This meter uses external CTs. It is setup to be used with our 200 amp CTs. With these CTs you can read your kWh consumption right off of the face of the meter. If you want to use larger CTs you can. If you use 400 amp CTs you will have to double your kWh read.
This meter is for 3-phase 3-wire systems, this is 3 hots and no neutral.
You can read this meter remotely using RS-485. Read up to 256 of these meters per communication converter within the building using your computer or over the internet from anywhere in the world.