Balance figure not negligible

[marcogtt]

Hello, i’m trying to debug an issue i’m having on the emporia monitoring, specifically related to the power sensed at the heatpump (with inverter)

The heatpump is a 3 phase 400v and i’ve been told from the producer that it has the compressor balanced across the 3 phase while the 2 fans (negligible consumption) are single phase each and each loaded on 1 phase respectively.

 

Now by monitoring the system with just the heatpump loading the circuit, for quite a while, i can conclude, that i would be able accurate enough monitoring a single phase only with a multiplier 3x.

 

The issue I have is that each phase, has a ghost consumption of 100w approx when the heatpump is idle (no operation at all). This consumption do not really exists as it get also balanced out in full and my net consumption is 0.

So i’m quite convinced this has something to do with the frequency converter, but it is not negligible as it accounts 300wh constantly (and doing the math it makes 7.2 kw / day).

 

all other inputs are capped, i would expect no contamination in TA reading.

 

Any thoughts?

 

TY

 

Marco

[djwakelee]

Might want to check the forum regarding issues with 3 phase.  People seem to report the mains sensing is ok and properly showing true measurement in Watts (real power), but that the circuit sensing is actually telling you VA (apparent power).  Or other bugs like that.  People generally believing that 3 phase just doesn’t work correctly with the Vue2.

[OrrinC]

Is there any way to graph the “Balance” load? That would help greatly in identifying whatever is not being monitored!

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