How do you use your CT Clamp Energy Monitor?

[orange-assistant]

@vaderag

CT Clamp energy measurement is propagated throughout the smart home community

CT (current transformers) are also part of non-contact power meters - but alone they are not more than current meters (the name implies).

@vaderag

But every post you have is saying that they’re (worse than) useless?

I have the intrinsic goal that people educate themselfs. For that I mostly give hints/links which should give the reader enough clue to learn the basics and come to their own conclusion.
Sadly most users don’t take this extra 3 minutes, or did you @vaderag open the link in my previous post which might have your post made obsolete at best?

@orange-assistant

What could possibly go wrong?

@vaderag

are you just the only person out there that understands this?

No, at least @Jpsy knows about it and was so kind to even explain it.

@Jpsy

About Cos Phi:
To calculate the power P from the current I and the voltage U you also need the cos phi (“power factor”).
This is the phase shift between the sine wave of the current and the sine wave of the voltage.

P = U * I * cos phi

Some times I think we are not only living in a post-factual society but maybe also reached peak of education already

@vaderag

Is there any scenario where a CT clamp can be useful

Definitely. Most obviously as part of (real) power meters.

@vaderag

What would you say to be the correct way to do this

I emphasis that you first understand why you will not be able to get real/active power readings with a current meter (start with link provided in my previous post and also don’t be shy reading some wikipedia articles) and after that, do your conclusion! Feel free to share it with us