In a radar environment dou you guys have to consider the concept of technical sep loss, which would be something like that:
AC1 a jet with a ground speed of 280 kts climbing thru 14000' cleared to 17000' heading 270, AC2 a turboprop ground speed of 170kts climbing thru 6000' also cleared to 17000' on a heading of 310. The 2 Aircrafts are already 3.2 NM appart increasing. Is this a sep loss (technical), considering you're working in a typical 5NM / 1000' separation environment??
In Oz this would be considered a breakdown of separation. We have the situation all the time of aircraft on diverging tracks more than 3NM but less than 5NM which are separated when they on departure frequency but if we accept one of them on the enroute frequency, they are suddenly not separated even though they were separated and are going away from each other.