Re: Household electrical current to Excel ???

[nobody@xxxxxxxxxxxx (Dave Houston)]

Dan Bloomquist <public21@xxxxxxxxxxx> wrote:

>Dave Houston wrote:
>> With the proliferation of switch mode power supplies and other non-linear
>> loads, you need a much higher sampling rate.
>
>You can low pass the sensors, i.e., integrate the window. Both the
>current transformers and the voltage transformer have a low output
>impedance, so the delays will match up.

It's not just a matter of phase but of non-sinusoidal wave shapes. You must
sample frequently to get an accurate picture.