Hi, I am working on project for home energy monitoring. Problem is in Saudia arabia it has dual voltage supple 127/220 V . Kindly guide how to achieve for it and how CT needs to be installed

Not familar with this power setup, is it similar to USA: [image] Use In North America Using emonPi in USA

If you can tell us which system your supplier uses according to the IEC terminology here , that would be helpful. From the plugs and sockets listed, it would appear that there are two more-or-less separate systems for the two voltages, unlike the North American system where you, the consumer, have ac…

I have clicked pics of my panel [image]

The colours against each MCB indicate that you have a 3-phase system, and as you say “dual voltage”, that must mean that the line-line voltage is 220 V and voltage of each line to neutral is 127 V. To measure the total power and energy consumed, you need 3 CTs, one on each incoming line conductor. …

Thanks for the quick reply. So Inshorts 3 Phase Power Voltage between a phase line and netural => 127V and Voltage between a phase and phase is 220V Now I can directly connect adapter to line and neutal in the panel by hard wiring for identifying real voltage For Detecting 220V real voltage I d…

I don’t think the US a.c. adapter (120 V, 60 Hz) would be safe to use on your 127 V, 50 Hz supply, therefore I think you need to use the UK or Euro version, but on 127 V. You will need to provide a suitable socket outlet. It is perfectly OK to use the a.c. adapter at reduced voltage to measure the …

Agree I was thinking about measuring 220V on this panel . Can i directly connect to the panel 3 phase wires ?

The problem is there’s a 60° phase shift between the 127 V line-neutral and the 220 V line-line voltages, so you’d need some serious modification to the sketch to accommodate that. This is why I suggested using the a.c. adapter at half-voltage.

Suppose I just measure current flowing all 3 phases using 3 CT and add it up this would give total current As I have problems with measuring voltage. Can I multiple with voltage to get the consumption ? It would Vx(I1+I2+I3) . Would this formulae work ?

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Confused how to monitor energy for Saudia Arabia standards

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