Current Cost Support Forum

(I am located in the USA)

I have an ENVI energy monitor with a single transmitter and two current transducers (plus a web bridge). The transmitter has 3 sockets total and I am using 2 of them for the 2 current transducers.

My home has 2 independent 200A circuit breaker panels, each being fed by a 240V single-phase pair of wires. I can clamp the current transducers on one or the other of the 240V feeds and monitor the energy usage of just that one panel, but what do I need to monitor both at the same time?

Do I need to buy a second transmitter and 2 more current transducers? (If so, what are the part or model numbers of what I need?) Will my monitor be able to display (and hopefully total) both circuits?

Can I do something "clever" like clamp one of the CT's on a single wire of one feed and the other CT on a single wire of the other feed and then double the displayed Watts? (I am thinking this might actually work if I clamp on the opposing phases.)

Thanks!

Are both panels fed from the same electric meter?

If yes, can you move the clamps and transmitter to that location?

Automan.

Yes, they are both fed from the same meter, but I do not have access to the wiring at that location (it is inside a locked metal box that only the utility company can access).

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American households typically have a 3 wire single phase and neutral system.

220v between the phase lines and 110v between a phase line and neutral (the 220v needed for larger appliances e.g. the cooker, washer / driers and ac units).

Thus they need two clamps on the two phase lines to measure the house load.

In the UK a property would typically have a single phase and neutral system giving you about 230v (one clamp on the phase line) or a three phase and neutral system with 415v between phase lines and 230v phase line to neutral (3 cc clamps on the phase lines).

Automan.

_________________
Seeker
"The Truth is out there!"

_________________
Seeker
"The Truth is out there!"