I am upgrading my mains to 100A 3 phase and need to upgrade my energy meter. I currently have a VM-3P75CT. Ideally, larger CT’s connected to the current meter would be a great option but it doesn’t seem to be supported yet (if it ever will be).
I have been looking into the ABB B24 option but there are a few thinks that dont make sense. The supported meter on the Victron document “ABB B21, B23 and B24 Energy Meter”, part number
2CMA100183R1000 Silver, which is the ABB Model B24 352-100. This is rated for 1A CT’s (secondary), on the Victron doc it gives a link to supported CT’s (the link is broken but I still found by searching the doc number) but these are all 5A rated CT’s.
Is this done intentionally? Possibly to increase the accuracy of low power readings which would still be within the maximum current of the meter at the CT’s rated but would potentially exceed the meter maximum for i.e. motor start currents. Am I getting this correct and should I be looking at a 5A rated version of the meter? As far as I can tell the modbus map for all this meters has the same registers (even the A series meters I looked at had the same, just other registers for the extra info).
I’m trying to avoid buying a meter that either isn’t correct for the application or isn’t compatible with Venus.