Power Meter Parameters (EATON IQ100 Series)

[Gbawn]

Hi all,

I was hoping somebody could help me understand the difference between the parameters being read from an EATON IQ 100 Power meter. I am putting together a Modbus template to poll various parameters from the meter. The Modbus map is attached. The site we the meter is installed is a diesel power microgrid. We are interested in using the meter data to calculate fuel consumption from the Diesel gens onsite. The meter provides a number of parameters that can be polled (see attached Modbus map). I was wondering if somebody could help to explain the difference between the following parameters W-hours, Delivered , W-hours, W-hours, Net, W-hours, Total. Which parameter should we be polling bearing in mind that we are interested in fuel consumption of the diesel Gen (i.e power being delivered by the generators).

Maybe a dumb question but with the meter offering so many options its a little confusing.


Thanks in advance.
Ben

 

[thermionic1]

If I understand things correctly, you have registers for Whr-Del, Whr-Net & Wrh-Total. I think you forgot to attach the register list.

You would have to look at where the CT's are located, such as at the gen breaker, or at the utility interconnection breaker or perhaps some other location. Does the gen have any aux loads? Are they metered separately? Do you anticipate importing power? Once you have the answers that would help.

I would guess the meter would also have a Wrh-Receive register. I would think you want you calculations to be based on what the gen exports, minus the aux loads (if any). All of this depends on where the CT's are located and "seeing".

 

[Gbawn]

Hi,

Sorry I did forget the attachment. I have added it. The CTs are at the Gen Breaker and there are no auxiliary loads. I'm guessing Whr-Delivered or Whr- Total would work...

Thanks