What equipment do i need?

Getting Started
21

Which SCT-013? There are many variants. Only the SCT-013-000 is directly suitable for use with the emonTx.

SCT-013-000 and SCT-013-000V are NOT the same, if you have the -000V that would almost explain your problem. The SCT-013-000 has a 50 mA output at 100 A, the SCT-013-000V has a 1 V output.

Can I check? Your supply is 230 V measured line - neutral, and 400 V measured line - line.
And you have the “Ideal Power” 77DE-06-09-MI a.c. adapter, plugged in at a 230 V socket?

Have you set up the c.t’s on the correct cables? If the “phase rotation” is wrong, then the values you read will be wrong by exactly ½. The instructions for setting up and calibration are in the “User Doc”.

22

i got them here.

I just say SCT-013-000.

the ac adapter is in a 230v socket connectet to phase 1.

i have the Ct1 to the firste phase ct2 to the second phase and so on.

23

The text on the web page says “SCT-013-000”, but the photo is of a SCT-013-050, which is 1 V output at 50 A.

What is written on the c.t. itself?

Also

But which phase is the a.c. adapter? It must be the first phase. If it is on the second or the third, that is your problem.

24

it say sct013 and nothing else. i think i will order 6 from youre shop, then i know it is the correct one.

the adapter is on phase 1

25

Before you spend money, if you have a multimeter, take a c.t. from its cable, disconnect it from the emonTx and measure the resistance between tip and sleeve. You should read about 100 Ω if it is a SCT-013-000, or about 20 Ω if it is a SCT-013-000V.

If it is the SCT-013-000V, you can (if your electronics skills are good) remove 3 resistors in each emonTx to convert it and make it suitable.

26

i get 93.3 Ω

27

I think you DO have the correct c.t.

Are you certain that the a.c. adapter is on phase 1?
At this time, you have
c.t.1 → line 1
c.t.2 → line 2
c.t.3 → line 3

Can you move the c.t’s round, i.e.
c.t.1 → line 3
c.t.2 → line 1
c.t.3 → line 2

and then
c.t.1 → line 2
c.t.2 → line 3
c.t.3 → line 1

If one of these gives you the correct power, then the a.c. adapter is really on a different phase to the one you thought it was on.