AccuCT is voltage or current output type?

Support
1

Hello everyone,

I am checking the AccuCT from IoTaWatt shop
AccuCT 200A x 25mm split-core – IoTaWatt Stuff

From the label, it reads AccuCT-H100-200:50mA, it also says 50mA rated output.
I checked the webpage of AccuEnergy, but there is only 200:330mV.
AcuCT-H100-200:333 | Split Core Current Transformer (accuenergy.com)

Are they the same product?
What is the burden resistor and the turn ratio of the one from IoTaWatt shop?
I measured the resistance between K and L pins, and it says 280ohm. I’m not sure how these values are linked to each other.

Any idea is very appreciated. Thanks
Ichiro

2

AccuEnergy makes CTs with various specifications. All of the IoTaWatt CTs are 0-50mA output. They have no burden resistors as there are burden resistors in the IoTaWatt.

3

Thanks for your explanation.
Then I might need to look further on AccuEnergy’s website.

This makes sense that 50mA * 20ohm (the burden resistor inside IoTa) = 1V. For ADC with 3.3Vref and bias voltage divider, 1V input is quite reasonable.

What I don’t understand why I measured 280ohm between the K and L pins of the CT.
And do you know the turn ratio of this CT? I want to use it for other power monitoring project but without using IoTa, just want to be sure what burden resistor to use.

Thanks very much.

4

You have all the information you need. 200A:50mA = 200 / .050 = 4000 “turns” ratio.

5

Yeah, you right.
How come I ignored that. Thanks again