The installation of a Type B RCD in series with the EV charger is one option to remove the risk of a Type A RCD becoming inoperable, but it can add at least $300 – $400 to an EV charger install.
...Thanks, we will be using a burden res.A fluxgate sensor without feedback is no fluxgate anymore...
A normal CT without burden will create high output voltage, the core will saturate, the output signal will be distorted.
What´s your idea?
Thanks, thats right, and the voltage that gets looked at, is simply the voltage across a low value resistor in series with the coil.....(its put in series with the coil "gnd" connection and ground)........and you then see either a symetircal waveform if no DC and no imbalance...or otherwise its non symetircal..........in fact, all you have to do is buffer it, filter it, then read it into an ADC....and its job done. Why is not everybody doing it like this?.....no feedback is needed.you can drive a square wave into a multi-turn coil on the toroid, and look at the ave voltage on the wdg terminals, this will shift with the DC current thru the main current carrying conductor, so this is one way, albeit with variable accuracy, to measure DC, or slow-ish AC
The average voltage across a transformer winding is zero, unless asymmetrical saturation current and respective voltage drop across the winding resistance causes a DC voltage component. More specifically, saturation can be detected by looking at the 3rd harmonic, which is the usual method applied in fluxgate sensors.you can drive a square wave into a multi-turn coil on the toroid, and look at the ave voltage on the wdg terminals, this will shift with the DC current thru the main current carrying conductor, so this is one way, albeit with variable accuracy, to measure DC, or slow-ish AC.
Thanks..I think you'll find a square loop core will work better
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?