or a 3A……to 10A, that’s flowing………so I don’t need great accuracy, just to depict which one of these current levels it is that’s flowing.

Here is a picture of the 10A average rectified current that I must detect…..

https://i46.tinypic.com/2mxpjdg.jpg

….Do you think this is best done with a current sense transformer?

…..The DC level for the 10A one, is, exactly that ..10 Amps, and that seems an awful lot to put through a current transformer…transformers don’t like DC, surely.

I was wondering of the B82801B0205A100 (1:100) current sense transformer is up to this job?…..

B82801B series C.T. datasheet:-

https://www.epcos.com/inf/85/ds/b82801b.pdf

….the frequency range for almost all off-the-shelf current sense transformers is either 20KHz-50KHz or 50KHz-1MHz.

…..this makes it awkward for me because I am right on the boundary…i.e. 50KHz.

Also, the equation on page 5 of the B82801B series datasheet has a “duty cycle” parameter in it……..though my waveform, (shown above) is just a continuous train of half-sines…….so I don’t know what to put in for the “duty cycle” parameter?

So anyway, do you think the B82801B0205A100 C.T. will be OK for this job, and not saturate?