Going from 1 to 3 phases

by Johan Crols on Thu, 03/07/2014 - 20:00

Hi, I just upgraded my home installation from 1 phase 240V to 3 phases (connection in Belgium). The 3 phases are 3x230, NOT 3x380+N. I have 3 clamps.

Scenario 1: if I connect the 3 clamps and measure them separately (flag as "1 phase" in setup), what do I have to put as voltage level? Since there is no "neuter", the difference between 2 phases is 230V, but the clamp only measures one phase at a time... I read somewhere that I should put it to 130V. IS that correct?

Scenario 2: If I flag in the set-up that 1 have 3 phases, what do I have to put as voltage level? Again 130, or 230? And I have 2 50 AMP and 1 100 AMP clamp... Is that possible in this configuration? Since I only have 1 sensor I can configure, what do I have to put then?

Thanks, Johan

noelis-it | Fri, 11/07/2014 - 20:39

I just connected my 3 fases in serial with 230v as a setting.(3x50A clamps)
But I've a neuter.
It's according to the below link I did the connection for the 3 phase.http://www.diskidee.be/2010/07/23/intelligente-elektriciteitsmeter/15517/

Lusili | Fri, 11/07/2014 - 20:55

Attention, this configuration is out of date!
I first connected my FLM that way but it's wrong!

See this link:
https://www.flukso.net/content/another-problem-3-phase-measuring-figures...

noelis-it | Fri, 11/07/2014 - 22:16

Thanks Lusili,

I'll change it to seperate +- connection tmr.
Any idea if 1 clam can measure 2 cables in a circuit?
Just bundle the cables and put them bot inside one clamp?

Br,
Christian

Lusili | Sat, 12/07/2014 - 08:42

I'm not a specialist but this link may be useful:

https://www.flukso.net/content/using-clamp-more-then-one-cable

icarus75 | Mon, 14/07/2014 - 15:10

Indeed. Make sure the two conductors you wish to pass through the clamp are from identical phases and that the current clamp opening is big enough to hold the two conductors.