Hi,

I have a question regarding the wem3046t.
It is important that the device shows the correct consumption value ( ct ratio) on the local network.
In the cloud service I can set the ct ratio value, but on the LAN network the default setting is 1:1 ct ratio.
How can I change this value?
It is important because I want to read the device on LAN.

Thank you for your help,

I look forward to your feedback,

Best regards,

Erdman

Hi:

Because the energy meter can not communicate with CT, it can not know the Ct ratio automatically.

As you said, if you use the IAMMETERcloud, you must set the CT ratio manually.

If you request the data locally (by modbus/tcp or local API), you should multiply the ratio either from the master side.

we do not provide a ratio parameter that can be set and stored in WEM3046T yet.

So when you request the data by the master, you should also consider the ratio.

you need to multiply the ratio to the replies of current ,active poewr and kWh.

Thank you for your reply.

In the near future, is it expected that the ct ratio will be adjustable on the wem3046t?

BR

Erdman

In fact , we once consider adding a configurable ratio parameter in the WEM3046T.

But we thought if the ct ratio is set from the energy meter, it would confuse the user when they connect the WEM3046T with another CT but do not know how to change the CT ratio.
I also thought when the user request the data from modbus/tcp, it would need to do some development work, it would also easy for them to multiply the ratio parameter in the replies.

This is why we do not provide a ratio parameter in WEM3046T(https://www.iammeter.com/products/3046t)

Thanks for the answer.

I think that the wem3046t device will primarily be used by companies, because the /5 CT gives the possibility to measure higher power. (e.g. 630 A or greater)

I am currently working to make this product known to many companies, because I think it is a good product.
The companies commission an electrical contractor to install these devices, they do not install these meters themselves. Only qualified people can install current transformer measurement in higher-power electrical distributors. They also set the current transformer ratio for measuring devices of other makes. If the meter needs to be moved, they will also do it, because the current transformers must also be installed. (like we do for example)
So I don't think it's a problem to adjust the current converter ratio on the device again and again, because we do the same with other devices.
When I mentioned reading on the local network (LAN), I meant the local monitoring function of the cloud service. I also think the Local monitoring function is good and I show it to customers, who also like it and are using it more and more. (primarily due to the 1s time interval data display)
Now the wem3046t device cannot be used with the local monitoring function, because it is difficult to continuously recalculate the data for a 2500/5A measurement, for example.
(I am currently giving a quote for such a project)
I think it is a good idea if it were possible to set the ct ratio in the device, because then it would show the correct value on the LAN network as well (for example, local monitoring). And if the device has to be installed in another place, then the counter would show a value corresponding to the previous ct ratio on the LAN network.
If there will ever be such a development, I would recommend, for example, encryption or a hidden function, so that not everyone can access this function with a simple IP-based access.

Sorry for such a long post, I just thought I'd write my opinion.

Thanks,

Erdman

Hi,

I think there was a misunderstanding.

When I wrote that I use local monitoring, I meant that I access it by Ip address on a local network ( cloud/ labs / local monitor)

- Of course yes, multiplication is not difficult, but I will not be looking at the data on local monitor , but the customer for whom I want to install this device ( as I mentioned I just gave an offer to install more than one.)

ID of the wem3046t: 04A69Cxx (of course I can send it privately ,if you need it)

My letter was just a suggestion , nothing more .

Thank you for your understanding,

Erdman

laoliu

Thanks for your suggestionBut I am a little confused as below"Now the wem3046t device cannot be used with the local monitoring function, because it is difficult to continuously recalculate the data for a 2500/5A measurement, for example."Please let me know which device have you used to request the data from wem3046t locally and which type you used (HTTP API or Modbus/tcp)In fact, what you need to do are just1 request the data .2 multiply the ratio factor of 500(if you use 2500:5) for current ,po

Hi:

I get your points now.

You mean this function ,https://imeter.club/topic/459

Yes?

we will plan to add a ratio parameter in cloud/lab/local monitoring.

Hi,

Yes, that's what I meant.

Thank you.

BR

Erdman

Please check

we have add such setting in the local monitoring 

Hi,

I checked the option. It works !  Thanks for the quick change.

Best regards,

Erdman