request for feature: subtract value per CT

[ArubaUser]

Hi,

As the Emporia seems to measure in apparent power in several 3 phase setups (at least confirmed at 127/220 and 230/400, see the the chat in the forum), it would be a GREAT workaround if we could just subtract a fixed value per CT. For example I have several airconditioners that always show 140 watt too high. It shows 140 watt when the airconditioner is in standby and it shows 140 watt too high when it’s under load.

Of course the best option would be for you to fix this problem. But if it’s difficult for whatever reason, then this simple workaround would really help a lot in these situations!!

[djwakelee]

I think they need to confirm the problem and fix it.  It works great in the US for 120/240V split phase – measures real power.  But based on what I’ve read here, I’m afraid to use this in a commercial 3 phase 208V/120V US setup.  Need them to clarify what it does in that setup.

In the US our 3 phase is Y type (3 phases and center common), but there are several forms of 3 phase across the world (such as Delta).  Here is a link that describes some of the many types.  Emporia is specific that only 3 phase 4 wire Wye is supported, whereas Delta is not.  I wonder what specific 3 phase type you have.

Electrical Service Types and Voltages

Another possibility is that Emporia is purposely showing apparent power for 3 phase because that is how commercial customers are often billed.  But not always (there is some 3 phase for high-end residential), so it needs to be configurable.

 

• This reply was modified 2 years, 2 months ago by djwakelee.
• This reply was modified 2 years, 2 months ago by djwakelee.

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