[YK]

Athertonzd,

I install Emporia monitor 2+16 CTs at home on service 120/240Vac and not commercial or industrial. My panel has 1 + 24 breaker slots with 1+20 breakers installed. The “1” is main breaker 200Amp rest are 10 – 50Amp breakers. Main breaker inlets, leg1 leg2, used up one each large CT. I have 16 breakers monitored, 4 unmonitored and 4 empty slots. All 20 breakers have running loads.
I use multiplayer valve 2 on my dryer to save ct, this induce error as you described. If our a/c compressor fan runs on 120V we have second error.
My understanding with the term balance in this case is (leg1 – leg2 = 240V) and (leg1 minus leg2, Amp) / (leg1 plus leg2, Amp) * 100% so we may get negative % value. Because electrician call that “balance” current flow in the neutral leg.
While Emporia App may define it another way. I’d welcome Emporia to step up and clarify this. How balance % in App is calculated?

[YK]

Athertonzd – I think we will get different answers from different people. The App should explain it in the reference manual.

What if we one big coupler transformer on each 240V legs splitting into line1 and line2 of 120V each into 8 + 8 active breakers. Consider two case below :-

1) monitor all 16 active? So does balance means ( line1 minus line2 current difference / total current)?
2) monitor only 12 of 16 active? So does balance means (unmonitored line current sum / total current)?

If Emporia read this please help clarify the meaning of balance in the App – principally and mathematically.

[YK]

I have one each heavy duty sensing transformers on 240V legs and branching off to 20 breakers only 16 loads are monitored, the remain not.

so does the term “balance” in the App implies the unknown usage versus total used? Or

it means usage difference between two legs divided by total used?

Your advise?

[YK]

This kind of fluctuations worth your utility company’s attention. Just open an investigation ticket with them. This could be aged wire or junction, near your home or main watt meter.

[YK]

Mark,

which parameters we care? Was it instantaneous min, max, RMS or 3 seconds averaged.

[YK]

I have the same question too. The discrete adds up disagree with total.

BTW “balance” is another issue. It refers to split phase balance. Splitting 240V phase into two 120V differential phase. First 120V usually but always connects to lightning while the second to outlets. Balance % is the smaller of the two current divided by total current consumed.

[YK]

One way to get around NEC is to consider POE connection. This way no high voltage circuit is involved. However POE may add to complexity in the installation process and 24V supply module at the PC end.

it is a good option to have, is not used by most.

[YK]

Like your suggestions. I’d like to cast my volt here. Regards

[YK]

Let me add my volt on this feature request.

[YK]

Hi I just want to cast one vote on this request – add voltage monitoring. Further more to use this voltage value as a factor to compute kWh instead of a default value. Thanks

[Author]

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