Meters are inserted as drafting elements on the one-line diagram. You manually insert them where they belong. They are not automatically inserted based upon the model.
Use the Insert Meter command to insert a meter on the one-line diagram. Meters can be inserted on the bus of a panel or on a feeder.
Use grips to change the location of the meter. It will stay connected to the bus or the feeder no matter where you move it.
Use the Remove Meter command to remove a meter.
Use the Change Layer System command to change the layer of the meter. If the panel or feeder has a meter on it, you will be asked for the new layer system of the panel or feeder and the new layer system of the meter.
A few options for the meter graphics are included in the default customization. You can add more using the DM Electrical->Customization->Block Creation->Create One-Line Diagram Block commands.