Keep in mind that the burden (load) on a current transformer increases as
the secondary load resistance increases. Keep the resistance as low as
possible and still develop adequate measurable output. I have never seen
current transformers without a either a resistor or coil directly across the
secondary, but it might be done. I think that unloading the secondary, even
momentarily until diodes are forward biased, is not a very good idea.
Depending on diodes and or long leads to a meter seems unnecessarily risky.
An unloaded secondary can develop destructively high voltages across the
secondary and high voltage drops in the primary along with excessive heating
of the transformer. Ideally, current transformers should have zero volts
across both primary and secondary.
Don Young
Don Young
"Ignoramus19198" wrote in message
.. .
On Wed, 14 Dec 2005 08:39:24 -0800, Jim Stewart
wrote:
Nick Müller wrote:
Jim Stewart wrote:


Yes, assuming that you haven't exceeded the primary
or secondary current ratings for the transformer.


Wouldn't a hall sensor do a better job?
I mean with all the square wave and changing frequency a current
transformer seems to be not the best choice.
And if he is in DC ...

Well, since it is Iggy that posted the question,
he probably has a big bag of surplus CT's that
he bought for $.50 (:

No, I only have very few CTs, I need to use them for my phase
converter measurements.

i