Three-phase energy calculation option

[glynhudson]

• Added option to calculate 3-phase energy (multiple current by the square root of 3)..
• Disabled by default

My notes on three-phase calculation:

- P(3ph) = V(LN) * I * 3
- V(VL) = 230V (line to neutral voltage)
- V(LL) = V(LN) * √3 = 230 * 1.75 = 400V

[lincomatic]

thanks for the PR. Next time, please squash your PR's into one commit.

[beikeland]

Seems it got merged as * 3 instead of * sqrt(3) (or * 1.732 )

[lincomatic]

We have to keep the math as integer. Any comments, @glynhudson ?

[glynhudson]

Sqrt(3) is only required when calculating power using Line-to-line voltage (usually 400V) when using Line-to-neutral voltage (usually 240V) multiplying the current by three is all that's required. See my notes on calculation in the PR above.

[beikeland]

But in a IT network the line to line voltage is 240, most TN networks the line voltage is indeed 400, and some TN networks (i forget if its TN-C or TN-S, the line to line voltage is still 240); so some clarification on some level is probably a good idea. More to the point a Type1 car will still only charge off single phase 240V regardless of the line to line voltage.

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On Thu, Jun 28, 2018, 17:54 Glyn Hudson ***@***.***> wrote: Sqrt(3) is only required when calculating power using Line-to-line voltage (usually 400V) when using Line-to-neutral voltage (usually 240V) multiplying the current by three is all that's required. See my notes on calculation in the PR above. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#84 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACk5bqMLcxTqeBMYQtFIubhX3ynKOk-xks5uBPwogaJpZM4Sn5rN> .