Current Sensor SCT013 overload

[Tobi993]

Similar, but I take the EasyESP PME devive to transmit it over MQTT

...and it says nothing about over current.

[Domosapiens]

Could be a little late,
but these give a DC output

Bought here:
https://nl.aliexpress.com/item/YHDC-SCT ... 263.rkS8cu

[papperone]

Nice findings those new "digital" version which outputs 0-5VDC
I guess I will order one for testing...

[grovkillen]

"built in overload protection" thumbs up!

This one is rated for 50A:
https://www.aliexpress.com/item/Free-sh ... f831&tpp=1

[papperone]

yep!
just placed order for 5A, 25A and 50A models

[Domosapiens]

@papperone:
50 Amp? What do you do with that?

[papperone]

@papperone:
50 Amp? What do you do with that?

At home my power meter is abel to provide up to 6.6kW, which divided by 230VAC brings to almost 30A (28.8A) thus the 25A could potentially get saturated...
(yes we have a very big house and in summer time with all airco pumps on we consume a lot of energy

[Domosapiens]

with all airco pumps on we consume a lot of energy

.
Wow! If you need airco, then it is time for some solar panels!

This is how I use the clamp.
A short extension wire, where Lead (brown) is separated from Null and Earth:

20171110_150020_small.jpg (522.82 KiB) Viewed 17951 times

With this cord I have the plan to define the state of my gas heating system (CV in Dutch):
Standby/Pump running/Heating gives 10/70/90Watt.

[TD-er]

@Domosapiens.
Just make sure you don't "reken jezelf rijk" (Dutch for over-estimating things)
The power consumption of a pump is quite hard to measure, since its cos-phi is almost never equal to 1.
In other words, when measuring with a clamp, you have to take the Voltage into account or else you will miss the phase shift and then your estimate will be too high.

[Domosapiens]

@TD-er
Yes I know about cos-phi.
But my application is to define the state of the CV (boiler/heater).
No need for precise Watt reading.

Btw:
Seen your nick-name: are you (former) RNLN?

[TD-er]

@TD-er
[....]
Btw:
Seen your nick-name: are you (former) RNLN?

Nope, had nothing to do with RNLN.
I'm active with the same nick on Tweakers.net

[parbar]

Hi,

I jump in to this thread, hope its ok. I'm also interested of the SCTD 010T as it sounds easy to connect to an arduino as it has 0-5 v output. My goal is to measure the mains to the house, both for fun and also to check distribution of the loads (3-phase system). Then of course some kind of warning when current is high and risk of blowing a fuse.

I have not seen the SCTD 010T until this thread and there are limit info on the internet. Already been playing with the sct 013 (emoncms) but the SCTD 010T seems easier just to plug into an adc port.

Have you guys recived your SCTD 010T (thinking of papperone and Domosapiens) and can give some hands on feedback?

Thanks,
Pär

[Domosapiens]

As you can see in the previous picture, I have the SCTD 010T-5Amp.
It's under test.
I use it to measure the type of activity of my central heating.
Central heating using between 10-100 Watt.
SCTD 010T-5Amp results between 8 and 60mV on the breadbord.
For me there is no need to re-calculate it to Volt*Ampere (VA).
(calculation to "Watt" is not possible, because you don't know the phase relationship between Volt and Ampere)
From the 8-60mV, I can define the state of the central heating (off - pump - burning).
Currently experimenting with a "running average" filter for the 10 second samples: (Vt + Vt-1 + Vt-2)/3 to smooth out some inductive start-peaks

[parbar]

Thanks fro the reply. I think I will make an order soon for the 50 A version. I notice that they have in 5 packs on aliexpress.To bad its not 6 pack then I would have for 2 three phase setups.

[Domosapiens]

You can ask !
Put 5+1 in the shopping card.
Go to payment.
Select other method and stop.
Message the seller and ask to adjust the price of your card.
It did work for me a few times with other shops.

[tchi59]

Hi
I am a little bit lost in that SCT clamp
If i am right there are 2 kinds of SCT
1/ SCT-013-000 Primary AC current: 100A => With current output
2/ SCT-013-005/010/020 Primary AC current: 5A => With voltage output

Let 's explain my project.
I want to use an ESP32 to read AC consumption at home (230V)

questions:

1/ What is the best solution in term of CT Clamp (current or voltage) ?

2/ How to interface CT Clamp with ESP32 micro controller ? do i need a dedicated card ?

3/ What library to use in arduino ide?

Thx in advance
Best Regards

[TD-er]

These are just simple convertors from AC current to DC voltage.
So there's nothing really needed as ESPEasy has support for lots of ADCs.

But why not use something like the PZEM-004Tv30 ?
See: https://espeasy.readthedocs.io/en/lates ... #p102-page