Laboratory railway power supply Synchronous-synchronous-converter © Sebastian Terfloth Test rig synchronous-synchronous-converter Asynchronous-synchronous-converter/ grid static converter © Sebastian Terfloth Test rig asynchronous-synchronous-converter/ grid static converter © Sebastian Terfloth Asynchronous-synchronous-converter Railway power supply/ contact line protection © Sebastian Terfloth Test rig railway power supply © Sebastian Terfloth Test rig contact line protection with protection devices (to the right) © Sebastian Terfloth Detail contact line protection device EFS 2 Contact wire/ contact stripe II © Sebastian Terfloth Detail test rig contact wire/ contact stripe II