LF: : Current Transformers (off topic, but expertise probably here)

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LF: : Current Transformers (off topic, but expertise probably here)

from [Andy Talbot]

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To:	[email protected]
Subject:	LF: : Current Transformers (off topic, but expertise probably here)
From:	"Andy Talbot" <[email protected]>
Date:	Sat, 17 Sep 2005 10:33:43 +0100
Delivery-date:	Sat, 17 Sep 2005 10:34:20 +0100
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References:	<000001c5b9f2$d48dbc90$e6a4c593@RD40002>
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Thanks for your responses to this.  I reduced the burden resistor to 440
ohms (for 0.1V/A) and got adequate linearity (with only 1V across the 240V
secondary ! )  and have now managed to capture the voltage and current
waveforms needed for the analysis.

It really was a nasty little transformer.  Next time I need to monitor mains
current waveform will go the optical isolator route instead.  They can give
quite good linearity if used with care and a bit of feedback.

Andy  G4JNT



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LF: Current Transformers (off topic, but expertise probably here), Andy LF: Re: Current Transformers (off topic, but expertise probably here), Alan Melia LF: Re: Re: Current Transformers (off topic, but expertise probably here), Andy Talbot LF: Re: Re: Re: Current Transformers (off topic, but expertise probably here), Alan Melia Re: LF: Current Transformers (off topic, but expertise probably here), Alberto di Bene Re: LF: Current Transformers (off topic, but expertise probably here), Alberto di Bene LF: Re: Current Transformers (off topic, but expertise probably here), Vernall LF: RE: Current Transformers (off topic, but expertise probably here), james moritz LF: : Current Transformers (off topic, but expertise probably here), Andy Talbot <= LF: ZM2E LF DX attempts 4 - 6 October, Vernall LF: Re: ZM2E LF DX attempts 4 - 6 October, Alan Melia

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