is there way to bring "microstation 3d" models from drawings into "Bentley substation 3d" ?

There is a dedicated Forum for Bentley Substation and related products.

In general, any application that uses MicroStation as  a platform can manipulate graphics objects. 

Perhaps you could elaborate about

is there way to bring "microstation 3d"  models from drawings into "Bentley substation 3d"

Do you want to ...

1. Copy elements from another DGN model into your Substation model? 
2. Attach a 3D model as a reference to your Substation model?
3. Place a model in a DGN file or cell library as a cell in your Substation model?
4. Do something else?

PDF this one of our 3d models made in microstation V8i. each individual item within the model is a cell (non-intelligent 3d). we would like to take this model and import it into Bentley Substation drawing and assign the cells intelligence

Unknown said:

we would like to take this model and import it into Bentley Substation drawing and assign the cells intelligence

One approach is to attach the DGN 3D model as a reference in a Substation 3D model.  Then copy each component from the reference to the active model. 

Once copied, you can detach the reference and add 'intelligence' to the newly-copied cells.

What is Bentley Substation?? Is that for designing sandwich shops or underwater vessels?