I recently ordered the SCT-013-000 but received SCT-013-000V by mistake. From the product range I see this is the difference:
SCT-013-000 Primary AC current: 100A Secondary current: 50mA
SCT-013-000V Primary AC current: 100A Secondary voltage: 1V
Can I remove the two burden resistors within the SCT-013-000V to make the sensor into an SCT-013-000? I.e. from VT to CT; what about the TVS, is the same TVS inside the CT and VT models?
You can remove the burden within the -100V, but you really need to have the TVS - because there wonât be one in the -100V while it has the internal burden (or if there is, there is no need for one â meaning I donât wholly believe the YHDC data sheet).
If there is a TVS present, leave it there. If there isnât, you need a bipolar TVS, or a pair of zener diodes, in series but facing opposite directions (i.e. A-A or K-K). Almost any voltage will do, 5.6 V upwards to say 12 V - the sole purpose is to give the c.t. a load to hold the voltage down if itâs disconnected from the external burden, the one inside the emonTx, emonPi or on your breadboard.
It wonât exactly be a SCT-013-000, because I think the âvoltageâ versions have a slightly different number of secondary turns (1860 vs 2000 nominally), youâll need to adjust the calibration to take account of that. I think the ratio will be 100 A : 53.76 mA
if you can measure the internal burden after youâve got it out, Iâd be interested to know what the value is.
I presume youâve figured out how to take the c.t. apart â there are two plastic âspring clipsâ that hang over the edge of the bobbin, push those aside (this needs 4 hands) and the core and bobbin will slide out.
Many thanks Robert, Iâve taken it apart, will measure and update this thread.
On opening the VT I see 2x resistors plus a diode (?); I want to remove the resistors, Iâm not sure on that third - leave in, remove, or replace?
Well, now thereâs TWO surprises. 
First, the large component marked âWPâ is the TVS, which I donât think is needed when you have burden resistors, but they seem to think so (or maybe itâs too much trouble to leave it off). You need to keep that, but remove the two resistors (the 22 Ω [labelled 22R0] and the 220 Ω [labelled 2200]).
The second surprise is the value of those resistors. In parallel, they make exactly 20 Ω, which means the c.t. winding is 50 mA, so itâs exactly the same secondary as the SCT-013-000 without the âVâ.
Those resistors need to go - a soldering iron with a bit big enough to cover both ends of the resistor at the same time works very well, melt the solder and wipe the resistor off with the iron.
Do be careful and whatever else you do, donât break the secondary winding wire. It is very delicate.
I am also in the same position, got the SCT-013-000V instead of without, is it just as simple as remove the two small resistors ?
Here is what i see
Yes, that what you need to do.
I see the one resistor is a different value (120 Ω - â1200â) - presumably they found the 22 Ω (â22R0â) one was at the high end of tolerance - or something else has changed a little. Things like this arenât unexpected, but it might mean youâll need to tweak the calibration constant a little to get the best accuracy.
