Arcing Acela at Hamilton: Power car #2004 is an oddity among the Acela fleet, as the blue decaling below the lights flattens out, rather than arcing in the way seen among the rest of the fleet. However, there is an arc present in this shot. Specifically, a flash from electrical arc near the center of the pantograph on the trailing power car. Photo taken at Hamilton Station on July 5, 2017.
Acela (US), TGV (FR), Velaro (Ger, although there are British, Chinese and Russian versions as well)
There are other systems, such as the Japanese Shinkansen.
