With Google Earth, you get a higher resolution and color! And I get that on a 1600x1200 20.1" LCD monitor....
The Limerick-to-Cromby line looks like it comes off the upper left of the Limerick plant as shot in the first image you present. They don't enter the switch yard.
Where crossing the Perk, the lines from Cromby are the bottom two. They are slightly brighter than the others.
Your final image is of a North Wales switch yard, but I was actually referring to a much, much larger switch on North Wales Road.
this one You can see 9 wires entering it from the west. It sure looks like the Cromby wires lead to your small substation and the Limerick wires lead to this massive one off N. Wales Rd. The Topo maps seem to indicate the Cromby wires as a black dotted line and the Limerick as purple dotted.
Just get
Google earth already, it's free.