When you associate a single line diagram symbol to a detailed schematic symbol, you have the option of copying the descriptions, catalog values, installation/location, ratings or all of the above. This options should be set as default to "all of the above" otherwise proper association between the two devices is not set.
![Capture.PNG Capture.PNG](https://forums.autodesk.com/t5/image/serverpage/image-id/132603iA8148D5D195C76CC/image-size/original?v=mpbl-1&px=-1)