At 08:33 PM 5/10/02 -0400, you wrote:
>One obvious and potentially dangerous problem with the circuit referenced
>below: there is no burden resistor shown on the current transformer. This
>can result in some really nasty high voltages on the terminals of the CT.
>
>Bob Ammerman
>RAm Systems

I was thinking that was an error on the schematic, but perhaps they are
using a ferrite-core CT like those used in SMPS units that self-limits.

Anyone trying this with a typical 100A:5A CT could well find a smouldering
crater where the LM324 used to be.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu