Hi,
Do you have some features with elevation values you want to look at in 3D?
Or are you just needing to look at some 3D maps for context?
I have electric network and I want to see loading of lines and voltages of buses.
You mention elevation features; however, based on the description it sounds like you are looking for guidance on setting up display filters to display different features and/or labels at different scales.
Depending upon what you are looking to achieve, Containment Associations can also be used to control the level of detail shown in the map.
Does this align with what you are trying to achieve?
Jon
how about this as a starting point?
https://learn.arcgis.com/en/projects/get-started-with-the-arcgis-utility-network/