@jon @partim if I remember well, the CC21000s (a sort of dual-voltage or rather bi-system version of the CC6500s) also had the AC pantograph oriented like the one on the BB22200, yet they had three pantos altogether, I believe: two for DC and one for AC. CC21000s are longer than the 15000/7200/222200 locos, so there was enough space for a third pantograph.