I am developing a project that consists of measuring the consumption of a power strip (not sure how it is in english/figure below). I'm already able to measure the instantaneous voltage using a voltage transformer. My next goal is to measure the current.
For this task, I found that I could use a current transformer with a high power burden resistor to reduce the current in proportion and generate a measurable voltage to be sampled in simple ADC
I got the transformer (figure below), but did not get any datasheet or information on how to use it. The only information I could decipher surfing the internet was that the "class" label indicates the error, which is,
Where I live, the power grid works in
220V-RMS/60Hz. This current transformer serves for this purpose? What is the maximum current it can handle (assuming
220V-RMS)? What does it means the other informations? And above all, what does it means
1.5 VA? It is the maximum apparent power that it can handle?
The circuit I designed to interface between the ADC and CT is in the figure below. Consider that the current source is the CT, because the simulator that I used has no such component.
This schematic is correct?
Last question, should I put both wires (phase and neutral) in the current transformer, or only one of them?